384 IXSECTA. 



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*. 



Ornithomi'ia, Lat., 

 Only differing from Hippobosca in the anteimse, 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. Feronia — Nirmomyia, Nitzsch — dis- 

 tinguished from the folloAving ones by the tubercular form of the 

 antennae, and by the nails of the tarsi having but two teeth in lieu 

 of three. 2. Ornithomyia, in which, as in the thiee following sub- 

 genera, there are ocelli and tridentated nails, and, as in the two which 

 succeed, laminiform antennae, but where the wings are almost equally 

 wide and rounded. 3. Stenepteryx, similar to Feroniae, with the 

 exception of the wings, which are narrow and very acute. 4. Oxyp- 

 TERUM, where the wings are equally acute ; but the antennae 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. f 



Strebla, 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. On a Bat of South America J. 



Melophagus. — Melophila, Nitx., 

 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 Lipotena of Professor Nitzsch. Near 

 the Melophagi should probably be placed his genus Braula — 

 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., Ibid. ; Encyc. Method., article Ornithomyie, Leach. The eyes of the Or- 

 nithomyiae 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. 



X Dalm., Anal. Entom. 



§ Lat., Ibid., and Leach. 



