120 



FAMTTA' Tl. — f'AT{ A nU)M 



XXXI. Cai.atiiis 1>())i. ISl:!. (XL.. ";i cii-ciilnr Ijaskd " oi- 



"cjilyx-likc." 1 



l)i-<)\\iiisli or black lu'cllcs oT iiuniiiiiii ov sniail size, |)()ssessiii<i- 

 I he charaeters of the tribe Plntyniiii. From allied genera they are 

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

 examples of our most comimm species (ftr((farli(s) were dissected 

 by Dr. Forbes, who t'ouiul that t\vo-thii-ds of their food consisted 

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

 ])()llen of grasses. Onr species occui- bencatli logs, etc.. usually in 

 dry upland woods. They are difficult to sei)arate, and the only 

 papers treating of them are hy 



LeConic.--In Proc. Phil. Acad. Nat. 8ci.. VII, 1854, 36; 1860. 

 317. 



Ten species have been desci-ibed from I he United States, three 

 of which hav(^ been taken in Indiana. 



\ 



KEY TO INDIANA SI'IX'IES OF CALATHUS. 



(/. Thorax not narrowed behind, its base as wide as liase of elytra; basal 

 impressions feelilc or wanting. 

 h. Entire uiiper snrCace ]>o]ished, shinini,'; sides of fhorax nioderatel.v 

 reflexed. 104. gregariiis. 



/*/*. Head and thorax sIuniiiLC. el.vtra dull, opuiine; sides of thorax de- 

 pressed, broader behind, not reliexed. V.)7). oi-Acrns. 

 '/(/. 'i'horax broadest rather I)efore the middle, slightl.v narrowed toward 

 the base, the latter nari-ower than base of elytra; basal impi-essicais 

 distinct. 196. imptinctatis. 



^^1!)4 (742). Calathus gregarius Say, Trans. Amer. Phil. Soe., II, 181!.'!. 



47; ibid. II, 472. 



Elongate-oval. Dark cliestnut or reddish-brown, the margins of thor.-ix 



lialer; antennje .and legs reddish-brown. TlKirax slightly longer than br.iad. 



hind angles rounded. Elytral striiP shallow, not punctured. Length lo II nun. 



Throughout the Stale ; c(nnmon. Jainiary ll-November 17. Gre- 

 garious in cold weather. 



■I'.t.j (744). Calathi's opaculus Lee, Proc. Phil. 



Acad. Nat. Sci., VII, 1854, .•t7. 



i'orni of !/n'!>(iiiiis. Head and thorax reddish 



■ •r chestiiul-lirown : aiitciiii;!' ,iiid legs palei'; elytr.-i 



dull iii(('ons oi' \ciy dai'i< brown. T'horax not 



IniiLTer than wide. sllLditl.\ uan'ovved toward apex. 



i:iytra niiimtely a inlaccius. tli<> stri;p ver.v tine. 



■\^ l.ouL,'(ii s..-, 10 mm. { Fig. 71. ) 



Lake .Marion. I'm) nam and Vigo counties; 

 rre(|uenl. .lanuacy 1-November 24. Prob- 

 Fig. 71. X 3. (Original.) ably occitfs thrcmg'hout the State, 



