84 



FAMILY II. CABABID£E. 



110 (459). Tachys fekkuginbus Dej., Spec. V, 1831, 50. 



IJobust, strongly convex. Uniform redflisli-brown, shining, often trans- 

 lucent ; antenn;G dusky, paler at base. Thorax one-half wider than long, 

 sides slightly curved In front, feebly sinuate behind ; bind angles rectangu- 

 lar, not carinate. Elytra more than one-half wider than thorax, with a 

 deep sutural and a finer abbreviated second stria, rarely with traces of a 

 third. Length 2.ri-:-;.2 mm.' 



Southern half of State; frequent; much less so northward. 

 April 17-]\Iay 28. Occurs usually in the nests of ants, though some- 

 times beneath chunks in damp localities. 



Gkoup B. 



In this group the mentum is marked behind the median tooth 

 with two large xleep punctures. Five species are known from the 

 State. They comprise the Indiana species of Groups V-IX of 

 Havward. 



Fig. 54. a, Front tarsus of T. proximus (male); h, 

 antenna of T. la-vus; c, front tarsus of T. comt^cus 

 (male.) (After Hayward.) 



KEY TO INDIANA SPECIES OF GROUP B. 



a. Elytra with the marginal stria broadly Interrupted at middle (obsolete 

 in Iwvu.s). 

 h. Recurved portion of the sutural stria very short, parallel with the 

 suture, not hooked at tip ; two dorsal punctures on the third in- 

 terval near the third stria; form depressed; length 1.2-1.5 mm. 



111. L.Evns. 



l)h. Recurved portion of the sutural stria long, nearly parallel to the 



suture, distinctly hooked at tip ; the first dorsal puncture on fourth 



interval, the second enclosed within the recurved portion of the 



sutural stria ; length 2.3-:!.2 mm. 



c. Male with the first two joints of the front tarsi dilated (Fig. 



54, (0; elytra oblong-oval, pale with an ill-defined dark blotch 



behind the middle. 112. pRoxiirus. 



fc. Male with only the basal joint of the fi-ont tarsi dilated (Fig. 



54, c). 



(1. Males with tlie inner angle of the dilated joint of front tarsi 



without a\spine ; color more reddish than in pro.rimiix. with 



tlie dark blotch of elytra bettor defined, fretineutly extending 



to the margin. 113. scitulus. 



