AUSTRO-MALAYAN DIPTERA 453 



witli metallic, bluish or greenish, reHections, white front tarsi 

 and wings banded with brown. They are common in the war- 

 mer regions of the old and new world ; Macquart assumed 

 even the specific identity of some specimens from North- Ame- 

 rica , Cuba, Java and Australia (C. alhimana Macq.) , and that 

 of C. tarsata Wied. (Brazil), with specimens from New-Guinea. 

 Closely resembling species seem to be numerous, and as speci- 

 mens collected in the same island often agree among themselves 

 in the deviations which they show, it becomes difficult to de- 

 cide whether to consider them as local varieties or as distinct 

 species. Without attempting to unravel M.'' Walker's numerous 

 descriptions in this genus, I will characterize five species, which 

 I recognize in the collection before me , and will name three 

 of them , whithout reference to earlier descriptions. None of 

 these species has the well-marked sericeous silvery or golden 

 stripe on the pleurae, in front of the root of the wings, which 

 characterizes some species from the Philippine Islands. 



The distance of the posterior crossvein from the apex of the wing is 

 more than twice the distance of the end of the second vein to the same 

 apex; wings narrow, with three brown crossbands and a brown apex. 



tipuloides Walk. 



The distance of the posterior crossvein and of the end of the second 

 vein from the apex of the wings is nearly the same; wings with only one 

 or two brown crossbands, besides the brown apex. 



Front coxae and proximal third of front femora yello- 

 wish-red : mentum yellow : first posterior cell much coarc- 

 tate , but not closed ; wings with a single crossband , 

 besides the brown apex ; a velvet black spot on the front, 

 and another one on the vertex, behind the ocelli. 



Tip of hind femora red alhimana Dol. 



Tip of hind femora black prudens n. sp. 



Front coxae and front femora black ; mentum black ; 

 first posterior cell closed; two crossbands on the wings, 



