122 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



posterior surface. Trochanter with 5 to 8 spinehke setae on antero- 

 medial surface; 6 to 12 such setae and i fine seta scattered on poste- 

 rior surface ; 2 well-developed setae on medial aspect. Femur usually 

 with 5 to 7 spinelike setae on anteromedial surface ; 3 to 7 spinelike 

 setae and i slender seta on posterior surface; i long seta on medial 

 aspect ; a few fine setae on lateral surface. Tibiotarsus about as long 

 as femur but narrower; 5 or 6 setae around distal margin; 2 or 3 

 spinelike setae and i slender seta on anteromedial surface ; 2 or 3 spine- 

 like setae on posterior surface. Ungula when uneroded about as long 

 as tibiotarsus. 



First to eighth abdominal segments subequal ; first segment short- 

 est ; in material at hand the first segment is widest in some specimens 

 and the fourth segment widest in others. Mediotergites with a few 

 small shallow pits ; transverse branches of impressions slightly sinuate, 

 on second to fifth segments reaching middorsal suture, failing to reach 

 the suture on first, sixth, seventh, and eighth segments ; longitudinal 

 branch of impression extending one-half to three-fourths distance 

 from transverse branch to posterior transverse row of setae, the length 

 increasing from first to eighth segments. Anterior part of mediotergite 

 bears several minute setae scattered along sclerite, mostly in front of 

 transverse branch of impression ; also 3 to 5 small, widely separated, 

 unpaired setae arranged as follows : i near medial end of impression 

 (usually slightly caudad to impression), sometimes i or 2 toward 

 middle of transverse branch of impression, i larger seta farther 

 laterad and caudad (equidistant from transverse and longitudinal 

 branches of impression), and i laterally below longitudinal branch of 

 impression. Posterior part of mediotergite with 5 setae in transverse 

 row, arranged as 2 pairs and i unpaired hair farther laterad. Some- 

 times a few additional minute setae observable at high magnifications. 

 Laterotergite I extending length of segment ; usually bearing 3 setae. 

 Spiracles subequal ; borne in posterior part of very small spiracular 

 sclerite situated in anterior half of segment, directly laterad to trans- 

 verse branches of impressions on mediotergites. Pleurite well de- 

 veloped, subovate or subtriangular, bearing 2 to 4 setae ; size diminish- 

 ing from first to eighth segments. Sternum of i piece, subquadrate, 

 narrower posteriorly, without definite impressions, bearing 6 to 10 

 conspicuous setae around margins, and sometimes additional minute 

 setae. 



Ninth abdominal segment (fig. 24, c, d), exclusive of urogomphi, 

 shorter than eighth abdominal segment and three-fourths as wide; 

 slightly wider than long ; sides of anterior half subparallel, posterior 



