38 



FAMILY ir. — CARABTD_^.. 



iTom almost white to that of the perfect insect, and Icaviiii-' the ohl 

 pui)al skill behiiul the young beetk^ crawls forth to the shelter of 

 some object which will protect it l)y day. while at night it roams 

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



A])out 13.000 species of Carabida' ai-e known, more than 1,200 

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

 States. Of these 3H6 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 tril)al or generic heading. For a 

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

 lowing papers: 



LcCoiiie. — "Notes on the (Uassification of the Carabida? of the 

 [■nited States,^' iu Trans. Amer. Phil. Soc.. X, 1853, 363-403. 



Jfnni. — "On the (Jcnci'a of Carabida' with special reference to 

 the fauna of Uoreal America." in Trans. Amci-. Ent. Soc, 

 TX. 1881. pp. 01-IOfi. pis. TTT-X. 



By Dr. Horn tlic Carabidie wei'c divided into Ihrce subfamilies, 

 two of \^■hi^•ll are repi'esented in Indiana. 



KKV TO INDIANA SI ISFAMII.IES OK CAKAHID.!':. 



(/. Middle cn.xnl cuvities im( enlirel.v enclosed liy llie 

 slern.-i nleiH'. Hie eiiiineren ef tlie niesnstermiui 

 reacliiiii;- the co.xa <>n Hie eiiter sid(>. ( Fi^- 2i;.) 



Subfamily I. Cakab[N.t.. p. oS. 



Fig. 26. 

 (Aftei Leng.) 

 1. C!oxal cavities; 2 

 Epimeron; 3. Mesostema 

 4. Metasterna. 



(/(/. .Middle eex;il c.-ivities entirely euelesed liy the sterna, 

 the eitiineroii not reaching the co.xa ; head without 

 autenual grooves lieneath and with one or mm-e 

 distinct In-istly hairs ab ive the eyes. 



Subfamily II. IIarpai.i.n.e. p. G8. 



Subfamily I. CARABINAE. 



In this sul)family the epimera of the mesosternum nearly ecpial 

 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 tibiip either entire, obliquely 

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

 which but six are represented in Indiana. 



KKY I'O I.NUIAXA I'HniK 



(/. Fronl coxal cavities (i|pen heiiiud. 



AKAHIIV.I^. 



h. Hind coxa' sei>arat(,'<l ; labruni deeiily lorl^ed. 



Tribe II. Cychrini, p. 4t, 



