LIST OF DIPTERA. 401 



Asilus Dascyllus, n. s. Fuscus, pectore cinereo, antennis nigris, pe- 

 dibus piceis, tibiis ferrugineis apice piceis, alis albidis. 

 Body brown: bead covered witb boary bloom, a little narrower 

 tban the cbest, tbickly clothed beneath witb very long goldeD hairs j 

 bind part thinly clothed with short white hairs, and beset with 

 black and tawny bristles ; crown beset on each side with black 

 bristles ; clypeus large, prominent, very thickly clothed with long 

 golden hairs, and beset in front with a few black bristles: eyes dark 

 bronze ; fore part slightly convex, its facets larger than those of the 

 other part : lip black, clothed at the tip with short pale yellow hairs ; 

 palpi black, beset with black bristles: feelers black : first and second 

 joints beset with short black bristles ; second joint not half the 

 length of the first; third joint elliptical, shorter than the first: chest 

 thinly clothed with short black hairs, beset on each side and behind 

 with some black bristles : breast tinged with gray, partly clothed 

 with long hoary hairs : legs piceous, clothed with long yellow hairs, 

 armed witb black spines, which are very thick on the feet ; shanks 

 ferruginous, piceous towards the tips ; claws black ; foot-cushions 

 tawny ; shanks and feet covered beneath with pale ferruginous down : 

 wings whitish ; wing-ribs and fore border veins ferruginous ; the 

 other veins piceous. Length of the body 8? lines ; of the wings 12 

 lines. 

 a. Massachusetts. From Prof. Sheppard's collection. 



Asilus virilis ? Wied. Auss. Zweif. i. 468, 65. Erax virilis, Macq. 



Dipt. Exot. i. 2, 113, 14. 

 a. ? 



Asilus obscurus. Erax obscurus? Macq. Dipt. Exot. i. 2, 112, 



12. 

 a. Para. Presented by J. P. George Smith, Esq. 



Asilus Bastardi ? Macq. Dipt. Exot. i. 2, 117, 25, pi 9,/. 7. 

 a. Brazil. 



Asilus Bardyllis, n. s., fem. Ferrugineus, thoracis vittis quatuor 

 nigris, abdomine nigro, segmentorum marginibus posticis fulvis, 

 antennis pedibusque nigris, tibiis alisquefulvis, 

 Fem.— Head piceous, as broad as the chest, mostly covered with 

 ferruginous down above, and with pale yellow down beneath, clothed 

 with bright yellow hairs behind and beneath, beset behind the eyes 

 with black bristles ; tubercle of the eyelets armed with two black bris- 

 tles ; crown covered with black hairs on each side ; front and clypeus 

 adorned with pale golden down, the latter very prominent, beset with 

 yellow hairs and black bristles : eyes dark bronze ; fore part slightly 



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