84 



FAMILY II. OAKAIUL^K. 



110 (4."il>). TACHYS FEKKI UINEIS Dej., Spec. V, is:;i, G'.t. 



Robust, strongly convex. Filiform reddish-brown, shining, often trans- 

 lucent ; antenna 1 dusky, paler at base. Thorax one-halt' wider than long, 

 sides slightly curved in front, feebly sinuate behind; hind 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. ~> -'.'>. '2 mm. 



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

 April 17-May 28. Occurs usually in the nests of ants, though some- 

 times beneath chunks in damp localities. 



GKOUP B. 



In this ^roup the men turn is marked behind the median tooth 

 with two laru'e deep punctures. Five species are known from the 

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

 Hayward. 



Fig. 54. a, Front tarsus of T. proiimu* (male); 6, 

 antenna of T. torus: c, front tarsus of T. corruscus 

 (male.) (After Hayward.) 



KEY TO INDIANA SPECIES OF GROUP B. 



<;. Elytra with the marginal stria broadly interrupted at middle (obsolete 



in 7TH* ). 



1>. 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.EVUS. 



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

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

 interval, the second enclosed within the recurved portion of the 

 sutural stria ; length 1'.3 :!.2 mm. 



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



54, a); elytra oblong-oval, pale with an ill-defined dark blotch 



behind the middle. 112. PROXIMIS, 



CO. Male with only the basal joint of the front tarsi dilated (Fig. 



r,4. C). 



r/. Males with the inner angle of the dilated joint of front tarsi 

 without a spine: color more reddish than in in-oj-im-iix. with 

 the dark blotch of elytra better defined, frequently extending 

 to the margin. 113. SCITULUS. 



