120 FAMILY ir. CABABITU:. 



XXXI. (ALATHrs Bmi. ]>13.^ (Mi., "a circular basket" or 



'' calyx-like." i 



Brownish or black beetles of medium ni- small size, possessing 

 the charaiters of the tribe Platynini. From allied genera they are 

 •separated by the smooth tar^i. the claws of which are serrate. Sis 

 example.s of our most common species (arcgarius) were dis~;eeted 

 hy Dr. Forbes, who found that two-thirds of their food consisted 

 of oaterpillai-s and other insider lame, and the remainder of the 

 pollen of irrasses. Oui- species occur beneath logs. etc.. u-;ually in 

 dry upland woods. They are difficult to separate, and the only 

 papers treating of them are by 



L, Conic. --In Proc. Phil. Acad. Xat. Sci.. VII, l--.;^-t. 36; 1S60. 

 317. 



Ten species have been described from the I'^nited States, three 

 of which have been taken in Indiana. 



KEY TO INDIANA SPttlES OF CALATHUS. 



«. Tlioiax mit narrowed behind, its base as wide as base of elytra; basal 

 impressimis feeble or wanting. 

 h. Entire upnei' surface polisbed. shining; sides of thorax moderately 

 reflesed. 194. geegabits. 



hi). Head and thorax shining, elytra dull, opaque : sides of thorax de- 

 pressed, broader behind, not reUexed. 19.j, opaculvs. 

 (7(7. Thorax broadest rather before the middle, sliiihtlj" narrowed toward 

 the base, the latter narrower than base of elyti-a ; basal impressions 

 distinct. 196. lAiprNCXATis. 



'194 I 742 1 . Calathus greg.abits Say. Trans._ Amer. Phil. Soe.. II. 1S2?.. 



47 : ibid. II, 472. 



Elongate-oval. Dark chestnut or reddish-brown, the margins of thorax 



paler; antennse and leizs reddish-brown. Thorax slightly longer than hr.iail. 



bind angles rounded. Elytral •5tri;e shallow, not punctured. Length toll niuv. 



Throughout the State : common. .January 11-Xovember 17. Gre- 

 gariotis in cold weather. 



'T.1.5 (7441. CAi_\THrs OPACDLUS Lec., Proc. Phil. 

 Acad. Xat. Sci., VII, 1S54. S7. 

 I'orm of iircpaiiiis. Head and thorax reddish 

 or < hestuut-brown : anttMuiiP and legs paler: eb^tra 

 dull piienns or Aery (larl< brown. Thorax not 

 longer than wide, sliirlitly narrowed toward apex. 

 I'.l.vtra minutely alntace uis. the stri;e very fine. 

 Length s.."i-io mm. i ("i'r. 71,1 



Lake. Clarion, Ptitnam and Vigo counties; 

 freciuent. -lanuary l-November 2-1:. Prob- 

 Fig. 71. 3. (Original.) ablv occurs throughout the State. 



