I20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



sharp, projecting forward from near base of median denticle. Sub- 

 nasale without denticles or other special sclerotized structures. Para- 

 nasal lobes produced beyond nasale ; each lobe bearing 3 setae ( i 

 small). 



Epicranial plates sparsely and finely punctulate, punctures observa- 

 ble only under high magnification. Dorsal sulci shallow, each with 

 4 or 5 setae subequally spaced, the most anterior seta being long, the 

 next minute, sometimes wanting, others small. Ventral sulci bearing 

 row of 5 to 7 setae, with 2 to 5 conspicuous. Two large unpaired 

 lateroepicranial setae, sometimes with i or more fine, small or minute 

 setae just caudad to each large hair. Eye spot absent ; usual eye region 

 bordered by 2 unpaired setae. Postgenal areas expanded mesad, al- 

 most meeting; glabrous. 



Gula extremely short, narrowed posteriorly by converging post- 

 occipital sutures which almost meet ; glabrous. 



Antenna with first joint clavate, one-half to two-thirds as wide as 

 long ; without setae ; 3 to 6 small pores. Second segment subcylindri- 

 cal, two-thirds as wide as long ; two-thirds length of basal segment ; 

 I or 2 pores ; a few small setae borne distally ; i large conical "sen- 

 sory" appendix just ventrad to base of third segment. Terminal seg- 

 ment small, barely half as long as second joint and one-quarter to 

 one-third as wide ; 4 setae on apex. 



Mandibles (fig. 24, b) elongate; base narrow, width at ventral 

 aspect of base only one-half total length of mandible; retinaculum 

 (ret) relatively small; penicillus (pen) short, failing to reach base of 

 retinaculum. Distal half long, inward bending, pointed, somewhat 

 bladelike with inner margin sharp and slightly convex ventrally, outer 

 margin thickened ; dorsal surface flattened or slightly excavate ; ven- 

 tral aspect slightly convex. 



Ventral mouthparts about three-fourths to four-fifths as wide across 

 bases of stipites as at anterior ends of stipites. Cardines only slightly 

 separated. Stipes large, subrectangular ; proxistipes and dististipes not 

 distinct; usually 3 prominent setae on antero-lateroventral aspect. 

 Galea 2-segmented ; basal segment with ventral surface usually some- 

 what flattened, about as long as terminal segment, without setae or 

 pores. Terminal joint narrower than basal segment, 4 to 7 faint pores 

 on lateroventral aspect. Maxillary palpi with all segments subcylindri- 

 cal. First segment as long as wide ; distally on mesoventral surface 

 with I or 2 small pores and i small seta, sometimes additional pores 

 ventrally near center of segment. Second segment longer than wide ; 

 longer than first joint and as wide ; without setae ; 2 or 3 pores. Third 



