l'?2 GEO. H. HORN, M. D. 



angles of the thorax being distinct and not obtusely rounded, its 

 more elongate form and by the smoothness of the basal sculpture 

 of the thorax. 



Occurs from Canada to Maryland. 



SCAPHINOTUS Latr. 



Head elongate, eyes usually moderately prominent, genae not dilated, 

 base of maxillae exposed and visible from above, gula not transversely 

 impressed. Antennae slender, as long as three-fourths of the body, 

 first joint longer than the third. Elytra striate, striae punctured, 

 intervals very slightly interrupted. Anterior tarsi moderately dilated 

 in the male the first three joints either papillose or spongy pubescent 

 beneath. 



Irichroa Newm., is synonymous with the above. 



The tarsal characters of the male are here useful in arranging 

 the species. 



Anterior tarsi % moderately dilated, the first three joints papillose beneath. 

 Thorax very widely margined, the hind angles prolonged backwards. 

 First joint % anterior tarsi papillose over three-fourths of its sur- 

 face elevatus. 



Thorax with moderately widely reflexed margin. First joint % anterior 



tarsus with a slight papillose space at tip vitlliilS. 



Thorax with very narrow margin. 



Anterior tarsus % as in viduus Gnyotii. 



Anterior tarsus % as in elevatus ISidJiigsi. 



Anterior tarsi of % more distinctly dilated and densely spongy pubescent be- 

 neath, the first joint so clothed over nearly its entire surface. 

 Thorax very narrowly margined AnUrewsii. 



C (ScapMnotus) elevatus Fab., Mant. i, p. 198; Knoch, Neue Beitr. i, 

 p. 188, pi. 8, fig. 12; Lac. Genera Atlas, pi. 2, fig. 4; unicolor Fab., loc. cit.; 

 Oliv. Ent. iii, 35, p. 47, pi. 6, fig. 62; flammeus Hald., Proc. Acad, ii, p. 54; Lee. 

 Ann. Lye. iv, p. 440; dilatatus Lcc, Trans. Am. Philos. Soc. x, p. 398; var. 

 heros Harris, Bost. Journ. ii, p. 196; Lee. Journ. Acad, iv, pi. 4, fig. 13. — Form 

 moderately robust, color variable from bluish to bright cupreous. Head moder- 

 ately elongate, eyes prominent. Thorax (less the margin) cordate, sides in 

 front arcuate posteriorly oblique, margin broad more or less reflexed, much 

 wider posteriorly, the hind angles prolonged over the elytra, disc of thorax 

 variable in convexity and impressions, surface slightly wrinkled, margin more 

 or less punctate. Elytra broadly oval, moderately convex, margin reflexed, 

 gradually narrower towards the tip, surface moderately deeply 16 — 18 striate, 

 strife crenately punctured, intervals moderatelj' convex slightly confused at the 

 sides and tip. Inflexed portion of elytra moderately densely punctate. Body 

 beneath and legs smooth, shining. Length .60 — 1.12 inch; 15 — 28 mm. 



The color is variable as already stated. The difiierences in appear- 

 ance between heros and the ordinary forms of the species, which have 



