ORDER LEPIDOPTERA. 137 



feet long. MycetoUa sordidn Pack, lives in sour sap in cracks of the 

 bark of elm-trees. 



Family Cecidomyidae. This great family of gall-gnats comprises 

 mostly minute flies, which have but few veins in the wings, short 

 coxae, the femora slender, and the tibiaa without spurs. They insert 

 their eggs in the leaves of trees and stems of plants, raising a gall or 

 tumor "within which the maggots, often pink in color, live. The 

 larva of Miastor produces young, living larvse. Examples of the 

 family are the wheat midge, DipLom tritici (Kirby, Fig. 238), and 

 Hessian fly (Fig. 237). Cecidomyia, grossularice Fitch causes the goose- 

 berry to turn prematurely red. 



OKDER XV. LEPIDOPTERA* (Moths and Butterflies). 

 The beginner in the- study of insects, after dissecting a 



* SELECTED WORKS. 



Abbot, J., and J. E. Smith. The natural history of the rarer lepidop- 

 terous insects of Georgia (i, ij. London, 1797. Fol. Mauyplates). 



Boisduval, J. A., et Guenee.f Species generates des Lepidopteres (8 

 vols., 8vo. Suites a Button. Paris, 1863-74). 



Breitenbacb, W. Ber-Schrnetterliugsrussel (The butterfly's tongue). 

 (Jena. Zeits. f. Naturw., 1881.) 



Burgess, E. Contributions to the anatomy of the milk-weed butter- 

 fly, Danais archippus (Mem. Bost. Soc. Nat. Hist., 1880). 



Chambers, V. T. Index of described Tineina of North America (Bulletin 

 Hayden's Survey, 1877). Also other papers in same Bulletin; Can. 

 Eut., etc. 



Clemens, B. Synopsis of North American Sphiugidae (Journ. Acad. 

 Nat, Sc., Phil., iv., 1859). 



Tineina of North America. Edited by Stainton. (8vo, London, 



1872. A collection of all his papers on the subject.) Also papers 

 in Proc. and Journ. Acad. Nat. Sc., Phil., 1859-62. 



Cramer, P. Papillons exotiques (4 vols., 4to, 442 plates. Amsterdam, 

 1789-91). 



Edwards, H. Pacific coast Lepidoptera (i.-xxx. Proc. Cal. Acad. 

 Sc., 1873-78). 



Catalogue of U. S. described lepidopterous larvae of North 



America (Bull. Ent. Div. Dept. Ag., Washington, 1888). Also 

 numerous papers in Papilio, i.-iii.; Eut. Amer., etc. 



Edwards, W. H. Butterflies of North America (i.-iii., many pis. 

 Phila., 1868-1888). 



Fernald, C. H. A synonymical catalogue of the described Tortricidae of 

 North America (Trans. Amer. Eut. Soc., x., Phila., 1882). Also 

 papers in Can. Ent., Amer. Nat. 



French, G. H. The Butterflies of the Eastern United States (Philadel- 

 phia, 1886). 



Grote,<A. E. An illustrated essay on the Noctuidae of North America 

 (London, 1882). See also numerous short papers in Trans. Amer. 

 Ent. Soc., Bulletin Buff, Soc., Bulletin Hayden's Survey, Ca- 

 nadian Entomologist, etc., 1863-1887 (containing descriptions of 

 about 1000 species). 



(Continued on next page.) 



