NORTH AMERICAN COLEOPTERA. 227 



0. parallelus u- sp.— Narrow, rather depressed; sides parallel; piceous- 

 black throughout; legs rafo-piceous; tarsi and autennse throughout paler, 

 rufo-fuscons; pubescence fine, rather sparse on the pronotum and elytra, 

 denser and more conspicuous on the head and abdomen ; integuments polislied, 

 head subalutaceous. Head \ery slightly longer than wide; sides distinctly 

 convergent anteriorly from the base, distinctly arcuate behind the eyes; base 

 broadly and extremely feebly arcuate; angles broaily rounded ; surface broadly 

 and feebly convex, very feebly impressed in the middle anteriorly, very mi- 

 nutely and densely punctate, also extremely finely and rather feebly subrugu- 

 lose; punctures not spirser but rather coarser along the middle; antennae 

 slightly shorter than the head and prothorax together; basal joint slightly 

 longer than the next two together, joints two to four sabequal in length, 

 slightly elongate, fifth very slightly shorter, joints five to ten decreasing rap- 

 idly in length, the former distinctly longer than wide, the latter very slightly 

 wider than long. Prothorax very slightly narrower than the head, oblong ; sides 

 extremely feebly convergent from apex to base and nearly straight; anterior 

 angles obtuse and broadly rounded; sides thence very strongly convergent to 

 the nuchal emargination which is two-fifths as wide as the disk and feebly in- 

 curvate; basal angles broadly rounded; disk transversely aud feebly convex, 

 two-fifths longer than wide, rather finely, feebly aud densely punctate; very 

 narrow median area impunctate throughout the length. Elytra at base 

 slightly wider than the pronotum; sides very feebly divergent, feebly arcuate 

 toward the apex; together broadly, angularly and very feebly emarginate be- 

 hind; disk slightly longer than wide aud slightly longer than the pronotum, 

 feebly convex, broadly and feebly impressed on the suture, more particularly 

 near the base, finely, rather densely, evenly and subasperately punctate; su- 

 ture finely margined with an elevated border which becomes rather abruptly 

 less than one-half as wide near the scutellum, where also it is not so strongly 

 elevated. Abdomen at base slightly narrower than the elytra; sides very feebly 

 divergent posteriorly; surface broadly convex, extremely minutely and densely 



subsequent observation, however, of cleaner and more perfect specimens, re- 

 veals the fact that the ligula is tricaspid, hence the statements made upon 

 the apparent relationship of the ganus with Lithocharis (1. c. II, p. 36), 

 which were based primarily upon the assumption of a bideutate ligula most 

 be considered ill-founded. The wide departure of the genus from Scopgeus in 

 general form, but particularly in the relatively wide neck and prosternal struc- 

 ture, is very convincing proof that the time has come for a division of the 

 Soopaeoid species into distinct generic groups, and also points strongly to the 

 advisability of a division of Fthe Ptederini into two sections depending upon 

 the formation of the ligula. 



Although Dr. Sharp has, in the Biologia Centrali-Anericana, correctly 

 placed the genus near Ssopaeus since the above was originally written, I still 

 deem it proper to publish the rectification in the same work in which the 

 error was committed. 



