0n a new Camponotus from Madagascar. 271

XXI.—A new Camponotus from Madagascar and a Small
Collection of Ants from Mauritius. By Horace
Donisthorpe, F.Z.S., F.R.E.S., etc.

This paper deals with a small collection of ants sent to mo
by M. Raymond Mamet of Mauritius.

There are three new species which T have described;
one of these is a second species of the interesting genus
Dodous Donisthorpe.

Two of the new species are from Mauritius.

I have arranged the list in the order of M. Mamet's
numbers and not under that of subfamilies, etc., as in my
paper on the Ants of Mauritius [Ann. Mag. Nat. Hist, (11)
xiii 25-35 (1946)].

No. 123. Camponotus (Tanaemyrmex) gérberti, sp. n.

[[soldier]]. Very pale dirty yellow, head reddish yellow,
mandibles dark red, teeth, scapes, anterior border of
clypeus, and extreme anterior angles of cheeks black,
clothed with very sparse outstanding longer and shorter
yellow hairs and some fine very short decumbent yellow
hairs. Sculpture consisting of very fine reticulations, a
little stronger on head.

Head large, triangular, considerably broader behind than
in front, broadest a little before posterior angles, which are
rounded and prominent, posterior border excised, slightly
sinuate on each side; mandibles massive, strongly
punctured and with transverse ridges, masticatory border
armed with six large strong teeth, the apical one being
the longest, curved and sharp, the next two longer and
sharper than the last three ; clypeus large, somewhat flat,
carinate and slightly convex on disc, anterior border
considerably produced in middle where it is somewhat
crenulate, and five large punctures are present along the
edge, and smaller punctures, rather wide apart, are
scattered over the rest of the surface, posterior border
excised in middle ; frontal area very faintly defined ;
frontal carinas rather long, raised, with sharp edges, the
rims or edges enclosing the antennal sockets are consider-
ably raised and prominent; a very fine narrow longitu-
dinal ridge takes the place of the frontal furrow and
extends between the frontal carinae as far back as their
extreme edges ; eyes large, broad oval, rather flat, are

272                  Mr. Horace Donisthorpe on a

situated rather high up before the middle of the sides of
the head; antenna 12-jointcd, scape long, thickened at
apex, extending beyond the posterior border of head
funiculus with all the joints elongate, first slightly shorter
than the others, last joint long and pointed. Thorax
longer than broad, broadest behind centre of sides of
pronotum, somewhat slender behind ; pronotum ample.
convex, with a short neck, sides margined, considerably
widened afterneck, posterior border semicircular ; sutures
between pro- and mesonotum, and meso- and epinotum
fine but distinct; mesonotum longer than broad, shorter
than pronotum, somewhat flat on disc, sides rather
straight, epinotum longer than mesonotum, sides rather
straight, angle between dorsal surface and declivity not
marked, dorsal surface longer than declivity. Scale of
petiole rather thick at base, anterior surface slightly
convex, posterior surface slightly concave, upper surface
narrow and forming a rather sharp ,ridge ; gaster oval,
not very voluminous, pointed at apex. Legs fairly long;
tibiae prismatic. Long. 18 mm.                               

[[worker]] Of the same pale colour as the [[soldier]]. but only the extreme
anterior angle of clypens and cheeks blackish; the
mandibles are pale yellow with the teeth red. The
sculpture and hairs are similar.

Head long, narrow, broader in front than behind,
broadest a little in front of sides of head, narrowed, rather
sharply behind eyes to base ; teeth to mandibles somewhat
more slender and sharper, carinae on clypeus a little more
pronounced ; eyes more prominent. Thorax narrow and
slender; pronotum more narrowed to apex. Scale of
petiole of similar shape, but a little narrower ; gaster and-
legs of similar shape. Long. 10-12 mm.

Described from eight soldiers and seven workers.

These ants were found by M. Mamet in an old collection
of insects at the College of Agriculture, Mauritius. They
were collected by S. Geberti in 1917, on Sainte Marie
Island, which Ls situated on the East Coast of Madagascar.

No. 124. Dodous bispinosus, sp. n.

Very like trispinosus but without the two shorter spines
on the mesonotum. The sculpture is different, and the
species is also a little darker in colour.

new Camponotus from Madagascar.               273

[[worker]]. Head: the sculpture is quite different; the disc is
smooth and shining, from the outer part of the smooth
surface at sides semicircular carinae run on each side along
the cheeks, and from the posterior part a few weaker
carinae extend towards base of head, the space between
these and the posterior border of head being smooth and
shining.

Thorax: the ridges on the pronotum are considerably
less marked; the mesonotum is smooth and shining and
there are no spines present. The ridges on the sides of the
thorax are less marked; the dorsal surface and the
declivity of the epinotum are smooth and shining.

The spines on the pronotum are slightly longer and
stronger, and those of the epinotum, being of a different
shape, being slightly shorter, and projecting outwards
then inwards in an even curve. Long. 5 mm.

Described from two specimens collected on Le Pouce
Mt., November 2nd, 1948. Coll. Ray. Mamet.

I erected the genus Dodous for the receipt of a number
of workers and two males taken by M. Raymond Mamet
on Colcotte Mt., Mauritius, in 1941. [Proc. R. Ent. Soc.
Lond. (B) xv. pts. 11 and 12 (Dec. 1946), pp. 145-46.
4 figs.]

