LIST OF DIPTERA. 461 



Asilus Margitis, n. s., fern. Fuscus, thoracis vittis tribus pallidiori- 

 bus, lateribus pectoreque canis, abdominis segmentorum margini- 

 bus posticis albis, apice compresso nigro nitente, antennis pe- 

 dibusque nigris, tarsis basi tibiisque fulvis, alis limpidis apice 

 subfuscis. 



Head as broad as the chest, covered with hoary down, thickly 

 clothed behind and beneath with white hairs, beset behind the eyes 

 with a row of short slender black bristles; crown brown, beset 

 on each side with black hairs ; clypeus prominent, armed with long 

 white bristles and with a few black bristles : eyes reddish bronze ; 

 fore part flat, its facets larger than those of the other part : lip 

 black, clothed at the tip with short whitish hairs ; palpi black, 

 beset with black hairs ; first and second joints of the feelers black, 

 beset with black hairs ; second joint full half the length of the first : 

 chest and breast hoary : fore chest short, its ridge beset with white 

 bristles : disk of the chest dark brown, clothed with very short 

 black hairs, beset on each side and behind with black bristles, 

 adorned with three indistinct pale brown stripes : abdomen dark 

 brown, narrower than the chest and more than twice its length, ta- 

 pering from the base to the tip, thinly clothed with short black hairs, 

 beset towards the base with a few long black and white hairs and 

 bristles ; first and second segments hoary, very short ; second seg- 



, ment beset on each side with a tuft of white hairs and a few black 

 bristles ; third and following segments long, successively decreasing 

 in length ; hind borders of the segments white ; tip compressed, 

 black, shining : legs black, clothed with short whitish hairs, armed 

 with black and white spines: shanks dark tawny, piceous at the tips ; 

 feet dark tawny at the base ; foot-cushions piceous : wings colour- 

 less, slightly tinged with brown towards the tips ; wing-ribs tawny ; 

 veins black, piceous towards the base ; poisers tawny. Length of 



i the body 4 J lines ; of the wings 7 lines. 



j a. New Holland. Presented by J. Hunter, Esq. 



j Asilus Ochesius, n. s., fem. Cinereus, thoracis vittis tribus nigris, 

 abdomine fusco fasciis canis, apice compresso nigro nitente, ventre 

 cinereo, antennis pedibusque nigris, tibiis tarsisque fulvis, alis 

 subfuscis. 



Head narrower than the chest, covered with hoary down, 

 clothed behind and beneath with white hairs, beset behind the eyes 

 with very long black hairs ; crown dark tawny, beset on each side 

 with black hairs ; tubercle of the eyelets beset with black bristles : 

 front pale tawny; clypeus prominent, beset with long white and 

 black bristles: eyes reddish bronze ; fore part flat, its facets a little 



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