152 Descriptions of British Diptera. 
species are sufficiently dissimilar to be entitled to a distinctive name. 
The larvae, one of which is figured and described by De Geer, are 
aquatic, and seem in no respects to differ from those of Stratiomys. 
1. ODONTOMYIA ARGENTATA. 
Stratiomys argentata, Fabr. Meig. Zwei. iii. 141 Panzer, Fauna Germ. 
Ixxi. fig. 20 , cviii. fig. 10 ? Odontomyia argentata, Latr. 
Head and antennae black, eyes greenish with a purple fascia, the 
forehead clothed with shining silvery hairs ; thorax and scutellum 
dark-brown, with brownish-yellow pile, the scutellar spines small 
and inconspicuous ; abdomen black, clothed throughout with silvery 
hairs, having a bluish tint, with an acute triangular yellow spot on 
each side of the second and third segment, and the anus likewise 
of that colour ; under side black slightly tinged with green : 
wings vitreous, the nervures and a small spot near the middle of the 
costa brown ; legs of the latter colour, the tibiae ferruginous, with a 
brown mark near the middle. 
The female differs chiefly in having the body of a deeper black 
and clothed throughout, except on the sides of the abdomen, with 
pile of a golden-green colour. 4J lines. 
Rare ; has been found in the vicinity of London, and indigenous 
specimens are preserved in the British Museum, and likewise in the 
cabinet of the Rev. Mr Kirbyj, now in the possession of the Ento- 
mological Society of London. " Cambridge, 1832." Charles C. 
Babington, Esq. 
2. ODONTOMYIA ORNATA. (s ) 
Odon. furcata, Meig. Klassif. i. 129, pi. vii. fig. 22. Latr. Gen. Crust, iv. 
Reaumur, iv. pi. 24, fig. 4-7 ? 
Eyes green and unspotted ; antennae and hypostome dark brown, 
the latter with yellowish hairs ; thorax and scutellum dark brown, 
clothed with rufescent hairs, the scutellum margined with reddish- 
yellow, and the spines likewise of that colour, with the tip black ; 
abdomen black above, and somewhat glossy ; with fulvous triangular 
spots on the sides, and the anal segment edged with fulvous ; the 
under side pale, having a pair of dusky spots on the third and fourth 
segments ; legs ferruginous, the basal half of the thighs black, and 
the tibiae and tarsi more or less spotted with brown ; wings transpa- 
rent, the nervures yellowish. In the female the legs are entirely 
ferruginous, and the forehead of the same colour, with a black line 
in the middle, and a spot on each side. 6-7 lines. 
In spring and summer, occasional. Occurs in Roxburghshire and 
near Edinburgh. " Near London," Stephens? s Catal. " Dalmeny," 
Rev. William Little, 
