434 LIST OF DIPTERA. 



decreasing in length ; third segment crossed by two rows of black 

 punctures ; tip shining, compressed ; under-side piceous : legs black, 

 clothed with short black hairs, armed with black spines ; shanks very- 

 dark tawny, black towards the tips ; foot-cushions piceous : wings 

 dark brown, blackish along the fore borders, paler towards the hind 

 borders, where the disks of the areolets are almost colourless : wing- 

 ribs and veins black ; poisers tawny. Length of the body 10 j lines ; 

 of the wings 18 lines. 



a, Brazil. 



Asilus Peticus, n. s. fern. Ferruginens, thoracis disco nigro vittis 

 tribus ferrugineis, abdomine piceo apice nigro compresso, anten- 

 nis pedibusque nigris, tibiis ferrugineis, alis fuscis. 



Head as broad as the chest, covered with tawny down, beset be- 

 hind the eyes with some black bristles and pale yellow hairs, more 

 thickly clothed beneath with white hairs ; crown covered with dark 

 ferruginous down, beset on each side with black hairs ; clypeus very 

 prominent, armed with long stout black bristles, and in front with 

 a few long white hairs : eyes dark bronze ; a small portion of the 

 forepart flat, and composed of much larger facets than those of the 

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

 palpi black, clothed with long black hairs : feelers black ; first and 

 second joints clothed with black hairs ; second joint not half the 

 length of the first ; third joint tapering from the base to the tip, 

 nearly as long as the first ; bristle much longer than the third joint: 

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

 with black bristles, adorned with three ferruginous stripes ; each 

 side stripe connected by an oblique ferruginous band with the sides 

 of the chest, which like the breast, are also ferruginous : abdomen 

 piceous, narrower than the chest, and about twice its length, clothed 

 with ferruginous hairs, tapering from the base to near the tip, which 

 is compressed, black, and shining ; first and second segments very 

 short, arched, covered on each side with a few long black bristles ; 

 third and following segments long, successively decreasing in 

 length ; under-side tinged with gray : legs black, clothed with 

 black hairs, armed with black spines and bristles ; shanks very dark 

 ferruginous ; foot-cushions piceous : wings dark brown ; wing-ribs 

 and veins black ; poisers tawny. Length of the body 10J lines ; of 

 the wings 18 lines. 



a. Brazil. 



Asilus iopterus, Wied. Auss. Zweif. i. 438, 21. 

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



