OBSERVATIONS 



ON 



WARBLE FLY ok OX BOT FLY 



CEstrus hovis, Clark ; Hijpoderwa bovis, DeGeer. 



Fig. 1. — Hypoderma hovis. 1, egp;; 2, maggot; 3 and 4, chrysalis-ease; Sand 

 6, fly; 3 and 5, nat. size, after Bracy Clark; the other figures after Brauer, and all 

 magnified. 



Nearly two hundred years have elapsed since the first noticeably 

 recorded observations were made on what we now know as the Warble 

 Fly, scientifically the Ilijpoderma bovis of DeGeer. Those who wish to 

 work up the early notes on this infestation, which, though often 

 uncertain in identification, and dealing partially and incompletely with 

 the subject, still lead on towards what we now have advanced to, will 

 find a list of the chief writers, beginning with Vallisnieri in the year 

 1710, in Friedrich Brauer's invaluable book on the (EstridcB.*^ Passing 

 onwards down the list, — by the names of Reaumur, Linnfeus, Geoff'roy, 

 DeGeer, Fabricius, and other well-known writers, — we arrive (at the 

 date of 1797) at Bracy Clark, the eminent Veterinary Surgeon, of 

 whom Prof. Westwood, the late Life-President of our own Ento- 



* ' Monographie der (Estriden,' von Friedrich Brauer, pp. 124 — 126; Wien, 1863. 



