THE METALLIC WOOD-BORING BEETLES. 805 



Occiput strigose and with a feeble median impression. Thorax one-fourth 

 wider than long, hind angles with a distinct, slightly oblique carina ; disk 

 without a median depression, those on sides well marked, transversely stri- 

 gose with small punctures between the wrinkles. Elytra slightly broader 

 behind the middle ; tips rounded, serrulate ; disk slightly depressed ; sur- 

 face with imbricate scales. Prosternal lobe truncate, more or less eraargi- 

 nate; tarsal claws broadly toothed. Length 3.5-5 mm. 



Throughout the State; common. May 24-July 25. Occurs on 

 foliage of various trees, especially the black locust, in which the 

 larva^ dwell. 



1529 (4724a). AGBILUS PUSILIAIS Say, Ann. Lye. Nat. Hist., I, 1825, 252; 



ibid. I, 388. 



Elougate-oblong, rather robust. TTead and thorax brassy or bronzed: 

 elytra purplish-black. Antemisi? reaching middle of thorax. Occiput with 

 a feeble median impression. Thorax one-fourth wider than long, slightly 

 narrowed at base; sides curved in front, slightly sinuate near hind angles, 

 which are distinctly carinaie; disk with a broad transverse depression in 

 front of base, so that when viewed from the side the front half is more 

 convex ; lateral depressions moderate ; surface coarsely transversely strigose 

 with coarse punctures between the wrinkles. Elytra distinctly dilated be- 

 hind the middle ; disk with a vague costa on each side and concave each 

 side of suture ; surface with sparse, smooth scales. Length 3.5-4.5 mm. 



Vermillion, Knox and Poser counties; frequent. June 8-July 7. 



XIV. TAPiiROOERrs Sol. 1883. (Or.. " pit i horn.") 



In tins and the remaining genera of the family the under side of 

 the thorax is deeply grooved near the margin for the reception of 

 fhe antenna? in repose; the legs very retractile, the tibiae being usu- 

 ally silicate for the reception of the tarsi, which are short. In 

 Taphrocerus the body is elongate and the prosternum narrow and 

 pointed behind. 



1530 (4755). TAPHROCERUS GRACIIJS Say, Ann. Lye. Nat. Hist., I, 1825, 



253 ; ibid. I, 389 ; II, 599. 



Elongate-oblong, strongly tapering on apical third. Blackish-bronzed, 

 shining. Occiput with a broad but shallow median depression. Thorax 

 one-half wider than long, very uneven, a transverse, slightly impressed line 

 near apex and a triangular indented space on each side of basal half; sur- 

 face very finely and densely punctate and with scattered shallow punctures 

 of much larger size. Elytra with sides strongly sinuate ; disk with rows 

 of rather large deeply impressed punctures which become obsolete on apical 

 third; usually witb vague patches of whitish pubescence arranged in 1 \vu 

 crossbars on apical ball'. Length 3.5-5 mm. 



Throughout the State; frequent. May t>- August 21; mating on 

 May 21. Occurs on the flowers and leaves of the button bush, 

 Cephalanthus occidentalis L., and on herbs in low, wet places. 



