INSECTS AND THEIR ALLIES 



Ent. Soc. Phil., Proc. Ac. Nat. Sc. Phil., Bull. 

 U.S.N.M., Bull. Div. Ent., U.S. Dep. Agric., etc. 



DlPTEEA. 



Loew, H., >and Osten Sacken, C.R. Monographs of 

 the Diptera of North Africa, 4 parts (Smith. 

 Miss. Coll., 1862-72 (Tijmlidae, Cecidomyi- 

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Townsend, C. H. T. The North American Genera 

 of Nemocerous Diptera. (Trans. Am. Ent. 

 Soc., pp. 144-160. 1892). 



Williston, S. W. Manual of the Families and Gen- 

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Also monographs and synopses of families, gen- 

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