471 



FAMILY XT. STAPH YLIN IBiE . 



more closely punctured, the median smooth space more narrow. Elvira and 

 abdomen rather closely and coarsely punctate. Length 4-5.5 mm. 



Throughout the State; frequent in the southern counties, much 

 less so northward. March 23-July 14. Usually found burrowing 

 in the ground beneath stones. The smaller size, paler antennae and 

 legs and more closely punctate upper surface readily distinguish 

 it from planifrons. 



LXXVII. Holotrochus Erichs. 1840. ((jr., " whole + ring or 



circle. ") 



Small subeylindrical glabrous species having the 

 head narrower than thorax, antennas slender with 

 short basal joint; front tibia? not spined. (Fig. 169.) 



916 (2704). Holotrochus t,2evicauda Lee. Proc. Phil. Acad. 

 Nat. Sei., 1866, 376. 

 Elongate, slightly depressed. Dark reddish-brown to 

 piceous; antenna? and legs paler. Head and thorax very 

 Fig. 169. Hoktro- finely and sparsely punctate, the latter subquadrate ; slightly 



APoSiffiS Wklei ' than l0Ug; SideS almost slight; ^ind angles rect- 

 cies x 6. (After angular. Elytra slightly wider and almost one-half longer 



Ericnson.) +i„ ^ 'i 



than thorax, hnely and sparsely punctate, the sutural stria? 

 distinct. Abdomen very minutely punctate above, more distinctly so be- 

 neath. Length 3.5-4 mm. 



Putnam and Marion counties; rare. March 20-November 22. 

 Taken by sifting. 



Tribe III. OMALIINI. 

 Small depressed brown or piceous forms having the presternum 

 membranous behind the coxa-; tarsi 5- jointed; second ventral seg- 

 ment carinate at base and the head with two simple eyes (ocelli). 

 Our species are in part treated in the following papers : 



Fauvel, Albert.— "Lies Staphylinides de l'Amerique du Nord— 

 Homalini." in Bull, de la See. Linn.. 3rd ser vol II 1878 

 196-255. 



Casey.— Coleopterological Notes, V," in Ann. N. Y Acad Sei 

 VII, 1893, 398-433. 



The following genera are probably represented in the State: 



KEY TO INDIANA GENERA OF OMALIINI. 



a. Last joint of maxillary palpi not awl-shaped. 

 b. Hind tarsi with joints 1-4 unequal. 



c. First joint of hind tarsi much longer than second. , 

 d. Fourth joint of maxillary palpi not longer than third, pear- 

 sha Pe<l LXXVIII. Geodbomicus 



