354 LIST OF DIPTERA. 



Group XVII. 





Dasypogon viduus, n. S.* mas. Niger, cinereo pubescens, thoracis 

 vittis duabus cinereis, antennis pedibusque nigris, alis subcinereis 

 apice obscurioribus. 



Body black ; head narrower than the chest, clothed with gray 

 down, beset behind the eyes with a row of black bristles, thinly 

 clothed beneath wtth gray hairs ; crown piceous, beset on each side 

 with black hairs ; clypeus armed with twelve long black spines : 

 eyes black ; fore part flat ; its facets a little larger than those of the 

 convex part : lip piceous, clothed at the tip with tawny hairs ; hy- 

 postoma and palpi black, clothed with black hairs : feelers black ; 

 first and second joints clothed with long black hairs ; second joint 

 a little shorter than the first ; third joint spindle-shaped, nearly as 

 long as the first and the second, clothed above with short black 

 hairs ; fourth joint short ; fifth joint extremely short: chest covered 

 with gray down, beset on each side and behind with long black 

 bristles ; disk black, excepting two gray stripes, which are widened 

 in front and behind, and are beset with a few short black hairs : ab- 

 domen slightly shining, with an indistinct gray stripe on each side, 

 tapering from the base to the tip, narrower than the chest and more 

 than twice its length, thinly clothed with very short black hairs, and 

 having also a few longer gray hairs at the base and on the under- 

 side ; the black hairs are more numerous at the tip ; first and se- 

 cond segments short ; third and following segments long, but suc- 

 cessively decreasing in length ; third segment with a cross row of 

 punctures on the furrow near the base : legs black, thinly clothed 

 with short gray hairs ; shanks and feet beset with black spines ; feet 

 long, clothed beneath with dark tawny down ; claws black ; foot- 

 cushions dark tawny ; tips of fore shanks armed with a curved black 

 tooth, corresponding with a large black tubercle at the base of the 

 fore feet : wings very slightly gray, dark gray at the tips ; wing-ribs 

 piceous ; veins black, piceous at the base ; poisers yellow. Length 

 of the body 6 — 7 lines ; of the wings 10 — 12 lines. 



a. Colenso, New Zealand. Presented by Dr. J. Hooker. 



Dasypogon sexfasciatus ? Say, Journ. Acad. Phil. iii. 50, 1. Wied. 



Auss. Zweif. i. 408, 68. 

 a. Nova Scotia. From Lieut. Redman's collection. 



Dasypogon argenteus ? Say, Journ. Acad. Phil. iii. 51, 4. Wied. 



Auss. Zweif. i. 409, 69. 

 a. Nova Scotia. From Lieut. Redman's collection. 



