152 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



lobes produced beyond nasale ; each bearing 3 setae, i very small and 

 sometimes lacking. 



Epicranial plates smooth, or with few small pits. Dorsal sulci 

 shallow ; each with 5 setae subequally spaced, most anterior seta long, 

 others small. Ventral sulci bearing row of 5 to 8 setae, usually 

 only 2 or 3 conspicuous. Two large, unpaired, lateroepicranial setae. 

 Eye spot absent; normal eye region bordered by 2 unpaired setae. 

 Postgenal areas expanded mesally, almost meeting; glabrous. 



Gula short, narrow ; goblet-shaped ; constricted posteriorly by con- 

 verging postoccipital sutures ; glabrous. 



Antenna with first joint weakly clavate ; almost two-thirds as 

 wide as long; without setae; 3 or 4 small pores. Second segment 

 subcylindrical, about two-thirds as wide as long; three-fifths length 

 of basal joint; i or 2 pores; a few small setae or pegs borne dis- 

 tally; i medium-sized conical "sensory" appendix just ventrad to 

 base of third joint. Terminal segment small, about one-half as 

 long as second segment and one-quarter as wide ; 4 setae and 2 or 3 

 "sensory" pegs on apex. 



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

 at base (ventral aspect) as long; retinaculum well developed; peni- 

 cillus sometimes reaching base of retinaculum. Distal half inward 

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

 inner face slightly excavate with small median carina, ventral margin 

 of inner face sharp and slightly convex ventrally, dorsal margin 

 sharp and moderately convex dorsally. 



Ventral mouthparts about four-fifths as wide across bases of stipites 

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

 large, subrectangular ; proxistipes and dististipes not distinct ; usually 

 4 or 5 prominent setae on antero-lateroventral aspect. Galea with 

 basal joint slightly longer and one-half wider than terminal segment, 

 without setae or pores; terminal joint curved, lateral surface longer 

 than inner surface, 2 or 3 pores on lateroventral aspect. Maxillary 

 palpi with all segments subcylindrical. First joint slightly longer 

 than wide; distally on mesoventral aspect with group of about 6 

 small pores and 2 setae. Second segment as wide as basal joint and 

 longer; without setae; 3 or 4 pores. Third segment about as wide 

 as long; about one-half length of second joint; 2 pores ventrally; 

 distally with i minute seta on mesoventral aspect and i near lateral 

 aspect. Fourth joint longer than wide; nearly as long as third joint; 

 sometimes i minute seta on medial aspect ; i pore on lateral surface. 

 Postmentum with i long seta near each corner. First prementum 



