294 Journal New York Entomological Society. t VoL xxyii. 



at various localities in New York State. Dentellum is distinguished 

 by its broader, more parallel form, rufous legs — femora frequently 

 piceous medially — and thorax with sides less strongly curved and base 

 as wide as or slightly wider than the apex ; graciliforme by its elon- 

 gate-oval form, testaceous legs, thorax broader and larger, with sides 

 more strongly curved and margins wider, base slightly narrower than 

 the apex. 



A study of Leconte's descriptions and the two European speci- 

 mens of dentellum now at hand makes it seem probable that Hayward 

 was wrong in the naming of both of these species. The thorax in 

 the European specimens is broader and flatter with the sides more 

 strongly rounded; they seem very distinct. Also Leconte's descrip- 

 tion of arcuatum agrees better with the species described by Hay- 

 ward as graciliforme, than it does with the dentellum of the latter 

 author, for he says, " thorax strongly sinuate behind " and the elytra 

 "elongate-oval"; neither of these phrases could be used so fittingly 

 for the specimens at hand believed to be dentellum (Hayw.), in which 

 the sides of the thorax are feebly sinuate and the elytra rather broad 

 and oblong. It seems that Hayward may have been influenced by 

 the above quoted description of Leconte's which is probably mis- 

 printed. As it stands it reads, "This species {arcuatum) resembles 

 B. flammulatum (dentellum) of Europe, but is wider and less con- 

 vex." This sentence is unintelligible taken in connection with the 

 specimens. If, however, the last clause be changed to read, "but 

 (the latter — namely, dentellum) is wider and less convex," the de- 

 scription agrees with the specimens and with Hayward's description 

 of graciliforme. The species, therefore, which Hayward calls den- 

 tellum is probably neither that species nor arcuatum. It might be 

 incrematum; nothing in the original description of the latter conflicts, 

 but in the portion of the description of arcuatum quoted, Leconte 

 states that the striae are finer and less strongly punctured in incre- 

 matum. Hayward makes no distinction in this respect between the 

 two species he describes, nor is any such difference to be found in the 

 specimens at hand. It seems probable that incrematum is allied to 

 approximation and indistinctum in which the striation is distinctly 

 finer. 



Colonel Casey, in his recent work on this genus (Mem. Col., VIII, 

 1918, p. 117), does not apparently recognize Hayward's species. He 



