DIPTEEA OE TEUE FLIES. 



215 



suifer from this pest, because the eggs are detached by the 



"curry-comb." Farm-horses in districts where G. equi is 



abundant should have shelter from the 



sun during the hot part of the day ; and 



those in use should have their knees and 



shoulders dressed with salt-and-wat'er and 



some deodorant, to deter the fly from 



ovipositing. Salt is said to be good, but 



how it works is unaccountable. Tartar 



emetic in two-drachm doses every day for 



ten days is said to clear the " bots " out 



of the stomach. 



Fig. 107 — Larva of 

 HoRSE-BOT Fly. 



occur in 



Horae-bot ; b, end of 



Several other " hot - flies " 

 -Bvii^in—Hypoderma diana and Geph^ SnToV &otf of hooked 

 noniyia rufibarbis, both on deer, and ™'°'Ji*'i«s- 

 Hypoderina (equi ?), producing warbles on the back and loins 

 of horses. This last I have never been able to rear, but have 

 seen it on several occasions in the bot-stage. 



Boot -eating Flies (Anthomyidse). 



The Anthomyidse include a great number of flies which are 

 all more or less dull in colour, and covered with many bristles 

 and hairs. Their larvae are white footless grubs, which taper to 

 a point towards the head end, and are blunt at the posterior 

 end. Several are very injurious to crops. No full description 

 of the adults will be given here, as they are all much alike : 

 only specialists are able to identify them with any certainty. 

 The larvse live in the roots of plants and set up decay. The 

 most important are the following : the Onion Fly {Phorhia 

 eepetoi-um) ; the Cabbage-root Flies {Anfhomyia radioMi, A. 

 brassicce, and A. floralis) ; and the Wheat-bulb Fly [Hylemyia 

 coardata). 



