20 



MR. F. "WALKER OK DIPTERA COLLECTED AT 



tinged here aiid there with cupreous ; abdomen cupreous, with the 

 1st segment and a slender stripe deep black; the following segments, 

 which are black along their hind borders, bluish green ; legs black ; 

 wings brownish cinereous, tinged with brown near the base ; pra> 

 brachial vein forming a rounded right angle at its flexure, very slightly 

 curved inward from thence to its tip ; discal transverse vein slightly 

 undulating, parted by less than one-third of its length from the border, 

 and by very much more than its length from the flexure of the prae- 

 brachial. Length of the body 7\ lines ; of the wings 1 7 lines. 



Subfam. Mttscides, Walk, 



Gen. Musca, Linn. 



12. Musca promittens, Walk. See Vol. IV. p. 134. 



Subfam. Ortalides, Ilaliday. 



Gen. Platystoma, Latr. 



13. Platystoma potens, Walk. See p. 12. 



C E R A M. 

 Fam. STEATIOMIDtE, Haliday. 



Gen. Pttlocera, Wied. 



1. Ptilocera 4-dentata, Fabr. See Vol. I. p. /. 



Gen. C ltte ll aria, Meigen. 



2. Clitellaria obesa, Walk. Sec Vol. V. p. 232. 



Fam. TABANID^E, Leach. 



Gen. Tabanus, Latr. 



3. Tabanus serus, n. s. Fa?m. Cinereus, capite subtus pectoreqne 

 alhis, antennis fulvis apice nigris, thorace vittis duabus ferrugineis, 

 callis humcralihus testaeeis, abdornine pedibusque fulvis, alis cincreis 

 apud costam fnscis. 



Female. Black, with cinereous tomcntum ; head beneath and pectus 

 white j callus black, very slender, broader in front; palpi cinereous ; 

 antenna: tawny with cinereous tomcntum towards the base, 3rd joint 

 slightly curved, black towards the tip, with a very small horn; thorax 

 with two ferruginous tomentose stripes; humeral calli testaceous; 

 abdomen tawny, elongate-conical; legs tawny; tarsi black; wings 

 cinereous, brown along the COStfl ; veins black, with the usual struc- 

 ture, tawny at the base j halterei pale. Length of the body f) lines; 

 of the wings 12 lines. 



