166 Mr. R. E. Turner on the 



clypeus ; posterior ocelli twice as far from the eyes as from 

 each other. Antenna? about 50-jointed, second joint of the 

 flagellum fully three times as long as the first. A large 

 curved depression, longitudinally striated, at the base of the 

 scutellum. Thorax and median segment smooth and shining. 

 Abdomen smooth and shining, the valvulre clothed with 

 short hairs. Spiracle of the median segment small and 

 round. 



Hab. Victoria (F?-ench), ex coll. Turner. 



A variety in the British Museum collection without data 

 has the prothorax and mesonotum red and measures 18 mm. 

 in length. This may prove to be distinct or a local race. 

 The length of the second abscissa of the radius seems to be 

 variable in this species. 



Austrohelcon, gen. nov. 



Very near the genus Gymnoscelus, Forst., differing in 

 having only one transverse nervure in the anal cell of the 

 fore wing instead of two, and the second transverse cubital 

 nervure straight, forming a right angle with the cubitus, not 

 oblique. The genus Edyia,CsLm,, from Borneo, is somewhat 

 intermediate between the two genera, having the second 

 cubital cell as in Gymnosceltts, but the second transverse 

 vein of the anal cell almost obsolete. The frontal excavation 

 is shallower and less sharply defined than in Gymnoscelus and 

 Edi/ia. The nervulus in Edyiaand Austrohelcon is distinctly 

 postfureal, not interstitial as in Gymnoscelus. 



Type of genus, A. meridionalis, Turn. 



Key to the Species of Austrohelcon. 



Head black ; tlrorax almost entirely rufo- 



testaceous 2. 



Thorax almost entirely black 4. 



Joints 2-4 of the bind tarsi yellowish 



white 3. 



Third and fourth joints of the hind tarsi 



only whitish A. australiayms, Koknj. 



Pronoturu, base of scutellum, and the 



middle of the mesosternnm black. ... A. indultor, Erichs. 



Thorax entirely rni'o-testaceous A. inornatus, Kokuj. 



Head, except the ocellar region, red .... A. erythrocephalus, Turn. 



Head black A. meridionalis, Turn. 



