DIPTERA. 359 



(E. bovis, De Geer ; Clarck., Lin. Trans., Ill, xiii, 1, 6. 

 From six to seven lines in length, and densely pilose ; thorax 

 yellow, with a black band ; abdomen white at base, with a ful- 

 vous extremity ; wings somewhat obscure. 



The female deposits her eggs under the hide of healthy Oxen 

 and Cows, of not more than two or three years of age. The 

 consequence of this operation are tumours or lumps, on the in- 

 ternal pus of which the larvae feed. Horses also are subject to 

 them. 



The Rein-Deer, Antelope, Hare, &c., also nourish various 

 larvae of CEstri, but of a different species. 



CE. ovis, L. ; Clarck, Lin. Trans., HI, xxxii, 16, 17. Five 

 lines in length, and but slightly pilose ; head greyish ; thorax 

 cinereous, with elevated black points; abdomen yellowish, finely 

 spotted with brown or black ; legs pale-brown ; wings transpa- 

 rent. 



The larvae inhabits the frontal sinus of the Sheep. That of 

 the species called trompe. Fab., is found in the same parts in 

 the Rein-Deer. 



CE. cqui, Lat. ; Clarck, Ibid., xxxiii, 8, 9. But slightly pilose, 

 and of a fulvous-brown ; abdomen paler ; two points and a band 

 on the wings, black. 



The female deposits her ova on the legs and shoulders of 

 Horses ; the larvae inhabit their stomach. 



(E. hcemorrhoidalis^ld.; Clarck, Ibid., 12, 13. Densely pi- 

 lose ; thorax black, with a pale yellow scutellum ; abdomen 

 white at base, black in the middle, and fulvous at the end ; wings 

 immaculate. 



The female deposits her eggs on the lips of Horses, and the 

 larvae live in their stomach. 



CE. veterinus, Clarck, Ibid., 18, 19. Completely covered 

 with russet hairs ; those on the sides of the thorax and base of 

 the abdomen, white ; wings immaculate. 



The larva inhabits the stomach and intestines of the same 

 animal. It is possible that the female may deposit her ova on 

 the margin of the anus. 



The third tribe of the Athericera, that of the Conopsari^, is the 

 only one of that family in which the proboscis is either always salient 

 and siphoniform, cylindrical or conical, or setaceous. The reticula- 

 tion of the wings is the same as in our first division of the Muscides. 



Most of these Insects are found on plants. They form the genus 



CoNGPS, Lin. 



In some the body is narrow and elongated, the abdomen clavate, 

 curved underneath, and with the male organs of generation salient. 

 The second joint of the antennae is at least almost as long as the 



