CERAMBYCID/E 287 



two large subtransverse concavities, the dense lateral punctures 

 coarser; elytra less evidently more than twice as long as wide, at 

 base not over a third wider than the prothorax, with rather small 

 and widely scattered punctures basally, becoming gradually very 

 coarse, dense and rugulosely confluent apically, where they are not 

 at all isolated or asperate, the pale lines very obtuse and represented 

 only by some detached pallid spots ending slightly behind the middle. 

 Length (9) 16.0 mm.; width 5.0 mm. Wisconsin (Bayfield), 

 Wickham bif ossatum n. sp. 



The differences between these two species can be inferred very 

 readily by a comparison of the descriptions, which are made un- 

 usually full for this purpose; the sculpture of the elytra toward tip 

 is quite different in character in bifossatum. 



Callidium Fabr. 



As restricted by LeConte and apparently also by recent European 

 authorities, this group of species is very homogeneous, having a 

 rather broad, oblong and feebly convex body, with more transverse 

 and laterally rounded prothorax than in any Phymatodes. It is 

 probable that the genus originated on the North American continent 

 and spread from the Atlantic regions to Europe; I infer this, at 

 least, on discovering that our west coast form, hitherto mingled with 

 the eastern representatives of antennatum, is subspecifically dif- 

 ferent. Our species excepting a few not at present before me, may 

 be separated as follows: 



Antennae very much longer in the male than in the female, somewhat 

 incrassate basally and with the basal joint notably thick; prothorax 

 with the lateral part very finely, densely and rugulosely punctate 

 and opaque, especially in the male, the median part less opaque or 

 alutaceous, feebly and loosely punctate and separated from the 

 opaque area by a clear and abrupt line, which is sinuated just 



behind the middle 2 



Antennae apparently differing but little sexually; sculpture diversified. .3 

 2 Oblong, very dull in lustre and deep obscure blue throughout above, 

 parallel; antennae (o 71 ) fully as long as the body; prothorax in that 

 sex fully as wide as the elytra to a little wider; elytra feebly and ar- 

 cuately narrowed apically to the broadly rounded apices, very densely 

 but shallowly punctate and each with two fine but very distinctly 

 defined raised lines, the punctures apically becoming rather confused 

 and not well defined; prosternum (cf), opaque, very finely and 

 densely, subconfluently punctate. Length 12.5-14.0 mm.; width 

 4.4-4.8 mm. Atlantic regions. [ C. antennatum Newm., Ent. Mag., 



V, 1838, p. 393] antennatum Newm. 



A similar but not quite so broad, very similar in general size, form 

 and facies, but with the antennae (cf) not so long, being a little 



