462 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
project laterally and upward from the sides of the pronotum. The 
meso- and epinotum each has a stout, triangular spine at the poste- 
rior corners, and the node is armed at apex with a slender acuminate 
spine as long as the node. The whole body is covered with fine 
yellow pubescence. 
158. Dolichoderus (Monacis) laminatus Mayr subsp. luteiventris 
Emery. 
A female from Madeira-Mamoré Camp 41 agrees with Emery’s 
description. It measures 5.5 mm. in length. The head, thorax, 
and petiole are black, and the gaster testaceous, each segment of the 
latter with a fuscous border. The legs are testaceous. 
159. Dolichoderus (Monacis) varians, sp. nov. 
Worker. Length 5 mm. 
Near D. lamellosus Mayr. Head oval, excluding mandibles, a little 
longer than broad, the sides very convex; occipital angles narrowly 
rounded, the border narrowly concave. Clypeus flat above, with 
rounded anterior border. Frontal area very large, triangular. Fron- 
tal carinae thin, slightly elevated, extending to opposite posterior 
third of eye. Eyes small, convex, located in front of sides of head, a 
little behind the middle. Antennae slender, the scape thickened 
toward apex, extending a third its length beyond the occipital corners; 
all the funicular joints longer than broad. Pronotum transverse, 
broadest in front, the anterior angles drawn out to form acute tri- 
angular spines, which are flattened above; anterior border convex at 
middle, concave at sides; sides sharply but not broadly margined. 
Mesonotum one and a half times as long as broad, narrowed behind; 
the surface slightly concave; sides with a narrow elevated margin. 
Base of epinotum from above triangular, one and a half times as long 
as broad, sides roundly margined; apical portion transversely de- 
pressed and posterior to this elevated into a very thin lamella; de- 
clivity a little shorter than the base. 
Petiolar node twice as broad as long; in profile twice as high as 
thick; anterior and posterior surfaces slightly convex, the apex 
rounded in front, behind elevated into a very thin broad lamella. 
Gaster short and thick. 
Subopaque. Head, thoracic dorsum, and anterior surface of 
