56 MEMOIRS ON THE COLEOPTERA 



Nebria lacustris n. sp. Coloration and lustre throughout as in pallipes 

 but shorter in form and with relatively smaller head and prothorax; 

 head with two smooth impressions anteriorly; antennae three-fifths as 

 long as the body; prothorax as in pallipes but less broadly rounded at 

 the sides anteriorly, the posterior oblique part rather longer and the sides 

 more broadly though not more strongly reflexed; elytra similar though 

 exceeding the prothorax much more decidedly in width and with the 

 punctures of the deeply impressed striae coarser and more evident; 

 apices of the elytra in both sexes very acutely angulate, the truncature 

 thence to the suture extremely oblique and feebly sinuate. Length 9.7- 

 10.2 mm.; width 3.9-4.3 mm. Wisconsin (Bayfield) and Minnesota. 



The difference in form of the elytral apices is radical, but the 

 species is also distinct from pallipes in its smaller size, shorter form, 

 relatively smaller anterior parts, stronger strial punctures and more 

 strongly rounded and broadly reflexed sides of the prothorax. 

 LeConte evidently recognized this species as his "race 2 " of pallipes 

 (Bull. U. S. Surv., p. 477) because of its divergence from pallipes 

 in certain general external features. 



Nebria expansa n. sp. Coloration and general characters of form, 

 sculpture and lustre nearly as in pallipes, but larger, with more elongate- 

 oblong elytra and much broader and more anteriorly inflated prothorax; 

 head nearly similar but relatively much smaller; prothorax notably large 

 and transverse, almost twice as wide as long, the sides strongly rounded 

 anteriorly, strongly oblique and broadly, just visibly sinuate thence to 

 the very obtuse angles; surface with the sides very broadly concave and 

 strongly reflexed; anterior and basal transverse impressions conspicuously 

 deep; base relatively narrower than in pallipes; elytra more elongate, 

 parallel, less rounded at the sides, two-fifths wider than the prothorax, 

 the striae as in pallipes, except that the punctures are less evident and 

 generally subobsolete suturally; apices exactly as in lacustris. Length 

 1 1. o mm.; width 4. 6-4. 7 mm. Texas and Indiana. Two female examples. 



Distinguishable at once from pallipes by the elytral apices, 

 larger size and much broader prothorax ; from lacustris by the larger 

 size, feebler elytral punctures and relatively much larger prothorax. 



Carabus Linne. 



This genus, so remarkably developed in the palaearctic fauna, is 

 comparatively undeveloped in North America and it is long since 

 any allusion to our species has been made in a systematic way. 

 Meanwhile there have been a number of forms in my collection that 

 I have not been able to identify, and as they are probably un- 

 described, the present occasion is utilized to bring them forward. 



