1928] A New Species of Thaumatomyrmex from Cuba 
165 
posterior face. The lower surface with a serrate lamina which 
ends posteriorly in a blunt tooth. Gaster large with a flat, per- 
pendicular anterior face; constriction not pronounced; sting 
short and stout. 
Head with numerous fairly coarse punctures interspersed 
with delicate striae which together with the punctures give it a 
submatte appearance. Clypeus and dorsal portions of the for- 
ward-projecting lobes more plainly striate, without punctures. 
Thorax more shining, punctures somewhat sparser, the striae 
confined to the sides of the epinotum. Punctuation of the 
petiole as in the thorax, without striae. Abdomen much more 
shining, the punctures noticeably sparser. 
Hairs long, brownish yellow. Sparse on the head, somewhat 
more numerous on the thorax and petiole, abundant on the 
gaster. Those on the appendages short, fine and appressed. 
Piceous black; mandibles, antennae, frontal lobes, legs and 1 
the tip of the gaster brownish yellow. 
Mina Carlota, Cuba. December 2, 1927. 
Through the courtesy of Dr. W. M. Wheeler I have been 
able to compare the new species with a cotype of T. ferox Mann. 
Mayr’s description together with Emery’s figures allow a fairly 
satisfactory comparison with T. mutilatus. The new species 
appears to be intermediate in structure between the two, al- 
though sufficiently distinct from either to amply justify its 
specific status. The head of T. cochlearis is plainly longer 
than in ferox but shows a similar dilation anterior to the eyes, 
a condition which is not present in mutilatus. The occipital 
angles are distinctly more acute in the new species giving the 
head a more quadrate appearance than in either of the pre- 
viously described forms. The mandibles of cochlearis are similar 
to those of ferox but the terminal spine is shorter and the median 
spine feebly arcuate rather than sinuate. Both cochlearis and 
ferox may be separated from mutilatus by the absence of the 
rudimentary fourth spine at the base of the third. Cochlearis 
further differs from ferox in the longer basal face of the epinotum,, 
the shorter mesonotum the noticeably narrower petiole and the 
very different sculpture. In this last it appears to approach 
mutilatus in which the sculpture is even more pronounced. 
