AMERICAN COLEOPTERA. 417 



G. lineellus, Lee. Proc. Phil. (1861), p. 340.— Allied to A. tceniolalus, but 



thorax entirely red (possibly immature), elytra with four linear vittse, surface 

 with larger and easily visible reticulations. % tarsal claws dentate. 



California. (Leconte.) 



The intermediate tarsi are short, the posterior tibiae with 4-5 punc- 

 tures on the inner margin. 



G. semivittatus, Lee. Ann. Lye. v., p. 204; spilotus, Lee. Col. Kansas, 

 p. 5.— Ovate, rather broad, black, shining; thorax with the sides nearly 

 straight, strongly margined; elytra extremely, finely and obsoletely punctu- 

 late, the dorsal series irregular, rather deeply impressed, confused towards the 

 apex, with a sub-marginal vitta in the apical third (sometimes interrupted) 

 yellow. 'J, anterior claw acutely dentate. L. -35 inch. 



9 var? reticulation large and open, leaving areolae precisely similar to those 

 of A. obtusatuH. 



9 var. elytra closely and roughly reticulate. 



Kansas, Colorado River, Texas, Cauada. 



Intermediate tarsi with the first joint = second and third. Pos- 

 terior tarsi with the first joint longer than second and third, fifth = 

 fourth ; posterior tibiae punctate at the base. 



G. Iiecontei, sp. n. ; discolor, || Lee. Ann. Lye. v., p. 204. — Ovate, black, 

 legs and antennae red ; thorax with the sides rounded, finely margined, rufous, 

 surface reticulate; elytra yellowish-brown, disc darker, minutely punctulate, 

 surface alutaceous under a high power, dorsal punctures well marked, the ac- 

 cessory punctures serially arranged, and forming in all five rows; posterior 

 femora strigulate, tibiae smooth or very obsoletely punctulate. % anterior tar- 

 sal claw with a large acute tooth, tarsi broadly dilated. L. -30 inch. 

 California, Oregon. (Leconte, Horn.) 



G. semipunctatns, Kirby, Faun. B. A. iv., 69.— Ovate, sides rather 

 parallel, surface convex, shining, black ; thorax with the sides hardly rounded, 

 posterior angles almost obtuse; elytra extremely finely reticulate, the areolae 

 hardly visible, dorsal series well marked, with additional punctures inserted in 

 the intervals; posterior tibiae smooth, tarsi very short. anterior tarsal claw 

 with an acute dent. L. "24 inch. 



Lake Superior, Canada, Missouri. (Leconte, Horn.) All the claws 

 very short and weak. 



G. seneolus, sp. n. — Ovate, rufescent, body beneath black, legs and coxal 

 processes red; thorax and elytra shining, tinged with brassy-green; thorax 

 with the sides slightly rounded, strongly margined; elytra finely punctulate 

 and reticulate; the dorsal punctures small, confused towards the apex, epi- 

 pleurae rufescent. % anterior claw with a well marked tooth. L. *23 inch. 



Pennsylvania, Newfoundland. (Leconte.) 



Prosterual process sub cariuate, posterior femora and tibiae puc- 

 tulate. 



