PTEROSTICHINyE 357 



the third specimen there is a singular abnormality; the ocellate 

 puncture and feeble impression are as in the others, but between 

 the ocellate puncture and the first stria there is an oblique incised 

 line, subparallel to the oblique basal part of the first stria; this 

 oblique line is not connected in any way \vith the ocellate puncture 

 and is presumably wholly adventitious. 



The species described under the name corax by LeConte, from 

 near the Rocky Mountains, I have not seen, but the indications are 

 that it is a distinct species and not a synonym of sodalis; fatua, 

 also placed as a synonym of the latter in the lists, is a perfectly 

 valid species, differing greatly in the basal part of the prothorax 

 and more slender outline. LeConte makes no mention of alter- 

 nating widths of the strial intervals in sodalis; possibly this may have 

 been overlooked, or else the Mississippi Valley form may be specif- 

 ically different from the Pennsylvania type. I have no means of 

 deciding this at present. 



Subgenus Evarthrinus nov. 



The two following species so closely resemble fatua, that they are 

 probably commingled in collections. The body is generally more or 

 less opaque in both sexes. As a group they differ from the preceding 

 part of the genus in having three dorsal punctures on the elytra, 

 instead of the one so invariable in Evarthrus and allied genera. 



Body moderately stout and but feebly ventricose, dull in lustre, with the 

 anterior parts less so, deep black throughout; head notably large, 

 more than two-thirds as wide as the prothorax, with rather prom- 

 inent eyes and deep subparallel sulci; antenna? black, ferruginous 

 only at apex; prothorax a third to two-fifths wider than long, the 

 sides only moderately coarsely reflexed, strongly, subevenly rounded 

 to the constriction, thence parallel in basal seventh or eighth to 

 the right but bluntly rounded angles; surface with some ruguliform 

 lines, the anterior incised line deep, entire; fovese forming an oblong 

 concavity, the carina long, close to the edge; base three-fourths the 

 maximum width and evidently narrower than the sinuate apex; 

 elytra two-thirds or more longer than wide, two-fifths wider than 

 the prothorax, the sides gradually rounding from slightly behind 

 the middle; striae distinct, moderately impressed and deeply and con- 

 spicuously though not very coarsely punctate, the scutellar varying 

 from evident to obsolete; intervals not quite flat; three dorsal punc- 

 tures distinct. Length (d 71 9 ) 16.0-18.0 mm.; width 5.8-6.3 mm. 

 Indiana. Three specimens decepta n. sp. 



Body somewhat similar in color and lustre but smaller, not quite so stout 

 and with less developed head, the latter scarcely three-fifths as wide 



