86 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



face slightly excavate with small median carina, ventral margin of 

 inner face sharp, slightly convex ventrally and continued proximally 

 to base of penicillus, dorsal margin sharp and strongly convex dor- 

 sally. 



Ventral mouthparts only three-fifths to two-thirds as wide across 

 bases of stipites as at anterior ends of stipites. Cardines well separated 

 mesally. Stipites large, subrectangular, noticeably wider anteriorly; 

 proxistipes and dististipes not distinct ; usually 5 or 6 prominent setae 

 on antero-lateroventral aspect. Galea with basal segment subcylin- 

 drical, shorter than terminal joint, without setae or pores; terminal 

 segment narrower than basal segment, outer margin longer than inner 

 margin, 6 or 7 pores on ventral aspect. Maxillary palpi with all seg- 

 ments subcylindrical. First segment wider than long; distally on 

 mesoventral surface with group of several small pores and 2 setae. 

 Second joint as long as wide; as long as first segment and almost as 

 wide; without setae; with 2 pores. Third joint wider than long; 

 about one-half length of second segment ; 2 or 3 pores ventrally ; dis- 

 tally with I small seta on mesoventral aspect and i on lateral aspect. 

 Fourth segment longer than wide; slightly longer than third joint; 

 without setae or pores. Postmentum with i long seta at each pos- 

 terior corner, i or 2 setae at anterior corners and i to 3 setae 

 along lateral margins. First prementum with 3 or 4 setae just caudad 

 to base of each palpus, forming transverse row of 6 to 8 setae. Labial 

 palpi with basal joint at least one-half as long as prementum, slightly 

 longer than wide, without setae, with 3 to 6 pores; terminal joint 

 more than one-half length and about one-half width of basal seg- 

 ment, without setae, usually with i pore. 



Prothorax about three-fourths combined length of mesothorax and 

 metathorax; wider posteriorly; wider than long. Tergites minutely 

 punctulate ; anteriorly with from 9 to 12 setae (on each side of median 

 dorsal suture) in irregular transverse row, usually 6 to 9 conspicuous, 

 others tiny, none definitely in pairs ; posteriorly with 7 to 9 unpaired 

 setae in transverse row ; laterally with i or 2 setae between rows. Epi- 

 sternum with 2 or 3 large setae. Epimeron bearing i tiny seta. Pre- 

 sternal area consisting of 3 sclerites as follows : A small posterior me- 

 dian sclerite, anteriorly attenuate, with 2 tiny setae anteriorly ; 2 large 

 subtriangular lateral sclerites, usually joined anteriorly, striate on 

 anterolateral aspect with i stout seta laterad to center and a row of 

 4 or 5 minute "sensory" structures on anteromedial aspect. Eu- 

 sternum small, membranous or weakly sclerotized. Sternellum and 

 poststernellum indefinite, small, membranous. 



