AUophora. 91 



strengest in female. No orbital bristles. Beliind postocular bristles 

 no black Iiairs or the occipiit quite black-haired. Frontal bristles 

 fine, reaching to lunula or longer down to the insertion of antennæ, 

 all Crossing in both sexes. Orbits densely haired or bare. Cheeks 

 bare. Ptilinal suture and vibrissal ridges short, stopping above lower 

 margin of epistoma; the vibrissal ridges (space between the inner 

 ridge and the ptilinal suture) sometimes rather widening downwards. 

 Vibrissæ somewhat ascending, often about to the middle; a large 

 vibrissa not or more or less distinct, placed above lower margin of 

 epistoma; when not distinct the vibrissal angle slightly pronounced, 

 the upwards curved oral margin passing evenly into the vibrissal 

 ridge. Epistoma not retreating, but the lower part more or less pro- 

 truding and it is arched transversally. The oral side margin curves 

 upwards anteriorly to the vibrissal angle. Oral bristles short and 

 fme hairs, only stronger anteriorly on the upwards curved part of 

 the margin. Oral cone and proboscis shorter or longer; palpi thread- 

 like or slightly dilated at apex. Antennæ inserted about at the middle 

 of the eye or somewhat above; they are somewhat distant at base, 

 short, third joint slightly longer than second; arista nearly bare, 

 second joint short. Thorax from a little broader than long to a little 

 longer than broad ; of bristles only four along hind margin. Scutellum 

 with two small marginal bristles on each side. No or one sternopleural 

 bristle. Abdomen oval, more or less broad, rather flat; excavation 

 on second segment reaching about half way to hind margin; sixth 

 dorsal segment more or less visible above. No bristles. Male genitalia 

 somewhat large, bent in under venter, the præhypopygial segment 

 more or less elongated. The female abdomen ending with a strong 

 claw-like, backwards directed ovipositor, fitting in a sheath of a 

 similar shape. Legs not long, with only few bristles; ventral bristle 

 on middle tibiæ present in both sexes or only in female; claws and 

 pulvilli in male strongly or less to only slightly elongated. Sometimes 

 the front tarsi in male dilated. Wings rather broad, in most species 

 specially broad and dilated in male with anterior margin curved 

 out; first posterior cell short- to long-petiolate, ending at apex of 

 wing; discai angle rounded, the apical cross-vein sloping or steep, 

 and thus the upper apical angle of first posterior cell acute or rect- 

 angular. No or quite minute bristles at base of cubital vein. No 

 costal spine. 



In most species of the genus the male and female are rather. 

 different in colour, and the female is smaller than the male and has 



