pupa state is assumed, but not by shedding any skin, as do true 

 insects in going througli their transformations. New legs, feel- 

 ers, and mouth-parts form under the old skin, which, with its 

 now useless legs, distends so as barely to cover the new parts, 

 which are all appressed to the body very much as in the pupa 

 of a beetle. Finally both the distended larval skin and the 

 new one that incases the pupa burst, and rele.ase a creature 

 quite different ■' ■ . The mature form passes the winter in the 

 ground, and is active whenever the temperature is a few de- 

 grees above freezing point '". 



In the United States it has not infrequently happened that 

 these mites alone have almost exterminated the destructive 

 locusts over considerable tracts of territory. 



Their habits of clinging to the legs and wings of the volado- 

 ras insures their being carried from one part of the country- to 

 another so as to be on hand where eggs are deposited. 



Anthomyia — Sp. 



In a chapter devoted to a description of insect and other 

 enemies of the Rocky Mountain Locust, Professor C. V. Riley 



Fiff. II. — .\ntlnMii\ i:i l-^i;;; -para^iu 

 ¿J, puparia; r, ll\ — all iiilai'g'ed. 



II. larva; 



writes " This (Antlioniyia diiiiitstifroiis Meig.) is, perhaps, 

 the most common and \vidc-spread of all the different egg- 



