Descriptions of British Diptera. 151 



Once taken near Duddingston ; likewise found in the vicinity of 

 London, and in other parts of England. 



5. Stratiomys strigata. (s.) 



Stratiomys strigata, Fabr ,■ Meig. iii. 139 — Musca strigata, Gmelin Hir- 



tea longicornis, Scopoli, Ent. Car — Musca tenebricus, Harris, Expos. 

 pi. xi. fig 3 ? ? 

 Readily distinguished from any of the preceding by having the 

 surface of the abdomen entirely black : head, thorax, and scutellum 

 brownish-black, clothed with tawny hairs ; the spines of the latter 

 small and yellow : eyes greenish, pubescent, with two purple fas- 

 ciae, the anterior one very narrow ; antennae black : abdomen black, 

 thinly clothed with tawny hairs, the under side with three narrow 

 yellowish-white bands narrowed to a point at each side, and placed 

 on the hinder margin of the segments : thighs brown ; tibiae yellow 

 with a brownish ring near the middle and another at the apex : the 

 tarsi tinged with brown. 



The female differs in having a yellow triangular spot between the 

 eyes and another on the hinder part of the head ; the pubescence 

 on the latter is light-coloured, and on the sides of the abdomen it is 

 nearly pearl-white. o'-7^ lines. 



Apparently occurring more frequently in Britain than any of the 

 preceding species. " Near London," Stephens's Catal. " New 

 Forest," /. C. Dale, Esq.* « Raehills," Rev. William TAttle. 



Besides the above species, Mr Stephens possesses another true 

 Stratiomys, which he names S. triangulata, the characters of which 

 have not been published. 



Genus ODONTOMYIA, Meig. 



Antennae longer than the head, the two first joints short and near- 

 ly of equal length, the third elongate and conical, divided into five 

 distinct rings, the apex compressed and narrowed into a short style : 

 proboscis rather slender ; the labrum narrow and elongate ; scutel- 

 lum with two spines ; eyes of the male with the facettes much 

 larger on the upper than on the under side. 



In its other characters this genus scarcely differs from the preceding. 

 The two groups, indeed, are so closely allied that Meigen has latter- 

 ly included both in his genus Stratiomys. This he has probably been 

 induced to do by observing that the antennae of O. microleon and 

 0. argentala are of a structure nearly intermediate between the ty- 

 pical form of Stratiomys and Odontomyia, the first joint being a good 

 deal longer than the second. With this exception, however, the 



* Loudon's Mag. Nat. Hist. iv. p. 265. 



