156 THE DIPTERA-BRACHYCERA OF TASMANIA, 



Male. Face and front black, with grey tomentum ; 

 moustache yellowish. Thorax red, with a black anterior 

 dorsal stripe, and small black spots on shoulders and at 

 base of wingsi; scutelhim black. Abdomen violet-black 

 or greenish-black, with a little white pubescence at sides. 

 Legs black. Wings with tho basal half brownish-black, 

 the apical half hyaline. 



This species is at once distinguished from ('. jniJcliella 

 by the wings having only the basal half black, instead 

 of being entirely black. 



C. ruhritJiorax appears to be generally rare. I have 

 personally only come across a single specimen, which oc- 

 curred in the bush at Bagdad on February 13, 1913. 



29. Brachyrrhopala, Macq. 



Antennae about the same length or a little longer than 

 the head ; abdomen club-shaped ; wings either hyaline 

 or partly brown or black; anterior tibiae with a terminal 

 curved spine. 



Antennae with the first joint rather longer than the 

 second, the third slightly longer than the first two joints 

 together, and provided with a. veiy small style. Thorax 

 not gibbaus (which disitinguishes the genus from Cahasa) 

 and without a stout spine on each side (which distin- 

 guishes it from Cliryso'pogon). Abdomen club-shaped, but 

 differing much in shape in the different species. Legs 

 with scattered bristles, the anterior tibiae with a terminal 

 curved spine, which is sometimes obscure. Wings with 

 the four posterior cells and anal cell open, either hyaline, 

 or more generally with brown or black markings. 



Of this genus seven or eight species are known to occur 

 in the Australian region, four of which are found in Tas- 

 mania. 



Tohle of fhe Tasmanian Species of Braclnirrhopdla. 

 J. Wings clear; abdomen and leg,^', red. Nitidus, Macq. 

 Wings partly brown. 1 



2. Wings brown on fore border, remainder hyaline. 



LiMBiPENNis, Macq. 

 Wing3 brownish, hyaline in centre. 



Fenestrata, Macq. 

 Wings with basal half brown, apical half hyaline. 



RuFicoRNis, Macq. 



Brachyrrhopala nitidus, Macq. 

 Wings clear ; thorax black ; abdomen and legs red. 

 Length. Male and female, 14-18 mm. 

 Hab. Bagdad Valley; Mount Arthur. 



