666 STATE BO\RD OF AGRICULTURE. 



CHALARUS Wlk. 

 C. spurius Fall. Delaware Water Gap, VII, 12. 



Family PLATYPEZIDiE. 



Termed " flat-footed " flies because in the males the posterior tarsi are broad 

 and much flattened. They are smaller than but resemble a house-fly, and 

 occur in swarms near water courses, though locally. The larvre live in mush- 

 rooms, and are not of economic importance. 



PLATYPBZA Meigen. 

 P. velutina Loew. Dunnfield, Del. Water Gap, VII, 11, Riverton, VII, 30. 



CALLOMYIA Meigen. 



C. tenera Doew. Westville, VII, 2, 21, Riverton, VII, 23 (Jn), "New Jer- 

 sey," IV (Am Ent Soc). 



Family (ESTRID-ffi. 



These are the "bot-flies," usually of good size, sometimes very large, and 

 peculiar by having the mouth parts almost entirely aborted. Some are hairy, 

 yellow, with rather a pointed abdomen — others are very plump, blue black, 

 with a white bloom and very formidable in appearance. The larvae live in the 

 nasal passages, in the stomach or beneath the skin of the animals infested by 

 them and often cause serious functional disturbance in the animals affected. 

 They also lessen the value of the skins. The ordinary bots attacking horses 

 and cattle lay their eggs on the hair of the animals, where they are likely to 

 be licked off and so brought into the mucus-lined passages : hence it is a good 

 plan, where bots are numerous, to keep horses cleaned and brushed and to 

 prevent their licking themselves Bots beneath the skin should be treated with 

 mercurial ointment, and after a day or two squeezed out through a sufficient 

 incision. Where they infest the stomach, or get into the nasal passages, a 

 veterinarian must be consulted. 



GASTROPHILTJS Leach. 



G. equi Fabr. Caldwell (Cr) : the horse bot-fly, which spends the larval stage 

 in the intestines, and is passed naturally when full grown : it pupates 

 under ground and the eggs are laid on the hair. 



G. nasalis L,inn. Caldwell (Cr). 



