LIST OF DIPTERA. 317 



Dasypogon Agave, n. s., fern. Niger, aureo-pilosus, thorace abdo- 

 mineque aureo, bivittatis, antennis pedibusque nigris, tibiis rufis, 

 alls limpidis, basi ad costam venarumque marginibus apice sub- 

 fulvis. 



Allied to D. Digentia. Body black : head not so broad as the 

 chest, clothed with a few black bristles on the crown, with thick 

 long pale yellow hairs behind and beneath, and on the front with 

 bright yellow down and hairs which also adorn the clypeus : eyes 

 purplish black, flat, and with large facets in front, like those of D. 

 Digentia : mouth also like that of the preceding species : feelers black ; 

 first and second joints thinly clothed with short black hairs of equal 

 length ; third joint slightly tapering from the base to the tip, a little 

 longer than the first and the second ; fourth joint very small : chest 

 and breast like those of D. Digentia : the golden down of the sides 

 of the chest is spread, though more slightly over the back, and also 

 covers some parts of the sides of the breast : abdomen more thickly 

 clothed than that of D. Digentia with golden hairs, and having a 

 stripe of golden bloom along each side : legs black, clothed with 

 yellow hairs ; thighs armed with a few tawny spines, more slender 

 than those of the preceding species ; shanks red, beset, as are also 

 the feet, with tawny and red spines, the latter have black tips ; claws 

 piceous, ferruginous at the base, where there is a short blunt tooth 

 on the under-side : wings colourless, slightly tawny at the base, on 

 the fore borders, and along the sides of the veins towards the tips ; 

 wing-ribs and veins ferruginous, the latter piceous towards the tips ; 

 poisers yellow. Length of the body 11 lines; of the wings 16 

 lines. 



a. Swan River. Presented by Sir J. Eichardson. 



b. New Holland. Presented by the Earl of Derby. 



c. New Holland. Presented by the Haslar Hospital. 



Dasvpogon Thalpius, n. s. Niger', thorace aureo pubescente et vit- 

 tato, pectore cano, abdomine pilis fulvis vestito apice ferrugineo, 

 antennis nigris, pedibus rufis, femoribus hasi, tarsisque nigris, 

 alis limpidis. 



Body black : head a little narrower than the chest, thinly co- 

 vered with black hairs, thickly clothed behind and beneath with 

 white hairs, and adorned with a thick tuft of golden hairs on the 

 front and on the clypeus : eyes black ; fore part flat, but its facets 

 are hardly larger than those of the other part : eyelets dark red : lip 

 black, clothed at the tip with short yellow hairs : feelers black ; 

 first and second joints beset with short stout black hairs ; second 

 joint club-shaped, a little shorter than the first : chest clothed wiih 

 golden down, which forms a stripe on each side, and a middle 



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