1949] 
Smith — Leptothorax 
113 
mainder of the funiculus, last segment of the club longer 
than the combined length of the two preceding segments. 
Frontal area present but not strongly defined. Middle 
of the anterior border of the clypeus with a distinct but 
weak impression or emargination. Mandible 5-toothed. 
Thorax slender, highest in the vicinity of the junction 
of the promesonotum, sloping both anteriorly and pos- 
teriorly from this region; from above, widest in the pro- 
notum and narrowest at the base of the epinotal spines, 
with rounded humeri and obsolescent or missing dorsal 
thoracic sutures, also lacking the mesoepinotal impres- 
sion. Epinotal spines fairly robust, not strongly diver- 
gent, longer than the distance between their bases. 
Femora and tibiae, especially the former, noticeably in- 
crassated. Peduncle of petiole with a small but distinct 
anteroventral tooth. Petiolar node, in profile, angular, 
the anterior slope almost straight, the posterior slope 
shorter and more irregular than the anterior. Postpeti- 
olar node, from above, about one and one-fourth times 
broader than long, with rounded humeri and subparallel 
sides, somewhat constricted in the posterior half. Gas- 
ter with distinct angles. 
Mandibles striate, also punctate. Clypeus with about 
7 to 9 prominent carinae, one of them median and the 
other lateral. Head densely and minutely punctate with 
the front bearing delicate longitudinal rugulae. Cheeks 
rugulose or rugulosepunctate. Thoracic dorsum rugulose- 
punctate, the rugulae most evident on the promesono- 
tum; meso and metapleurae longitudinally rugulose punc- 
tate. Petiolar and postpetiolar nodes more minutely 
rugulosepunctate than the thorax. 
Head, thorax, petiole and postpetiole subopaque ; fron- 
tal area and gaster shining. In some lights the head is 
almost shining. 
Body with moderately abundant, coarse, suberect to 
erect, pale yellowish or grayish hairs ; those on the gaster 
more abundant than elsewhere. Antennae and legs hair- 
less, bearing only appressed pubescence. 
Brown; posterior part of gaster and much of head 
blackish. 
