254 DIPTEBOTJS INSECTS COLLECTED AT DOBET. 



the tip with two erect forceps- like appendages ; legs very slender ; 

 posterior legs very long ; posterior femora tawny ; wings blackish, 

 cinereous along the hind border ; veins black ; cubital and prajbrachial 

 veins very slightly converging towards each other ; postbrachial vein 

 very near the prsebrachial ; discal transverse vein parted by about its 

 length from the border, and by about six times its length from the 

 praebrachial transverse ; halteres testaceous. Length of the body 5 

 lines ; of the wings 7 lines. 



Gren. Nebius, Fair. 



77. Nerius duphcatus, Wied. See vol. iii. p. 125. 



"JS. Nerius MANTOiDES, n. s. Mas. Piceus, capite subtus pectoreque 

 ferrugineis, arista albida, pedibus fulvis, femoribus anticis subserratis, 

 tibiis anticis apice dilatatis, alis fuscescenti-cinereis. Fcem. Obscu- 

 I'ior, pedibus piceis simplicibus. 



Male. Piceous ; head beneath and pectus fen-uginous ; 3rd joint of the 

 antennae lanceolate ; arista whitish, apical ; abdomen shorter than the 

 thorax ; legs tawny, long, stout ; fore femora slightly dilated, minutely 

 serrated beneath ; fore tibiae dilated towards their tips; wings brownish 

 cinereous; veins black; cubital and prsebrachial veins converging 

 towards each other exteriorly ; discal transverse vein oblique, parted 

 less than its length from the border, and by more than twice its 

 length from the praebrachial transverse ; halteres tawny. Female. 

 Darker than the male ; legs piceous, simple. Length of the body 

 A-A^ lines ; of the wings 7-8 lines. 



This species may be distinguished by its wings from N. tibialis, which it 

 resembles in structure. 



Pam. HIPPOBOSCID^, Leach. 

 Gen. Obnithomtia, Olfers. 



79. Ornithomyia Doreica, n. s. Fcem. Picea, capite thoracis la- 

 teribus anticis pectore pedibusque pallide viridibus, femoribus tibiis- 

 que piceo vittatis, tarsis piceis, alis cinereis. 



Female. Piceous, shining, with black bristles ; head, pectus, and legs 

 pale green ; sides of the thorax in front pale green, including a piceous 

 spot ; femora and tibiae striped with piceous ; tarsi piceous ; wings 

 cinereous ; veins black, very strongly marked. Length of the body 

 'S^ lines ; of the wings 9 lines. 



80. Ornithomyia exilis, n. s. Picea, capite pedibusque obscure vi- 

 ridibus, alis cinereis. 



Piceous, shining ; head and legs dull green ; wings cinereous ; veins 

 black. Length of the body \\ line ; of the wings 3 lines. 



8L Ornithomyia plana, n. s. PaUide viridis, alis cinereis. 

 Pale green; claws black ; wings cinereous; veins black. Length of the 

 body 2 lines ; of the wings 4^ lines. 



