120 FAMILY II. - CA 



XXXI. ('ALATIH-S Boii. 1813. (NL.. "a circular basket" or 



"calyx-like."; 



Brownish or black beetles of medium or small size, possessing 

 the characters of the tribe Platyniui. From allied genera they are 

 separated by the smooth tarsi, the claws of which are serrate. Six 

 examples of our most common species (gregarius] were dissected 

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

 of caterpillars and other insect larva', and the remainder of the 

 pollen of grasses. Our species occur beneath logs, etc., usually in 

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

 papers treating of them are by 



LeConte.In Proc. Phil. Acad. Xai. Sci., VII, 1854. 36; 1860. 

 317. 



Ten species have been described frem the Tinted States, three 

 of which have been taken in Indiana. 



KEY TO INDIANA SPECIES OF CALATHl'S. 



n. Thorax nut narrowed behind, its base as wide as base of elytra; basal 



impressions feeble or wanting. 



//. Entire upper surface polished, shining; sides of thorax moderately 



reflexed. 104. GREGAKIUS. 



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



pressed. broader behind, not rellexed. 1!r>. or-Acri.t s. 



an. Thorax broadest rather before the middle, slightly narrowed toward 



the base, the latter narrower than base of elytra: basal impressions 



distinct. 196. IMPI'.XCTA'ITS. 



*1!4 (741M. CALATHTS <;KK<;AKII s Say. Trans. Amer. Phil. Soc., II. 182:',. 

 47; ibid. II. 472. 



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

 paler; antenna? and legs reddish-brown. Tin. rax slightly longer than br.iad. 

 bind, angles rounded. Elytral striae shallow, not punctured. Length 10 11 mm. 



Throughout the State; common. January 11-November 17. Gre- 





arious in cold weather. 



i:: 1!)5 (744). CALATHVS OPACULUS Lee., Proc. Phil. 

 Acad. Nat. Sci., VII, 1854. ."-7. 



Form of !/r('u<iriiix. Head and thorax reddish - 

 :.r chestnut-brown : anteiin:e and legs paler: elytra 

 dull pi< eons or very dark brown. Thorax not 

 linger than wide, slightly narrowed toward apex. 

 Elytra minutely alulaceniis. the stri;e very tine. 

 l.cii-th s.n-ld mm. I Fig. 71. 1 



Lake .Marion, Piilnam and Vigo counties; 

 frequent. .January 1 November 24. Prob- 

 g. 71. x'3. (Original.) ably occurs throughout the State. 



