THE ANT-LIKE STONE BEETLES. 



291 



Putnam, Monroe and Posey counties; rare. March 6-July 10. 

 Taken by sifting. 



Tribe V. CLAMBINI. 



Very small oblong or globose-oval species having the hind coxaa 

 contiguous with plates covering the thighs ; tarsi four-jointed, tibiae 

 without spurs. Our only species of the tribe belongs to the genus : 



XV. Clambus Fischer. 1820. (Gr., ''mutilated.'') 



The members of this genus have the elytra not margined at the 

 sides and without epi pleura; hind coxal plates wide; antennae 9- 

 jointed, arising close to the eyes, the club 2-jointed; abdomen with 

 five segments visible. Two species probably occur in the State, 

 though but one has been taken. 



KEY TO INDIANA SPECIES OF CLAMBUS. 



a. Surface smooth, shining, without punctuation or pubescence. 



GIBBULUS. 



aa. Surface sparsely pubescent : elytra rather densely and finely punctulate 

 behind the middle. 567. puberulus. 



C. gibbulus Lee, globose-oval, piceous-black, length 1 mm., is 

 said to occur from Canada to Texas, but has not yet been recog- 

 nized from Indiana. (Fig. 112. c.) 



567 (1813). Clambus puberulus Lee, N. Sp. N. Amer. Col., I. 1866, 26. 



Globose-oval. Piceous or dull sooty brown, finely and sparsely pubes- 

 cent; elytra paler toward the tips; legs and antennae dull brownish-yellow. 

 Head and thorax very finely and sparsely punctulate. Elytra more dis : 

 tinctly punctulate, very sparsely on the disk, gradually more dense to the 

 tips. Length 1 mm. 



Marion and Monroe counties ; scarce. April 23-October 15. 

 Taken from window of cellar in which wood had been stored and 

 from debris in beech stump. 



Family IX. S C YDMiEN IDiE . 



The Ant-like Stone Beetles. 



Very small, shining, oval, convex species, brownish or piceous in 

 hue and usually having the upper surface rather thickly clothed 

 with erect hairs. They occur beneath bark or stones in moist locali- 

 ties; also often in ants' nests, and are frequently on the wing at 

 twilight. From the smaller Silphida?. to which they are closely re- 

 lated, they differ by having the hind cbxaa separated and the facets 



