Descriptions of British Diptera. 153 



3. Odontomyia felina. 



Stratiomys felina, Meig. Zwei. iii. p. 145. Panzer, Fauna Germ, lviii. 22 ? 

 Musca Mycroleon, Harris, Expos, pi. xi. fig. 5. 



Head and antennae black, the hypostome with whitish hairs ; 

 thorax also black, clothed with yellow pile ; the scutellum ferrugi- 

 nous posteriorly, the spines lighter : abdomen reddish yellow, with 

 a broad black band along the back, dilated on the posterior segments, 

 and leaving only a small portion at the sides yellow : under side pale 

 green ; legs ferruginous, the wings entirely transparent, with yel- 

 low nervures. 4-4^ lines. 



Has been found in several parts of the country, but appears to be 

 uncommon. " Cardew Mire," T. C. Heysham, Esq. 



4. Odontomyia Hydropota. 



Stratiomys Hydropota, Meig. Zwei. iii. 147- 

 About the size of the preceding or somewhat larger ; the hypos- 

 tome black, the region of the mouth rufescent ; antennae entirely 

 ferruginous in the male, having the two lowest joints rufescent, 

 and the terminal one blackish in the female ; thorax shining 

 dark-brown, pretty thickly clothed with hairs, which are whitish 

 on the disk and tinged with yellow on the sides ; scutellum with 

 the margin and spines rufous, the latter small and tipped with 

 black : abdomen pale green both above and below, somewhat pellu- 

 cid, with a broad angular dorsal stripe, rather widest at the base, 

 and not extending quite to the hinder extremity : legs rufous. The 

 female has the head rufescent, with a deep black line on the fore- 

 head, the crown black, a white spot near the inner margin of the 

 eyes, and two ferruginous spots on the vertex, the dorsal stripe wi- 

 der than in the male. 5^ lines. 



Not of frequent occurrence : inhabits the vicinity of London. 



5. Odontomyia Hydroleon. 



Stratiomys hydroleon, Fabr. Meig. Zwei. iii. 148. — Musca hydroleon, 

 Linn. ; De Geer,vi. pi. 9, fig. 4 — Odontomyia hydroleon, Latr. Stephens. 



Head and thorax black, the latter with yellowish gray pubescence, 

 the former having the hypostome clothed with fine white hairs; anten- 

 nae dark-brown ; eyes green ; scutellum the colour of the thorax at 

 the base, the apex rufous, as well as the spines, which are tipped 

 with black ; the abdomen is of a clear green both above and below, 

 the middle of the back occupied by a broad deep black stripe den- 

 tate on the sides, and not reaching either the lateral or hinder edges. 

 The legs are pale ochreous, the hinder tibiae usually with traces of 

 a brown ring near the middle ; wings very clear and transparent, 

 the nervures yellow ; halteres white. In the female the head is ful- 



