THE METALLIC WOOD-BORING BEETLES. 



803 



Geoup C. 



In this group the fourth joint is slender and very similar to the 

 third, the fifth broader (Fig. 307, Nos. 1 and 2). The species are, 

 for the most part, smaller and more slender, rarely over 6 mm. in 

 length. 



KEY TO INDIANA SPECIES OF GROUP C. 



a. Hind angles of thorax not at all carinate. 



1). Elytra with pubescent spots or spaces forming a distinct design ; 

 length 4-4.5 mm, 1524. subctnctus. 



h~b. Elytra without pubescent spaces, vaguely costate; thorax transverse- 

 ly strigose and punctate ; scutellum carinate ; length 3 mm. 



1525. PUTILLUS. 



a a. Hind angles of thorax distinctly carinate. 



c. Elytra with pubescent spots; lateral margin of thorax as seen from 

 the side, sinuous; length 4.5-6 mm. 

 a. Front convex, not impressed ; prosternal lobe deeply emarginate. 



1526. LECONTEI. 



dd. Front more or less concave and distinctly impressed; prosternal 

 lobe very feebly emarginate; last dorsal segment without a 

 carina ; head roughly strigose. 1527. addendus. 



cc. Elytra without pubescent spots ; lateral margin of thorax straight, 

 deflexed only in front. 

 e. Male with under surface distinctly pubescent, the first two ventral 

 segments deeply channeled; thorax without lateral impressions. 



LACUSTRIS. 



ee. Male with first two ventral segments flat or feebly channeled, not 

 pubescent ; length 3-5 mm. 

 /. Antennae slender, joints longer than wide. 152S. egenus. 



//. Antennae shorter, the serrate joints wider than long; prosternal 

 lobe emarginate. 1529. pusilltjs. 



1524 (4734). Agrilus subcinctus Gory, Mon. Buprest, IV, 1837, 252. 



Elongate-oblong, moderately robust. Piceous, with faint bronze lustre ; 

 elytra with two yellowish pubescent spaces, one extending from humeri to 

 middle, with two interruptions, then turning obliquely outwards; the sec- 

 ond oblique, one-fourth from apex. Occiput strigose and with a deep me- 

 dian impression. Thorax one-fourth wider than long, sides regularly curved ; 

 disk with a rather broad but shallow median groove extending the full 

 length and a well marked depression each side ; surface transversely stri- 

 gose at middle, obliquely so on sides. Elytra somewhat dilated behind the 

 middle, tips rounded and serrulate; disk slightly flattened with a vague 

 costa, surface with coarse scales. Prosternal lobe broadly emarginate. 

 Length 4-4.5 mm. 



Vermillion, Marion and Vigo counties; scarce. May 30-July 

 21. Taken by beating. 



