12 THOS. L. CASEY. 



n. viridiacneus Beauv. — Head large. Prothorax one-half as wide 

 again as long, very slightly longer than the head, and very feebly narrowed 

 behind ; hind angles nearly acute, anterior angles rather broadly rounded ; 

 punctures at base very coarse and closely crowded, coalescent ; surface highly 

 polished, not granulate. Elytra equal in width to prothorax ; sides parallel 

 and very feebly arcuate ; surface strongly and very minutely granulated. 

 Length of head and prothorax together 4.5 mm., of elytra 6.3 mm. ; width 

 of elytra 4.0 mm. Female. 



This is a common form, and is widely distributed in the United 

 States, it is mentioned liere simply for comparison. 



The European ceneus seems to be distinct from all our allied species. 



H. COiivictor n. sp. — Head small, much broader than long. Prothorax 

 much longer than the head, one-third as wide again as long ; sides much 

 more arcuate anteriorly than posteriorly ; punctuation at the base deeper, 

 more widely diflused and less coalescent than in any of the other species. 

 Elytra as wide as prothorax ; sides parallel and nearly straight ; granulation 

 nearly obsolete ; striae deep, interspaces Hat. Length of head and prothorax 

 together 4.6 mm., of elytra 5.S mm. ; width of elytra 3.9 mm. ; male. 



Willets Point, Long Island. 



H. canon icus n. sp. — Form as in viricUieneux. Head small. Prothorax 

 just percei)tibly narrowed behind, not one-half as wide again as long; sides 

 strongly and nearly evenly arcuate ; punctures as in virHliceneus ; hind angles 

 less strongly, anterior angles more strongly arcuate than in that species. 

 Elytra very slightly wider than the prothorax ; sides parallel and rather 

 feebly arcuate ; granulation very feeble. Length of head and prothorax 

 together 4.2 mm., of elytra 5.0 mm., width of elytra 3.8 mm, Male. 



Rhode Island. 



II. llistralis n. sp. — Head large. Prothorax nearly as in viridiij;neus. 

 Elytra distinctly wider than the prothorax ; sides parallel and strongly 

 arcuate ; disk strongly and minutely granulated ; striae more feeble, inter- 

 spaces much flatter than in either viridi(enens or canonicus. Length of head 

 and prothorax 4.5 mm., of elytra 6.2 mm. ; width of elytra 4.3 mm. Female. 



New York State. 



The elytra have in the type specimen a strong reddish reflection, 



II. aenescens n. sp. — Form j-iroportionally much narrower and more 

 slendiT than in any of the four species which precede. Head rather large, 

 as wide across the eyes as long. Prothorax but slightly wider than the head, 

 feebly narrowed behind ; sides much more arcuate anteriorly than poste- 

 riorly ; more finely and sparsely punctured at base than in the other species 

 of this group, and also covering a more limited area ; much longer than the 

 head, and one-third as wide again as long. Elytra as wide as the prothorax ; 

 sides parallel and nearly straight ; striae moderate, interspaces feebly con- 

 vex ; granulation excessively minute and regular. Length of head and pro- 

 thorax together 4.0 mm., of elvtra 6,0 mm, ; wiilth of elvtra 3.4 mm, Male. 



