144 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



median denticle; finely serrate (when uneroded) on each side of 

 median tooth. Paranasal lobes produced beyond nasale, each bearing 



3 setae (i small). 



Epicranial plates nearly smooth. Dorsal sulci shallow, each with 



4 setae subequally spaced, the most anterior seta being very long ; 

 others very small, somewhat peglike. Ventral sulci bearing row of 

 2 to 4 setae, only i or 2 conspicuous. Two large unpaired latero- 

 epicranial setae. Eye spot black, well defined, ovate or circular; 

 bordered by 2 prominent setae. Postgenal areas expanded mesad, 

 almost or actually meeting. 



Gula (gu, fig. 27, b) short, greatly narrowed (sometimes oblit- 

 erated) in the middle by converging postoccipital sutures; glabrous. 



Antenna with first joint clavate, one-half to three-fifths as wide 

 as long ; without setae ; 7 to 9 small pores. Second joint subcylindri- 

 cal, slightly more than one-half as wide as long ; two-thirds length of 

 basal joint ; i or 2 pores ; a few minute setae borne distally ; i medium- 

 sized conical "sensory" appendix just ventrad to base of third joint. 

 Terminal segment small, about one-third as long as second segment 

 and one-quarter as wide ; 4 setae on apex. 



Mandible of moderate length, robust ; ventrally, about two-thirds 

 as wide at base (ventral aspect) as long; retinaculum very large; 

 penicillus sometimes reaching base of retinaculum. Distal half inward 

 bending ; pointed ; outer surface convex with shallow dorsal groove ; 

 inner face slightly excavate with small median carina, ventral margin 

 of inner face sharp and slightly convex ventrally, dorsal margin sharp 

 and more strongly convex dorsally. 



Ventral mouthparts three- fourths as wide across bases of stipites as 

 across anterior ends of stipites. Cardines slightly separated ; without 

 seta between rami of Y-shaped brace. Stipes large, subrectangular ; 

 proxistipes and dististipes not distinct; with 2 prominent setae on 

 antero-lateroventral aspect. Galea with basal joint subcylindrical, 

 about as long as terminal joint, without setae or pores ; terminal seg- 

 ment narrower than basal segment, with 4 to 6 pores on lateroventral 

 aspect. Maxillary palpi with all segments subcylindrical. First joint 

 almost as wide as long; distally on mesoventral surface with group 

 of 3 to 5 small pores ; without setae. Second segment almost twice 

 as long as wide ; longer than first seginent and as wide ; without setae ; 

 with 3 or 4 pores. Third segment almost as long as wide ; one-half 

 or less length of second segment ; without setae ; with 2 or 3 pores 

 ventrally. Fourth segment slightly longer than wide ; almost as long 

 as third segment ; without pores or setae. Postmentum with i long 



