466 LIST OF DIPTERA. 



chest, rather more than twice its length in the male, and about 

 thrice its length in the female, tapering from the base to the tip, 

 compressed and lengthened towards the tip in both sexes, clothed 

 with short black hairs and with a few long whitish hairs, the latter 

 are chiefly towards the base and on the under-side ; first and second 

 segments short ; third and following segments long : legs dark fer- 

 ruginous, clothed with short black hairs, armed with black spines; 

 feet black ; foot-cushions piceous : wings whitish, brown at the tips ; 

 wing-ribs piceous ; veins black, piceous towards the base ; poisers 

 tawny. Length of the body 6% — 10 lines; of the wings 12 — 15 

 lines. 



Var. /3. Thighs black. 

 a. Colenso, New Zealand. Presented by Dr. Hooker. 



Asilus Lascus, n. s., mas. et fem. Fuscus, thoracis vittis tribusful- 

 viS) pectore cano, abdomine piceo, fem. apice compressor antennis 

 nigris, fem. fulvo cinctis, pedibus piceo-fulvis, alis subfulvis, 

 apicibus marginibusque posticis cinereis. 



Body slender, brown : head as broad as the chest, covered with 

 dark tawny down, beset behind the eyes with a few black bristles, 

 thinly clothed beneath with whitish hairs ; clypeus armed with long 

 white bristles : eyes bronze ; fore part nearly flat, its facets larger 

 than those of the other part ; lip black, clothed at the tip with short 

 white hairs ; palpi black, beset with long black hairs : feelers black ; 

 first and second joints beset with a few black hairs ; second joint 

 slightly club-shaped, tawny in the female, rather more than half the 

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

 long as the first and the second, tawny at the base in the female ; 

 bristle stout, rather more than half the length of the third joint : 

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

 adorned with three incomplete tawny stripes ; sides also tawny : 

 breast hoary : abdomen piceous, narrower than the chest, and more 

 than twice its length, clothed with tawny hairs, slightly tapering 

 from the base to the tip ; first and second segments very short ; 

 third and following segments long, successively decreasing in 

 length ; sexual parts of the male small ; tip of the female com- 

 pressed : legs dull tawny, clothed with short tawny hairs, armed 

 with long tawny bristles ; thighs and shanks striped with piceous 

 colour, especially towards the tips ; feet piceous, tawny at the base ; 

 claws black ; foot-cushions tawny : wings light tawny, gray at the 

 tips and along the hind borders ; wing-ribs piceous ; veins black, 

 piceous at the base ; poisers tawny. Length of the body 5 — 6 

 lines ; of the wings 9 — 11 lines. 



a. Colenso, New Zealand. Presented by Dr. Hooker. 



