ClCINDELID/E AND CARABID^ 169 



parmatus Say. Again, under Olisthopus cinctus, he writes that the 

 lateral basal impressions of the pronotum are sparsely punctured 

 and the elytra dull reddish-brown, whereas in our usual conception 

 of parmatus, with which cinctus has been merged as a synonym, 

 there is no trace of punctuation and the elytra are strongly varie- 

 gated in color. However, until Say's forms can be known more 

 definitely, it would not be worth while to overturn the prevailing 

 notions of parmatus Say. The American species of Olisthopus are 

 moderately numerous, those in my collection being definable as 

 follows : 



Body somewhat ventricose, the antennae long, very slender and filiform, 

 two-thirds to three-fourths as long as the body 2 



Body more parallel, very small in size, the antennae much shorter, one- 

 half as long as the body or but little more, though filiform and more 

 or less slender 6 



2 Basal impressions of the pronotum longer, sublinear though very 

 broadly concave and extending to basal fourth. Body narrower 

 than in parmatus but similar in coloration, black beneath, with 

 pale legs, shining throughout, the elytra barely at all alutaceous; 

 head black, as wide as long, three-fifths as wide as the prothorax, 

 the eyes large; antennae fuscous, the three basal joints pale; pro- 

 thorax two-fifths wider than long, the sides rounded almost evenly, 

 widest barely before the middle, the base transverse and very moder- 

 ately arcuate, the apex rather deeply sinuate, the basal angles very 

 broadly rounded; surface piceous-black, rufescent laterally, with 

 pale elevated marginal bead; elytra testaceous, black except at the 

 sides and along the sutural interval in a cloud occupying rather more 

 than posterior half and with a transverse testaceous common spot 

 at the centre, oblong-oval, a third longer than wide, nearly one-half 

 wider than the prothorax, together subcircularly rounded at apex, 

 the sinuation obsolete; surface with rather strong and distinctly 

 impressed striae, the two lateral punctulate, the lateral series of 

 foveae broadly interrupted, the scutellar long, continuous with the 

 first stria, the basal part of the latter disconnected, the fovea not 

 distinct, the first and second punctulate basally; intervals feebly 

 convex, the third with three punctures. Length (cf ) 6.5 mm.; width 

 2.6 mm. Wisconsin (Bayfield), Wickham pictus n. sp. 



Basal impressions short, not extending far from the basal margin, always 

 impunctate 3 



3 The impressions small, rounded and foveiform, the prothorax rela- 

 tively large 4 



The impressions outwardly oblique anteriorly from the base and not 

 including a rounded foveiform concavity at the base; prothorax 

 relatively much smaller 5 



4 Body stouter, moderately convex, deep and shining black, the fine 

 elevated marginal bead of the pronotum and the e'ytra and epi- 



