AMERICAN COLEOPTERA. 421 



C. — Anterior male claws simple. 



G. pimctatus, Mels. Proc. Phil, ii., 27.— Ovate, convex, shining, black, 

 antennae, legs and upper surface rufo-piceous; disc of thorax and elytra 

 bronzed; thorax with the sides nearly straight, not very finely margined (the 

 basal punctures extend along the side) ; elytra punctulate, (with a high power 

 the interstices are alutaceous) the dorsal series irregular, with numerous acces- 

 sory punctures; prosternal process broad, convex, posterior coxae and tibiae 

 strigulose, obsoletely punctulate, external tibial spur broad and large, femora 

 with the apical angles rather produced. L. '22 inch. 



Pennsylvania, Georgia. Intermediate tarsi with first joint elongate. 



Kecognizable by the punctate surface and large posterior tibial spurs. 

 Leconte refers this to A. seruginosus Aube, but as I think erroneously. 

 The female has the posterior femora broadly emargiuate beneath. 



G. Stagninus, Say, Tr. Am. Phil, ii., 100; striola, Aube, Spec, p. 308.— 

 Broadly ovate, hardly convex, shining black, slightly bronzed, legs paler; tho- 

 rax with the sides but little rounded, strongly margined ; elytra extremely 

 finely reticulate (appearing punctulate with a lower power), with a yellow sub- 

 marginal vitta in the apical half; prosternal process slightly convex, anterior 

 tibiae very short, broad, spinulose. L. -40 inch. 



Pennsylvania. (Leconte.) 



Very close to G. semivittatus but larger, broader, more depressed and 

 the male with simple claws. 



G. obtusatus, Say, Tr. Am. Phil, ii., 99; nitidus || Say, 1. c. 98.— Uni- 

 formly ovate, rather convex, very shining, black, thorax with the sides rounded 

 (especially in the %) ; elytra sculptured with rather large areolae, the dorsal 

 series well marked, posteriorly confused, with a yellow sub-lateral vitta and 

 sub-apical spot; laciniae of the metasternum sub-linear, posterior tibiae with no 

 accessory punctures. % anterior tarsal claws simple. L. -.30 — -32 inch. 



Canada, Lake Superior. (Leconte, Horn.) 



A. nitidus (Say nee. Fabr.) appears to me from description to be 

 merely a specimen of G. obtusatus in which the lateral spots are ob- 

 scured; this species very closely resembles Gf. semivittatus, Lee, but 

 differs in its smaller size and finely margined thorax, as well as in the 

 large areolae of the elytra; but females and varieties of that species 

 occur with precisely similar areolae. 



G. punctulatus, Aube, Spec, p. 332. — Regularly ovate, shining, black, 

 antennae, legs and elytra ferruginous, the latter with the disc darker; thorax 

 brassy, sides rufescent, nearly straight, finely margined, surface irregularly 

 reticulate; elytra hardly visibly alutaceous, finely punctulate, dorsal series 

 rather obsolete, but not irregular; prosternal process convex, posterior coxae 

 and tibiae smooth, spurs short, last joint of tarsi larger than fourth. % anterior 

 claws simple, tarsi very slightly dilated. L. "25 inch. 



Lake Superior. (Leconte.) 



TRANS. AMER. ENT. SOC. (54) JULY, 1873. 



