OESTRUS. 81 



the stomach. The larvae attain their full growth 

 by the end of May, and continue dropping 

 from the horse the whole of June. As soon 

 as they reach the ground, they find out some 

 convenient retreat, and change to the chrysalis, 

 and in about six or seven weeks the fly appears. 



SPECIFICATION. 



Oestrus equi. Oe. alis albidis, fascia punctisque 



duobus nigris, abdomine to to ferrugineo. Fahr. 



Syst. Anil, p. 228. Clark, Trans, of the Linn. Soc. 



3. p. 326. £.23./. 8,9. 



Oestrus Bovis. Linn. Syst. Nat. 1. p. 969. Gmel. 1. 



p. 2809. 

 Inhabits Europe, and is found in pastures in the 

 months of July and August. 

 PL 63. a. The male. b. The female, c. The larva. 



