508 



FAMILY XVI. — COCCINELLID J: . 



what a resemblance to a minute alligator in shape, and are known 

 under that name by children in some parts of the country. As 

 is the case with other grubs, they are much more voracious than 

 the perfect beetles. When full grown the larva suspends itself 

 by the hinder end to some convenient leaf or branch and either 

 pushes the larval skin upwards, where it remains in a little wad 

 about the tail, or remains within it until ready to emerge, when it 

 bursts the skin open along the back and emerges a perfect beetle. 



The principal literature treating of the North American mem- 

 bers of the family is as follows : 



LeC onte. — ' ' Remarks upon the Coccinellida? of the United 

 States,," in Proc. Phil. Acad. Xat. Sci.. YI. 1852. 129-141. 



Crotch. — ' ' Revision of the Coccinellida? of the United States.'' 



in Trans. Amer. Ent, Soc. IY, 1873. 363-382. 

 Le Co nte.~ 'Short Studies of North American Coleoptera (Ey- 



peraspis)," in Trans. Amer. Ent. Soc, VIII, 1880. 186-188. 

 Horn. — "Studies in CoccinellidaB. " in Trans. Amer. Ent Soc. 



XXII, 1895, 81-114. 



Casey. — "A Revision of the American Coccinellidae. ' ' in Journ. 

 N. Y. Entom. Soc. VII, 1899, 71-163. 



Leng. — "Notes on Coccinellidae." in Journ. N. Y. Ent. Soc. XI. 

 1903. 35-15, 193-213 ; XVI, 1908, 33-44. 



About 150 members of the family are listed by Henshaw as be- 

 longing to the North American fauna. To these Casey added in 

 his Synopsis 179 new names, a number of which are evidently based 

 on geographic races or varieties, while many of them will doubtless 

 prove good species. Altogether it is probable that about 250 known 

 species occur in this country. 



For convenience the family, as represented in the State, is first 

 divided into eight tribes by the following table, modified from that 

 used by Maj. Casey: 



KEY TO INDIANA TEIBKS OF COCCINELL1D.E. 



a. Middle coxrc narrowly separated; body elongate-oval, glabrous: legs 

 long. free, the femora extending beyond the sides of the body : abdo- 

 men with sixth segment visible in both sexes; head not deeply in- 

 serted, the thorax strongly sinuate but not covering the eyes. 



Tribe I. Hippodamiixi. p. 509. 

 aa. Middle coxrc widely separated: legs shorter, the femora generally not 

 extending beyond the sides of the body: head deeply inserted, the 

 thorax covering a large portion of the eyes. 

 &. Front coxal cavities closed behind ; eyes finely faceted. 



