BY FREDERICK A. A. SKUSE. 669 



The following is a tabulation of the Australian species of 

 Sciara. 



I. First longitudinal vein joining the costa opposite or 



BEYOND THE BASE OF THE FORK. 



(Nos. 96 to 99). 



A. Halteres black or brown, the stalk wholly or partly yellow, 

 yellowish or whitish. 



(Nos. 96 to 98). 



1. Palpi black or brown. 



(Nos. 96 to 98). 



A. Cross-vein situated befoi-e the middle of the first longitudinal 

 vein. 



a. Tijy of the second longitudinal vein nearer the apex of the 

 vnng tlian the tip of the posterior branch of the fork. 



(No 96). 



C. Cross-vein situated beyond the middle of the first longi- 

 tudinal vein. 



c. Tip of the posterior branch of the fork nearer the apex of the 

 wing than the tip of the second longitudinal vein. 



(Nos. 97 and 98). 



B. Halteres yellow or whitish. 



(No. 99). 



II. First longitudinal vein joining the costa before the 



BASE OF THE FORK. 



(Nos. 100 to 136). 



A. Halteres black or brown, the stalk wholly or partly yellow, 

 yellowish or whitish. 



(Nos. 100 to 134). 



1. Palpi black or brown. 



(Nos. 100 to 122). 



