HENRY J. FRANKLIN. 97 



both together; most of the segments of the flagellum appearing sHghtly 

 arcuate when viewed laterally (the first two segments and the apical 

 one are not at all arcuate). 



Thorax. — Dorsum clothed with dark brown or black pile ; the front 

 part with a noticeable admixture of pale yellow hairs ; the very center 

 of the disc naked, smooth and shining. Mesopleura covered with pale 

 yellow pile from the level of the bases of the wings to the bases of the 

 legs. Metapleura mostly clothed with pale yellow pile. Sides of me- 

 dian segment also with considerable pale yellow hair. 



Abdomen. — Dorsum : segments one and two entirely covered with 

 yellow pile ; segment three either entirely clothed with yellow pile or 

 with the greater part yellow and the extreme sides more or less dark ; 

 segment four covered with black pile ; segment five mostly black, but 

 with its very apical margin bearing pale ferruginous pile ; segments 

 six and seven with pale ferruginous pile. Venter dark, but most of 

 the segments with long apical fringes of very pale yellow hairs. 



Genitalia. — Claspers (fig. 183 and fig. 193) long and appearing 

 moderately powerful ; branches pointed at the apex, as viewed dorsally, 

 with the very points rounded, these apices being bent strongly mesad ; 

 the squamae weakly bilobed, the inner lobe being distinctly larger and 

 more prominent than the outer one, and extending mesad far beyond 

 the inner margin of the volsella (this inner lobe seems to take the form 

 of a fiat plate or scale more than is commonly the case with Bonibus 

 males), the outer lobe short and tending to be pointed, but with the 

 ver}^ apex rather broadly rounded ; volsellae very long and extending 

 considerably beyond the tips of both the sagittae and the squamae, 

 their apices blunt and quadrate and their outer margins evenly out- 

 curved, hairs, except on the basal portion of their inner sides, being 

 unusually wanting. Sagittae with shafts long and bent outward 

 strongly in the middle, with a noticeable projection on the middle of 

 the lower side of each ; their heads reaching as far posteriorly as the 

 apices of the squamae, being somewhat foliaceous and recurved at the 

 tip (this tip being rounded) and without noticeable spines, teeth or 

 points. Uncus moderately broad behind, but tapering to a narrow 

 recurved tip. 



Wings. — Very light, but slightly infuscate. 



Legs. — Coxae mostly dark, the hind pair with a few yellowish hairs ; 

 fore and middle trochanters with a considerable amount of very pale 

 yellow pile, the hind pair with only a very little light hair ; the basal 

 halves of the front, and sometimes also of the middle, femora with 

 much pale yellowish hair on their lower sides, the remaining portions 

 all being dark ; the hind femora dark, sometimes with a few light hairs 

 on the lower sides of their basal portions ; tibiae dark, the outer faces 

 of the hind pair slightly convex and sparsely hairy and their hind fringes 

 moderately long ; hind metatarsi oblong, slightly concaved on their 



TRANS. AM. ENT. SOC, XXXIX. (13) 



