AMERICAN COLEOPTERA. 173 



caused it to be separated, are practically of no moment whatever. 

 The relative width of the true disc to the dilated margin remains the 

 same while the extent to which it is bent upward varies, so that quite 

 a different appearance may result. 



The differences between this species and viduus are found in the 

 thoracic margin and the anterior tarsi of the male. Here about one- 

 half the first joint is papillose while in viduus merely a small space 

 near the tip. 



Occurs from the Middle Atlantic States to Colorado and thence 

 southward, as a general rule the further south the larger the 

 specimens. 



C. (Scaphinotus) viduus Dej., Species ii, p. 12; wmcoZor f Knoch, Neue 

 Beitr. i, p. 187, pi. 8, fig. 11; Say, Trans. Am. Phil. Soc. ii, p. 71; Leonardi 

 Harris, Bost. Journ. ii, p. 195; violaceus Lee, New Species, 1863, p. 4. — Body 

 black, thorax purplish, elytra purplish or cupreous. Head elongate smooth, 

 eyes moderately prominent. Thorax as wide as long, sides in front moderately 

 arcuate, posteriorly oblique, margin moderately wide, broader at base than 

 apex, hind angles arcuate, variably reflexed, disc at middle nearly smooth, at 

 sides and on the margin sparsely punctate. Elytra ovate narrowed toward 

 the tip, moderately ventricose, margin narrowly reflexed but a little wider 

 near the base, surface deeply striate, strise crenato-punctate, intervals convex, 

 slightly confused at sides and more so at apex, inflexed portion of elytra punc- 

 tate. Body beneath smooth, shining. Length .70 — 1.16 inch; 18 — 29 mm. 



After an examination of the type of violaceus, I became convinced 

 that it is merely a specimen of the present species whose development 

 has been retarded. It agrees in all essential particulars excepting that 

 it is much smaller. The specimen is a male and its tarsal characters 

 are those of viduus and not at all of Andrewsii. 



The States of New York, Pennsylvania and Virginia, are the habitat 

 of this species, especially in the mountainous regions. 



C. (Scaphinotus) Ouyotii Lee, Proc. Acad. 1866, p. 363. — Moderately 

 elongate, black, surface with violaceous tinge. Head elongate, smooth. Thorax 

 as wide as long, cordate, sides in front moderately arcuate, posteriorly oblique, 

 hind angles obtuse, margin narrowly reflexed, disc smooth at middle, punctured 

 at sides and base, basal impression deep. Elytra oval, moderately convex, sur- 

 face deeply striate, strise crenately punctured, intervals at sides very feebly at 

 apex more distinctly confused, margin very narrow, inflexed portion punctured. 

 Body beneath smooth, shining. Length .90 inch; 22.5 mm. 



This species greatly resembles Andrewsii but is of more robust 

 form, and is in fact intermediate between that species and viduus. 

 The margin of the thorax is a little more reflexed than in the former 

 and very much less than in the latter. 



Occurs in the mountainous regions of North Carolina. 



