426 LIST OF DIPTERA. 



the fourth ; sixth segment very nearly as long as the fifth ; seventh 

 segment shorter ; eighth segment still shorter ; ninth segment black, 

 a little longer than the eighth : legs red, clothed with short pale yel- 

 low hairs ; hips and trochanters black, clothed with long pale 

 yellow hairs ; thighs and shanks beset with some black spines ; 

 knees and feet black, the latter thickly armed with black spines, and 

 clothed beneath with bright tawny down ; claws black ; foot- 

 cushions pale tawny : wings with a slight tawny tinge ; wing-ribs 

 ferruginous ; veins piceous, ferruginous at the base, black towards 

 the tips ; poisers tawny. Length of the body 8 lines ; of the wings 

 14 lines. 



a. Van Dieman's Land. Presented by B. Butler, Esq. 



Asilus Barium, n. s., mas. Fuscus, thoracis vittis quinque fulvis, 

 metathorace et pectore canis, abdominis segmentorum marginibus 

 posticis fulvis, apice nigro, ventre cinereo, antennis pedibusque 

 fulvis^femoribus et tibiis apice tarsisque nigris, alis limpidis di- 

 latatis, apice cinereis. 



Body brown : head nearly as broad as the chest, covered 

 behind with hoary down, and clothed there and beneath with white 

 hairs ; crown and front covered with tawny down ; clypeus promi- 

 nent, armed with long white bristles : eyes bronze ; fore part slightly 

 convex, its facets rather larger than those of the other part : lip 

 black, clothed at the tip with short tawny hairs ; palpi black, beset 

 with long black hairs: feelers tawny; first and second joints beset 

 with short stout black hairs ; second joint much less than half the 

 length of the first ; third joint spindle-shaped, much shorter than 

 the first; bristle black, more than twice the length of the first joint: 

 chest dark brown, beset on each side and behind with a few black 

 bristles, adorned with five pale tawny stripes ; middle stripe indis- 

 tinct, except in front ; inner-side stripes joined in front to the outer 

 stripes, the latter are connected by three oblique tawny bands with 

 the sides of the chest, which are also pale tawny ; breast and hind 

 chest hoary : abdomen brown, thinly clothed with pale yellow hairs, 

 very much narrower than the chest, and about twice its length, 

 slightly tapering from the base to the tip ; hind borders of the seg- 

 ments tawny ; under-side gray ; first and second segments very 

 short ; third and following segments long, but successively decreas- 

 ing in length to the tip, which is black and shining : legs bright 

 tawny, clothed with black and tawny hairs, armed with black spines ; 

 hips gray ; tips of thighs and of shanks black ; feet black, tawny at 

 the base ; foot-cushions tawny : wings colourless, gray towards the 

 tips, much widened from the middle to the tips, the fore borders 



