NATURAL SCIENCES OF PHILADELPHIA. 85 



A genus having very much the form of Telephanus, but differing by 

 the cylindrical palpi, aud small fourth joint of the tarsi : as habitual charac- 

 ters, the body is more densely punctured, and the head each side has a longi- 

 tudinal line running from the base of the antennae. 



16. P. signatus, elongatus, testaceus, pubescens, capite thoraceque 

 dense punctulatis, hoc latitudine longiore lateribus rectis serrulatis, angulo 

 utrinque prope apicem obtuso, disco postice vage impresso, punctis versus 

 basin majoribus ; elytris basi truncatis, humeris obtusis, striis punctatis, pos- 

 tice fere obliteratis, interstitiis dense punctatis, 4to, 6to et 8vopaulo latioribus, 

 plaga scutellari, altera communi ad medium, guttaque utrinque postica 

 cum mediali connexa nigricantibus ; antennarum articulis 8, 9 et 10 infusca- 

 tis. Long. '18. 



Puget Sound, Mr. Davidson. A very pretty little insect : the markings on 

 the elytra present a scutellar triangle, and a medial spot having the form of 

 the head of an arrow. 



17. Ceruchus striatus, piceo-niger, nitidus, capite thoraceque grosse 

 parcius punctatis, fronte late concava, elytris striis profundis in fundo densius, 

 costis parcius grosse punctatis, antemiis rufis. Long. '68. 



One female, found at Shoalwater Bay, by Dr. Cooper, and another in Wash- 

 ington Territory, by Mr. Gibbs. Resembles in proportions C. piceus, but 

 is much larger : the thorax is more convex and the elytra more deeply striate 

 and much more punctured. 



18. Corymbetes tinctus. Several specimens of a species were found by 

 Dr. Kennerly and Mr. Gibbs, in Washington Territory, having the elytra of a 

 metallic green or purplish color. These resemble closely in appearance C. 

 aeripennis, and differ only by the thorax being less narrowed in front, more 

 broadly rounded on the sides, and by the stria? of the elytra being deeper, the 

 interstices slightly convex and more rugous, and by the feet being piceous 

 tinged with rufous. C. c a r b o , besides having both body and feet entirely 

 black, has the thorax still less narrowed in front, more strongly punctured, 

 and the prosternum more coarsely punctured. 



19. Corymbetes profractus, elongatus, linearis, piceo-niger, thorace lon- 

 gius elytris breviter cano-pubescentibus, illo latitudine fere sesqui longiore, 

 parum convexo, crebre punctato, lateribus rectis fere parallelis, angulis posti- 

 cis acutis divergentibus, haud carinatis, elytris striatis, interstitiis convexis 

 confertim punctatis, antennis articulo 3io 4to sequali. Long. "58. 



Oregon, Dr. Cooper. A very distinct species having the form of the male of 

 C. pyrrhos. 



20. Dolopius opaculus, testaceo-piceus, opacus, helvo-pubescens, tho- 

 race lateribus postice pallidioribus dense punctato, paulo convexo, latitudine 

 sublongiore, antrorsum sensim angustato, lateribus ante medium rotundatis, 

 angulis posticis acutis carinatis, ante scutellum breviter canaliculato, elytris a 

 basi sensim angustatis, striis punctatis, interstitiis vix convexis, confertissime 

 punctatis ; coxis posticis laminis intus subito dilatatis, pedibus antennisque 

 fere testaceis, his articulis 2 et 3 aequalibus, singulis 4to paulo brevioribus. 

 Long. -27. 



One specimen, Puget Sound, Mr. Davidson. Distinct from all others in my 

 collection, by its form, which approaches that of the small Monocrepidii with 

 simple tarsi, (M. dorsalis, &c.) 



21. Elater tartareus, niger opacus, cuneiformis, breviter nigro-pubes- 

 cens, thorace confertissime punctato, latitudine longiore paulo convexo, an- 

 trorsum sensim angustato, lateribus late rotundatis, elytris striis punctatis, 

 interstitiis confertim scabro-punctatis, antennis valde serratis, articulis 2 et 3 

 parvis sequalibus. Long. '39. 



Puget Sound, Mr. Davidson. Belongs to my division A. (Trans. Am. Phil. 

 Sac. 10, 463,) and is related toE. turbulentus Lee. 



1859.] 7 



