Occasional Papers of the Museum of Zoology 27 



excepting a narrow yellow border on each side adjacent to the 

 black of the sides, the tips of the stoma fuscous as in the other 

 species; there is also an obscure narrow light stripe along each 

 side of tergites, an irregular bright spot occurring tv-pically at 

 anterior corner but also one near middle and one caudad. Venter 

 brown. 



Head marked as in colombiana, but median pale stripe crossed 

 by a dark V-shaped mark at level of antennal sockets and a narrow 

 dark line farther caudad. Femora black excepting a narrow 

 light ring at base, an irregular and interrupted one at middle and 

 one at distal end which is most distinct above, the dark areas 

 becoming more extensive than in colombiana. Tibiae colored 

 essentially as in colombiana; black excepting a narrow sub-basal 

 ring, a similar submedian one and a light spot at distal end above 

 with an obscurer light region between middle annulus and distal 

 end. Metatarsi dark excepting a fulvous annulus at distal end 

 and one proximad of middle. 



Stoma saddles more strongly elevated, and clothed with more 

 numerous hairs between spinules. Posterior margin of all stoma- 

 bearing tergites deeply incised at middle with stoma projecting in 

 median region of excavation in an acute angle (Plate V, Fig. 26). 



First tarsus of seventh legs with eight segments as against 

 eleven in colombiana, the second with thirty-eight. First tarsus of 

 thirteenth legs with eleven segments, the second with thirty-eight. 

 First tarsus of fourteenth legs with eleven segments, the second 

 with forty-four. First flagellum of antennae in type with sixty-two 

 articles. 



Length, 24 mm. 



Brazil: (W. M. Mann, Stanford Expedition, 1911). One male. 

 Type, M.C.Z., 1455. 



Most readily distinguished from the preceding species by the 

 deep excavation of posterior border of tergites with the angular 

 projection at bottom of each into which the stoma projects, the 



