MR. WALKER ON DIPTERA COLLECTED AT MAKESSAR. 113 



border ; hind side of the discal areolet forming a right angle, and emit- 

 ting thence the stump of a vein. Length of the body 4§ lines ; of 

 the wings 9 lines. 



67- Anthrax degenera. Walk. See Vol. I. p. 15. var. Mas et 

 F(£7n. Nigra, angusta, fulvo-pilosa, capite cinereo, antennarum ar- 

 ticulo 3" conico, pectore subargenteo, abdomine fasciis duabus ventre 

 pedibus halteribusque fulvis, tarsis uigris, alis fuscis, apice margine- 

 que postico cinereis. 



Male and Female. Black, narrow, head cinereous ; 3rd joint of the an- 

 tennaj conical; arista very short; thorax with tawny hairs ; pectus silvery 

 cinereous ; abdomen with two lateral tawny stripes, which are broadest 

 in the female ; underside, legs and halteres tawny; tarsi black; wings 

 brown, long, narrow, cinereous towards the tips and along the hind 

 border ; radial vein curved towards its tip : fore branch of the cubital 

 vein slightly curved, sharply angular at its base; externo-medial 

 veins straight ; subaual and anal veins a]>proximate on the hind bor- 

 der. Male. Hind femora with black tips ; angle of the fore branch 

 of the cubital vein emitting the stump of a vein. 



Var. j3. Female. Sides of the abdomen less tawny ; wings dark brown, 

 cinereous at the tips ; fore branch of the cubital vein deeply curved, 

 with its angle emitting the stump of a vein. Length of the body 3|-5 

 lines ; of the wings 8-12 lines. 



This species is closely allied to A. fervida, and, like the two preceding 

 species, approaches the Australian group (sub-g. Neuria), which is 

 distinguished by the long wings with contorted veins. 



68. Anthr.\x proferens, n. s. Mas. Atra, angusta, abdominis la- 

 teribus basalibus albo-pilosis, alis longis atris apud marginem posticum 

 exteriorem limpidis, puncto discali albo, litura exteriore transversa 

 albida. 



Male. Deep black, slender ; head clothed with short black hairs ; an- 

 tennae and arista very short ; 3rd joint round ; abdomen with white 

 hairs on each side at the base ; wings long, deep black, limpid along 

 the exterior part of the hind border ; a white point in the discal areolet, 

 and a little transverse whitish mark at the base of the fore branch of 

 the cubital vein ; the latter deeply curved. Length of the body 4 hnes ; 

 of the wings 12 lines. 



Allied to the group of which A. hyalacra is the type. 



Geu. Systeopus, Wiecl. 



G9. Systropus sphegoides, n. s. Mas. Niger, capite albido-tes- 

 taceo, antennis apices versus lanceolatis, thorace strigis quatuor late- 

 ralibus pallide flavis, abdomine lurido basi et apicem versus nigro, 

 petiolo lougissimo, femoribus subtus tibiisque apice luridis, alis nigri- 

 cante-cinereis, halteribus albidis nigro fasciatis. 



Male. Black ; head white behind, whitish testaceous in front about the 

 LINN. PBOC. — ZOOLOGY. 8 



