I08 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



Antenna with first segment clavate, three-fourths as wide as long. 

 Second joint subcyHndrical, almost as wide as long; one-half length 

 of basal joint; on specimen at hand, right antenna with I large, 

 conical "sensory" appendix, left antenna with 2 such appendices. 

 Terminal segment as long as second joint and one-third as wide. 



Mandibles about two-thirds as wide at base (ventral aspect) as 

 long; retinaculum of moderate length. Distal half inward bending; 

 pointed; outer surface convex with moderately deep dorsal groove; 

 inner face slightly excavate with small median carina ; ventral margin 

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

 and strongly convex dorsally. 



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

 anterior ends of stipites. Cardines slightly separated. Stipes large, 

 wider anteriorly; proxistipes and dististipes not distinct; 4 setae on 

 antero-lateroventral aspect. Galea with basal joint ring-shaped; half 

 as long as terminal joint; terminal segment narrower than basal 

 joint. Maxillary palpus with first segment ring-shaped ; much wider 

 than long. Second joint subcyHndrical ; as long as wide ; longer than 

 first joint and three-fourths as wide. Third segment ring-shaped; 

 much wider than long ; about one-half length of second joint. Fourth 

 joint longer than wide ; longer than third joint. Postmentum sub- 

 rectangular with I long seta near each corner. First prementum with 2 

 or 3 setae just caudad to base of each palpus, making transverse row 

 of 4 to 6 setae. Labial palpus with basal joint cylindrical, longer than 

 wide, without setae; terminal joint small, more than one-half length 

 and about one-half width of basal segment. 



Prothorax about three-fourths combined length of mesothorax and 

 metathorax; wider posteriorly; one-third wider than long. Tergites 

 minutely punctulate ; with about 23 setae on each side of median dorsal 

 suture arranged as follows: anteriorly with 10 to 12 setae in an ir- 

 regular transverse row; posteriorly with 9 unpaired setae in trans- 

 verse row, some minute, but mostly long ; 3 setae along lateral part of 

 tergite, the middle seta of the 3 being farthest mesad. Presternal 

 area consisting of 3 sclerites as follows : i small posterior median 

 sclerite, anteriorly attenuate; 2 large subtriangular lateral sclerites, 

 striate on anterolateral aspect, with i stout seta laterad to center 

 and a diagonal row of 4 minute setae on anteromedial aspect. 



Mesothorax and metathorax each at least twice as wide as long. 

 Mediotergites slightly rugose, punctures minute and sparse; trans- 

 verse branches of impressions reaching about one-third distance from 



