98 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



ridge; serrate when uneroded, with at least 5 or 6 subequal, short, 

 sharp, forward -projecting denticles. Paranasal lobes produced be- 

 yond nasale, each bearing 3 setae (i small). 



Epicranial plates punctulate. Dorsal sulci (ds) shallow and in- 

 conspicuous; each bearing 5 setae, subequally spaced, the most an- 

 terior hair being very long, the next seta small and the 3 most pos- 

 terior setae very small. Usually i to 3 prominent setae anterad to 

 dorsal sulci. Ventral sulci bearing row of 7 to 9 setae, usually about 

 6 or 7 conspicuous. Two pairs of long lateroepicranial setae {led, 

 lev, fig. 21, a) ; also i seta fa^rther dorsad and i or 2 unpaired setae 

 farther anterad or anterodorsad (in region between paired setae and 

 setae surrounding eye spot) ; sometimes additional minute setae scat- 

 tered over surface. Eye spot (e) black, well defined, ovate or cir- 

 cular ; surrounded by 5 or 6 unpaired setae. Postgenal areas slightly 

 expanded mesad ; glabrous. 



Gula elongate, narrow ; glabrous. 



Antenna with first segment clavate, about two-thirds as wide as 

 long; without setae; 3 to 5 small pores. Second segment subcylin- 

 drical, two-thirds as wide as long; three-fifths length of basal joint; 

 I or 2 pores; a few small setae distally; i medium-sized conical 

 "sensory" appendix just ventrad to base of third segment. Terminal 

 segment small, three-fifths as long as second segment and one-third 

 as wide ; a few setae on apex, i usually larger than others. 



Mandible of moderate length, robust; about two-thirds as wide 

 at base as long; penicillus sometimes reaching base of retinaculum. 

 Distal half inward bending; pointed; outer surface convex with 

 moderately deep dorsal groove ; inner face slightly excavate with lon- 

 gitudinal carina; ventral margin of inner face sharp and slightly 

 convex ventrally, extending backward past retinaculum to near mesal 

 aspect of base of mandible; dorsal margin of inner face sharp and 

 strongly convex dorsally, extending backward to posterior limit of 

 retinaculum. Retinaculum small for size of mandible, base somewhat 

 recessed between elongate margins of inner face of anterior part of 

 mandible. 



Ventral mouthparts only two-thirds as wide across bases of stipites 

 as at anterior ends of stipites. Cardines slightly separated. Stipes 

 large, wider anteriorly, inner margin straight, outer margin slightly 

 convex; proxistipes and dististipes distinct (as in cinctus, fig. 22, b) ; 

 usually 4 to 6 prominent setae on antero-lateroventral aspect, with 

 I or 2 small setae farther caudad. Galea with basal joint subcylin- 

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

 segment narrower than basal segment, outer margin longer than inner 



