Ii8 LETTERS TO MR. BAILEY [CHAP. xiv. 



of S. Australia ; (this time from our friend Mr. Molineux) 

 relative to Horse botfly and very especially to make 

 them sure regarding the precise differences between Bot, 

 Warble, and Gad flies. I have explained that Gad flies, 

 Tabanidce, may be distinguished by being blood suckers, 

 and by their maggots feeding in the ground, and that ' Bot ' 

 or ' Warble ' are only two convertible names for QLstridce, 

 but that ' Bot ' is usually most specially applied to internal 

 feeding maggots, and Warble to those that live in the hide, 

 notably in Warbles. But such difficulty continues to arise 

 from haphazard use of the words, I have suggested that if 

 possible the scientific name (Gastrophilus equi) should be 

 insisted on. An entomologist (?) had absolutely called this 

 attack or kind of attack inside a horse that of ' Gad fly ' ! 

 But as the attack has been well studied in the Department of 

 Agriculture, Cape Town, I have suggested they should 

 communicate with the Government entomologist, Mr. C. 

 Lownsbury. For their practical needs, I have suggested 

 clearing the Horse botfly, G. equi, eggs from the hair by 

 dressing, and very especially that they should take care all 

 droppings (in which the maggots pass from the horse, and 

 where, or in the ground beneath, they go through their 

 changes to the perfect state) should be so treated as to kill 

 the maggots. It may possibly turn out that the Gastrophilus 

 may be some other species than equi I have not had 

 specimens. When you are about to devote so much 

 attention to Colonial Agriculture [in the " Garton " course 

 of Colonial and Indian Lectures], I wished very much to 

 tell you what I am about, lest I should, as this is sent me 

 officially, go on other lines than you approve."] 



June g, 1 89 1. 1 



DEAR MR. BAILEY, I have now much pleasure in asking 

 permission once again to place in your hands a cheque for 

 S 5 s v to be used exactly as you may judge fit, in purchase 

 of prizes for the encouragement of serviceable study of 

 habits and means of prevention of ravages of injurious 

 insects by your scholars. I have real pleasure in doing this 

 because I believe the importance of those who are in any 

 way connected with agriculture being serviceably acquainted 

 with the causes of loss to crop or stock, and means whereby 

 this may be lessened, cannot be over-estimated. I offer 

 my hearty congratulations to yourself and your pupils on 

 the satisfactory work achieved in my own department of 

 agricultural entomology in one more year. 



1 Letters to Mr. Bailey continued. 



