44 FAMILY IT. CAE ABIDES. 



andrewsii Harr., but, according to Leng, typical anclrewsii occurs 

 only in the mountain region of North Carolina, is .smaller, more 

 slender and lacks the interruption of some of the striae usually 

 noted on the apical third of the Indiana specimens. 



Tribe III. CARABIN1. 

 Species of medium or large size, for the most part noted for 

 their beauty of form, color or sculpture. Head not constricted be- 

 hind the eyes; labrum broad and emarginate : mandibles stout, 

 curved and without bristle-bearing puncture on outer side. Body 

 not pedunculate; scutellum small. Presternum prolonged, the 

 front coxa! cavities open behind, the hind coxae not separated. 

 Males with the front tarsi dilated and densely pubescent beneath. 

 The tribe is represented in the United States and Indiana by two 

 genera, separated as follows : 



KEY TO GENERA OF CARABINE 



a. Third joint of antennas cylindrical. HI. Carabus. 



aa. Third joint of antennas compressed. IV - Calosoma. 



III. Carabus Linn. 1765. (Get., "a horned beetle.") 



Black or brownish-black species above the average in size and 

 with the surface of the elytra more or less sculptured. They occur 

 beneath stones and logs and are nowhere common, not more than 40 

 specimens having been taken in the State during 25 years' collect- 

 ing. Nine or ten species are known from the United States. Of 

 these four have been taken in Indiana while another probably oc- 

 curs. For synoptic tables separating the United States species see : 



Crotch.—. Trans. Amer. Ent. Soc, V, 1876, 247. 



C ro tch.— Bull. Brook. Ent. Soc, I, 1878, 66. 



KEY TO INDIANA SPECIES OF CARABUS. 



a. Thorax punctate beneath; color brassy-bronze; elytra finely granu- 

 late with broken and continuous elevations. meander, 

 aa Thorax not punctured beneath. 



b Elytra each with three rows of foveas or little pits. 26. sylvosus, 

 V D, Elytra without fovese but with the fourth, eighth and twelfth inter- 

 vals broken so as to resemble a series of links, 

 c. Margin of elytra serrate near the base. 27. serratus. 



cc. Margin of elytra not serrate. 



d Elytra black, the margins bluish; intervals equal. 



28. LIMBATUS. 



dd Elvira bronzed ; four of the intervals elevated so as to form 

 slender ridges. 29 ' VINCTUS ' 



