114 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



or 6 prominent setae on antero-lateroventral aspect. Galea with basal 

 joint subcylindrical, slightly shorter than terminal joint; terminal 

 segment narrower than basal joint, a few pores on lateroventral aspect. 

 Maxillary palpi with all segments subcylindrical. First segment about 

 as wide as long. Second segment as long as wide ; slightly narrower 

 than first joint; without setae; a few pores. Third joint wider than 

 long; about one-half length of second segment; 3 or 4 pores ven- 

 trally; distally with i minute seta on mesoventral aspect and i on 

 lateral aspect. Fourth segment slightly longer than wide; fully as 

 long as third joint ; without setae or pores. Postmentum slightly wider 

 anteriorly; i or 2 setae near each corner; i or more minute setae 

 along each lateral margin. First prementum with 2 setae just caudad 

 to base of each palpus, making transverse row of 4 setae. Labial 

 palpus with basal joint subcylindrical, at least one-half length of first 

 prementum, slightly longer than wide, i or 2 prominent setae dis- 

 tally on medioventral aspect, few pores ; terminal segment about one- 

 half length and one-half width of basal segment; without setae; 

 usually with i pore. 



Prothorax almost as long as combined length of mesothorax and 

 metathorax; wider posteriorly; slightly wider than long. Tergites 

 punctulate; anterior part of each tergite with 8 to 14 unpaired setae 

 in irregular transverse row, i seta on each tergite being close to mid- 

 dorsal suture; posterior part of each tergite with 5 to 7 setae in ir- 

 regular transverse row, 2 most medial setae usually paired or semi- 

 paired; I or 2 unpaired setae laterad to central areas of sclerite. 

 Episternum with 3 large and a few small setae; 2 minute setae be- 

 tween episterna which almost meet mesally. Epimeron with i small 

 seta. Presternal area {prst, fig. 13, a) consisting of 2 sclerites as 

 follows: A small, posterior, median sclerite anteriorly attenuate, 2 

 setae anteriorly; and a large subtriangular sclerite (comprising the 

 remainder of presternum) striate on anterolateral aspects, with i or 2 

 stout setae near each lateral margin, and anteriorly with 2 short di- 

 agonal paramedial rows each of 4 or 5 minute setae. Eusternum small, 

 membranous or weakly sclerotized. Sternellum and poststernellum 

 indefinite, small, membranous. 



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

 Mediotergites with fine shallow punctures more abundant anteriorly, 

 usually with minute setae in punctures ; transverse branch of impres- 

 sion reaching about one-fourth to one-third distance from longi- 

 tudinal branch to middorsal suture; longitudinal branch reaching al- 

 most one-half distance from transverse branch to posterior row of 