The description of the genus requires a slight modifi-
cation as there are no spines on the mesonotum in this
species.

No. 125. Solenopsis mameti Donisthorpe, Ann. Mag.
Nat. Hist. (11) xii. 777 (1945) 1946.
35 [[worker]][[worker]]. Le Pouce Mt., Mauritius. " Nesting in decaying
wood." November 2nd, 1948 (Mamet).

No. 126. Technomyrmex primroseae, sp. n.

[[worker]]. Black, rather shining, mandibles, antennae and legs
dirty pale yellow, the petiole brighter yellow. Sculpture :
head and gaster finely reticulate, thorax more distinctly
so, clothed with fine golden pubescence, which is more
pronounced on gaster and a few short outstanding hairs,
more being present on gaster.

Head oval, somewhat narrower in front than behind,
broadest a little behind eyes, posterior angles rounded,
.posterior border excised in middle ; mandibles moderately
long, triangular apical tooth sharp and curved, masticatory

Ann. & May. Nat. Hist. Ser, 12, Vol, ii,         18

274         On a new Camponotus from Madagascar.

border armed with a number of small sharp teeth, the
second and fourth being longer than the third ; clypeus
fairly large, anterior border excised in middle, posterior
border extending in a point between the frontal carinae;
frontal area small but distinct ; frontal carinae short, low,
fairly wide apart, parallel; eyes large, round, rather
prominent, situated in front of sides of head ; antennal
12-jointed, scape long, extending beyond posterior border
of head, funiculus with first joint longer than third,
second joint the shortest, rest of joints gradually increasing
in length and breadth, last joint as long as the two
preceding taken together. Thorax with a neck, longer
than broad, constricted in middle, broadest at humeral
angles; pronotum large, transverse, convex, anterior
border margined, posterior border semicircular encircling
mesonotum ; mesonotum shorter and narrower than pro-
notum, a little longer than broad, slightly convex;
sutures between pro- and mesonotum and meso- and
epinotum well marked, especially the latter; epinotum
with angle between dorsal surface and declivity well
marked, declivity abrupt, somewhat flat, considerably
longer than dorsal surface. Petiole narrow, flat, slightly
longer than broad, scale entirely rudimentary ; gaster
oval, overhanging the petiole, pointed at apex, fifth seg-
ment extending a little beyond the fourth, cloacial
opening terminal. Long. 2.5 mm.

Described in honour of my cousin Primrose Griffiths
(nee Donisthorpe), who has always taken an interest in my
work, from sixteen workers. Mauritius on Le Pouce Mt.,
November 2nd, 1948, nesting in a dead tree stump
(R. Mamet).

No. 127. Strumigenys (Cephaloxys) raymondi Donis-
thorpe, Ann. Mag. Nat. Hist. (11) xii. p. 779 (1945),
1946.

10[[worker]][[worker]]. " In decaying wood." Le Pouce Mt., Mauritius,
-November 2nd, 1948 (Mamet).

No. 128. Brachymyrmex cordemoyi Forel, Ann. Soc. Ent.
Belg. xxix. p. 49 (189.1).

21 [[worker]], 3 winged [[queen]][[queen]] " Nesting in dead tree stump."
Le Pouce Mt., Mauritius (Mamet), November 2nd, 1948,

On the Jurassic Flora of Yorkshire.              215

No 129. Camponotus (Myrmosericus) aurosus Roger,
Berlin Ent. Zeitschr. vii. p. 134 (18G3).

1 [[soldier]], 1 [[worker]]. Le Pouce Mt., Mauritius (Mamet), November
2nd, 1948.

No. 130. Pheidole (Pheidole) megacephala F., Ent. Syst.
"ii. p. 361 1793).
1 [[worker]]. Le Pouce Mt., Mauritius, November 2nd, 1948
(Mamet).

XXII.—Notes on the Jurassic Flora of Yorkshire, 40-42.
By Tom M. Harris, University of Reading.

40. Otozamites anglica (Seward), n. comb.
(Figs. 1, 2.)

1900. Nageiopsis anglica Seward, p. 288, text-fig. 51.

The type specimen of " Nageiopsis anglica " is in the
Whitby Museum. It was borrowed for detailed examina-
tion on the supposition that it was a little-known conifer ;
a cuticle preparation, however, at once proved that it is
Bennettitalean. It was further noticed that the specimen
was not fully exposed, and when this was done it was
found that the bases of the pinnae are broader than are
shown in Seward's figure ; it has therefore been refigured
here. It proves to be an Otozamites leaf of normal shape
but rather small size. Among Yorkshire. species it is,
perhaps, closest to 0. penna Harris and I at first supposed
them identical, but further study disclosed differences.

Emended diagnosis.—Leaf rather small, estimated length
6-10 cm., width 2.5-3.5 cm. or less. Shape of leaf as a
whole oblanceolate, apex being more or less rounded, base
tapering. Petiole rather short, slender, smooth. Pinnae
arising at an angle of about 90° over most of the leaf, but
a smaller angle above; pinnae mostly separated by
1-2 mm. ; shape elongated-triangular in the lower part of
the leaf, becoming parallel sided above, apex obtusely
pointed. Pinna attached over the lower half of the
proximal border; auricle moderately developed, partly
crossing the rachis (but not always exposed); less developed
in upper pinna;. Veins rather distant, fine, concentration

18*