3S FAMILY II. CAEABIDJ:. 



from almost \yhite to that of the perfect insect, and leaving the old 

 pupal skin behind the young beetle crawls forth to the shelter of 

 some object which will protect it by day. while at night it roams 

 freely in search of food or a mate with which to perpetuate its kind. 

 About 13.000 species of Carabida? are known, more than 1.200 

 of which have been described from the different parts of the United 

 States. Of these 366 representing 73 genera have, up to the pres- 

 ent, been taken in Indiana. The principal papers treating of each 

 genus will be mentioned under the tribal or generic heading. For a 

 general classification of the family the student is referred to the fol- 

 lowing papers: 



LiConie. — "Xotrs on the ('las.-sification of the rarabida of the 

 United States."' in Trans. Amer. Phil. Soc. X, 1>.33. 363-403. 

 Horn. — "On the Genera nf Carabidfe with special reference to 

 the fauna of Boreal America." in Trans. Amer. Ent. Sot-.. 

 IX. ISSl. pp. 91-196. pis. III-X. 

 By Dr. Horn the Carabida^ were divided into three subfamilies, 

 two of which are represented in Indiana. 

 '■^'*— - — ^' KEY TO i:^Di,\x.\. si'i;families of carabidj:. 



(7. Middle coxal cavities not entirely enclosed by the 

 sterna alone, the epimeron of the mesostemuni 

 reaching the coxa on the outer side. (Fiir. 20.) 



Subfamily I. Carabix^. p. SS. 



00. Middle coxal cavities entirely enclosed by the sterna, 

 Fjg, 26. the epimeron not reaching the coxa : head without 



(Aftei Leng.) antennal grooves beneath and with one or more 



1. Coxal cavities; 2. distinct bristlv hairs ab,>ve the eves. 



Epimeron; 3. Mesostema; . 



4. Melastema. Subfamily IT. Harpat.ix.e. p. 1,3. 



Subfamily I. CARABINAE. 



In this subfamily the epimera of the mesosternum nearly equal 

 the epistema in size and reach the coxal cavities, forming a part of 

 their enclosing walls. The head has one or two large punctures 

 above each eye. each bearing a bristly hair; sides of thorax usually 

 with two similar punctures. Front tibite either entire, obliquely 

 grooved or emarginate. The subfamily is divided into 15 tribes, of 

 which hut six are represented in Indian n. 



KKV TO INDIAN.^ TRlllKS (IK CARAI'l N .!■:. 



a. Fruut coxal cavities oprii lieliind. 



h, Iliud rox;e separated: labrum ilt't'ply forked. 



Tribe 11. Cychbini, p. 41, 



