384 INSECTA, 
H. equina, L.; De Geer, Insect, VI, xvi, 1—20. Brown 
mixed with yellowish. Found on Horses and Oxen, usually 
under their tail and near the anus *. 
OrnitHomyi, Lat., 
Only differing from Hippobosca in the antenne, which project, are 
laminiform and pilose, and in the wings, which are furnished poste- 
riorly with strongly marked longitudinal nervures that extend to the 
posterior margin. 
These Insects, in the Monograph of the Diptera, published by Dr, 
Leach, form four genera. 1. Frronta—Nirmomysa, Nitzsch—dis- 
tinguished from the following ones by the tubercular form of the 
antenn, and by the nails of the tarsi having but two teeth in lieu 
of three. 2. Orniruomyia, in which, as in the three following sub- 
genera, there are ocelli and tridentated nails, and, as in the two which 
succeed, laminiform antenne, but where the wings are almost equally 
wide and rounded. 3. Srenepreryx, similar to Ferconiz, with the 
exception of the wings, which are narrow and very acute. 4. Oxyp- 
TERUM, where the wings are equally acute; but the antenne are den- 
tiform, the eyes are small, and the ocelli are wanting, as in Hippo- 
bosca and Feronia. 
They live on various birds, such as the Swallows, Titmouse, and 
even on the Vulture. 
O. verte; Hippobosca avicularia, L.; De Geer, Insect., VI, 
xvi, 21—24. Green; top of the thorax black ; proboscis pro- 
jecting ; wings almost oval. On the Sparrow, &c. ¢ 
Stresia, Dalm., 
Differing from Ornithomyia in the wings, which are crossed on the 
body, and of which some of the longitudinal nervures are united by 
small transversal ones, The eyes are very small and situated on the 
posterior angles of the head. Ona Bat of South America t. 
MeE.opuacus.—MeE opuina, Nitz., 
Destitute of wings, and where the eyes are rather indistinct. 
M. vulgaris; Hippobosca ovina, L.; Panz., Faun. Insect. 
Germ., LXI, 14. Reddish. It conceals itself in the wool on 
Sheep. Another species is found on the Stag §. 
A species of Melophagus that lives on the Stag, that presents 
rudiments of wings, and whose thorax is rather wider than the 
head, forms the subgenus LreorEna of Professor Nitzsch. Near 
the Melophagi should probably be placed his genus Brauta— 
Germ., Magus. der Entom.—of which the only known species 
lives on the domestic Bee. It is figured by M. Germar, Faun. 
* See Lat., Gen. Crust. et Insect., IV, p. 362; Leach, Dufour, &c. 
+ Lat., Tbid.; Encye. Méthod., article Ornithomyic, Leach. The eyes of the Or- 
nithomyiz appear to me to be somewhat smaller than in Hippobosca. The sides of 
the thorax terminate anteriorly in a point. The sucker originates from a little 
piece emarginated like a heart, which is not exposed in Hippobosca. 
+ Dalm., Anal. Entom,. 
§ Lat., Ibid., and Leach. 
