■]«)« ;.liiiic. 



from tlie posterior radius to the postical, arranged in an 

 angulate or zigzag line with one another; eubcosta, cubitus, 

 prsebrachial and anal nervures without bristling hair... 



Species No. 16, Brit. 



A. A. Ending of the bristling hair on the anterior radius near the wing- 

 margin some distance beyond the end of the subcosta ; its 

 endings on other nervures, from the posterior radius to the 

 postical, arranged in a curved line with one another ; subcost a, 

 cubitus, prsebrachial, posterior pobrachial and anal nervules 

 without bristling hair ... Species Nos. VII, Alg. ; 17, Brit. 



** Antennse 16-jointed in both sexes. Cubitus provided with some bristling hair. 



t Bristling hair in parts of the wing extended bejoiid the shortest line from 

 the end of the subcosta to the end of the anal nervure. 



B. First joint in the <? antennce longer than the next two joints together ; 



2nd joint very stout, pyriform, with a tuft of long spiiiiform scales 

 projecting on one side beyond its apex ; 3rd joint much smaller, 

 partially hidden by the shorter scales of the 2nd joint, ovoid with 

 a short beak, resembling and subequal to the 4th joint, but with 

 a less widely spread verticil of hairs ; articular appendages of the 

 flagellum setiform, flattened and almost drepanoid or subspivally 

 curved half a turn. Wing pointed exactly at the end of the 

 prsebrachial nervure ; bristling hair extended farthest upon the 

 posterior radius ; its endings on this and other succeeding ner- 

 vures to the postical arranged almost transversely in a gently 

 curved salient line with one another ; subcosta, prsebrachial and 

 anal nervures without bristling hair. Pupal spiracular nipples 

 persistent in the shape of a pair of claviform appendages to the 

 thorax of the $ fly, inserted anteriorly one on each side on a level 

 with the insertion of the antennse... 



Species Nos. VIII, Alg. ; 18, Brit. 



C. First joint in the <J antennse subequal to or barely longer than the 



next two together ; 2nd joint globular. 



c. Bristling hair extended subequally and farthest upon the posterior 

 radius, cubitus and anterior pobrachial ; its ending on the 

 anterior radius subopposite the end of the subcosta ; subcosta, 

 prsebrachial and anal nervures without bristling hair ; apex 

 of the wing ellipsoidal or subacute between the cubitus and 

 the prsebrachial nervures. Third joint in the $ antenna 

 similar and subequal to the 4th joint, bulbose, with the beak 

 subequal in length to the bulb. 



C-. Endings of the bristling hair on nervures posterior to the 

 prsebrachial arranged in a very oblique curved line with 

 one another. Third joint in the $ antennce furnished 

 with a moderately ample campanulate verticil of hairs ; 



