ME. F. WALKER ON DIPTERA COLLECTED AT 



20. Ommatius retrahens, Walk. See Vol. III. p. 88. 



21. Ommatius platymelas, n. s, Fcem. Niger, latus, fronte aurata, 

 thoracis lateribus subauratis, scutello cinereo, abdomine subplano, 

 segmentorura marginibus posticis maculisque lateralibus trigonis 

 cinereis, tibiis rufis apice nigris, alis nigris nigricante marginatis. 



Female. Black, broad, stout ; head clothed beneath with white hairs, 

 gilded in front ; epistoma flat ; mystax extending to the base of the 

 antennae, composed of black bristles and of a few inferior white 

 bristles ; thorax slightly gilded on each side ; scutellum cinereous ; 

 pectus hoary ; hind borders of the segments and underside with cine- 

 reous tomentum, which forms triangular spots along each side ; legs 

 very robust, with black bristles ; tibiae red, with black tips ; wings 

 black, blackish towards the tips and along the hind border ; halteres 

 pale yellow. Length of the body 6 lines ; of the wings 11 lines. 



Earn. LEPTIDiE, Westw. 



G-en. Suragina, Walk. 



22. Suragina signipennis, n. s. Fcem. Nigra, thorace vittis duabus 

 lateribusque canis, abdomine cano lanceolato apicem versus com- 

 presso, femoribus apice fulvis, tibiis rufescenti-piceis, alis cinereis 

 fasciis duabus maculaque interiore nigricantibus, gutta adhuc interiore 

 nigra. 



Female. Black ; head with whitish tomentum behind and beneath ; 

 thorax with two hoary stripes, which are dilated and united hindward ; 

 sides and pectus also hoary ; abdomen hoary, lanceolate, compressed 

 towards the obtuse tip, nearly twice the length of the thorax; legs 

 long, slender ; femora with tawny tips ; tibiae reddish piceous ; wings 

 cinereous, with two blackish bands, which are united on the costa and 

 are separated obliquely hindward, second band apical; a blackish 

 elongated subcostal spot near the inner side of the first band, and a 

 black discal dot still nearer the base ; halteres yellowish towards the 

 base. Length of the body 6 lines ; of the wings 12 lines. 



Fam. BOMBYLlDiE, Leach. 



Subfam. Tiierevites, Walk. 



Gen. Theheya, Latr. 



2'i. ThbbEVA conhcita, n. s. Mas. Nigra, argenteo tomentosa, 

 thoracii disco oigro vittis duabui interlineatii canii, abdomine fasciis 



sex nigris, alis cinereis apices versus nigricante nebulosis. 

 Male. Black, with silvery lion ry tomentum ; head silvery white in 

 front ; 3rd joint of the :mlcnna: hinceolatc, nearly as long as the 1st 

 Ulll 2nd together; arista extremely short; disk of the thorax black, 



