70 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



to each long anterior hair, usually 2 or 3 small hairs along each side ; 

 few minute pores laterally. First prementum with i large and 2 

 smaller setae just caudad to base of each palpus, forming transverse 

 row of 6 hairs. Labial palpi with basal joint about one-half length 

 of first prementum, about as long as wide, i seta ventrally, i or 2 

 pores; terminal joint nearly as long as basal joint and one-half as 

 wide, without setae, usually with i pore. 



Prothorax about three-fourths combined length of mesothorax 

 and metathorax; wider posteriorly; usually slightly wider than long. 

 Tergites minutely punctulate; anteriorly with from 10 to 14 setae 

 (on each side of median dorsal suture) in transverse row, usually 

 8 to 12 prominent, remainder small or minute, none definitely paired, 

 all well removed from middorsal suture; posteriorly with 6 to 10 

 setae arranged transversely in irregular row, about 5 to 8 prominent, 

 none definitely paired ; sometimes i or more fine setae approximately 

 midway between transverse rows, usually laterad to center of sclerite. 

 Episternum with i large and 2 or 3 small setae. Epimeron bearing 

 I small seta. Presternal area consisting of 3 sclerites as follows: 

 a small posterior median sclerite, anteriorly attenuate, with 2 fine 

 short setae anteriorly; 2 large subtriangular lateral sclerites (usually 

 joined anteriorly), striate on anterolateral aspect, with i stout seta 

 laterad of center and a diagonal row of 3 or 4 minute "sensory" pegs 

 or setae on anteromedial aspect. Eusternum small, membranous or 

 weakly sclerotized; f ureal pits each with i minute seta. Sternellum 

 and poststernellum indefinite, small, membranous. 



Mesothorax and metathorax each about twice as wide as long. 

 Mediotergites sparsely punctulate; transverse branch of impression 

 reaching about one-fifth to one-third distance from longitudinal branch 

 to middorsal suture; longitudinal branch of impression short. An- 

 terior part of each mediotergite without setae except for a few minute 

 hairs issuing from some of punctures. Posterior part of each medio- 

 tergite with from 5 to 9 unpaired setae in transverse row, about 5 

 to 7 prominent, remainder small or minute. Lateral part of medio- 

 tergite with 2 or 3 prominent setae, sometimes additional small or 

 minute hairs. Anterior laterotergite subtriangular, one-half to two- 

 thirds as large as subovate posterior laterotergite. Episternum bear- 

 ing I or 2 fine setae but without spinelike setae. Eusternum with 2 

 conspicuous setae, sometimes additional minute setae. Mesothoracic 

 spiracle small, usually slightly larger than spiracles in abdomen. 



Legs subequal in length. Coxae of prothoracic legs with from 12 

 to 16 spinelike setae on anterior aspect, on mesothoracic and meta- 

 thoracic legs with 16 to 20 such setae; 2 or 3 stout setae and a few 



