Descriptions of British Diptera. 153 
3. ODONTOMYIA FBLINA. 
Stratiomys felina, Meig. Zwei. iii. p. 145. Panzer, Fauna Germ. Iviii. 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 j 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. 5J 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,\i. 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, whrch are tipped 
with black j 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- 
