THE METALLIC ^V(lOD-BORI^'(i BEETLES. 805 



Occiput strigose and witb a feeble median impression. Thorax one-fourtli 

 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; siu-- 

 (ace with imbricate scales. Prosternal lobe truncate, more or less emargi- 

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



Throughout the State ; common. jMmv 24--July 2.5. Occurs on 

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

 larvffi dwell. 



1529 (4724a). Agrilus pvsillus Say, Ann. Lye. Nat. Hist., I, 1825, 2.52; 



ibid. I, 388. 

 Elongate-oblong, rather rolmst. Head and thorax brassy or lironzed; 

 elytra purplish-black. Aiiteunoe 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 carinate; 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 

 Vith 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 Posey counties; frequent. June 8-July 7. 



XIV. Tapheoceeus Sol. 1833. (Gv., "pit -H horn.") 



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

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

 the antenna" in rcpo.'-e; the legs very retractile, the tibiae being usu- 

 ally suleate for the reception of the tar^i, which are short. In 

 Taphrocerus the body is eloiio;ite and the |)i-nsternura narrow and 

 pointed behind. 



1530 (4755). Taphrocerus gracilis Say, Ann. Lye. Nat. Hist., I, 1825, 



253 ; ibid. I, 380 ; 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 impressci! ]iunc-tures which become obsolete on apical 

 thii-d; usually witli vague j)atch('S of whitish pubescence ai-rniigori in two 

 i-r()ssba}'S on apical half. I,eugth :'..5-5 mm. 



Tliroiigliuut tlic .State; fre(|uent. iiay (i-August 21; mating on 

 May 21. Occurs on the flowers and lea^•es of the button bush, 

 CephdlaiiULUS occidenialis L., and on herljs in low, wet places. 



