361 PROCEEDINGS OF THE ACADEMY OF 



fuscis aenescentibus, fere obsolete striatis, subovatis thorace baud latioribus, 

 apice late subtruncatis. Long. 6-5 mm. 



Le Conte, List of the Coleoptera of North America, p. 58, (1st issue, 1863). 

 One specimen, collected near San Francisco. California, given me by Dr. G. 

 H. Horn. This species is related to D. mar in us Lee, but is much stouter in 

 form ; the thorax is comparatively larger, and the elytra more obviously sub- 

 truncate. 



The publication of subsequent pages of the work, in which the descriptions 

 of this and the preceding species first appeared, has caused the page above 

 quoted to be cancelled, and I have therefore rendered any future reference 

 to it unnecessary by transferring them to the present memoir. 



APEXES Lee. 



A. nebulosa, depressa picea, opaca, capite thoraceque confertim 

 rugosis et subtiliter punctatis, hoc latitudine sesqui breviore canaliculato 

 postice angustato, angulis posticis obtusis distinctis, basi sinuatim rotundata ; 

 elytris thorace sesqui latioribus, striis impunctatis, interstitiis planis, 3io bi- 

 punctato, fuscis, limbo lato fasciisque duabus obliquis obscure testaceis ; abdo- 

 mine testaceo, antennis palpis pedibusque pallidioribus. Long. 6-5 mm. 



Cape San Lucas. Lower California ; Mr." Xantus Of the same size as A. 

 s i n u a t a, but quite different in color, lustre and sculpture. The elytra are 

 rather broader than in the other species, and the oblique pale bands are not very 

 distinct ; the anterior one runs backwards towards the suture, and the pos- 

 terior one runs forward, producing a resemblance to the markings in some 

 Bembidia of the group Nolaphus. The antenna? are scarcely as long as the 

 head and thorax united ; the claws are feebly pectinate, each being armed 

 with two to three teeth. The rugosities of the head are longitudinal, and 

 quite densely placed, with some intermixed punctures. 



RHOMBODERA Reich. 



R. b i c o 1 o r Lee. I have two specimens from Illinois, which differ from 

 the type by having the head black; they are thus intermediate in color 

 between R. pallipes, in which the head and thorax are black, and R. 

 b i c o 1 o r. in which both are yellow. I prefer regarding all as belonging to 

 one species. 



PTEROSTICHUS Bon. 



P. superciliosus. Feronia superc. Say, Journ. Acad. Xat. Sci. Phila., iii. 

 144, ed. Le Conte, ii. 92. 



A specimen from West Virginia, 15 mm. long., given me by Dr. S. Lewis, 

 differs from P. moestus in having the thorax less narrowed behind, the 

 hind angles more broadly rounded and feebly carinate ; the basal impressions 

 finely punctured, separated from the reflexed margin by the feeble carina just 

 mentioned; the elytra are much less obtuse behind, shining, (at least in the 

 male,) deeply striate and tinged with purple; the third interval has four punc- 

 tures, as in P. m o e s t u s. The outline is nearly the same as in P. s t y g i - 

 c u s, but the thorax is somewhat more narrowed behind. 



In Say's description of Feronia superc. the base of the thorax is said to be 

 "wider than the petiole," and in the description of F. moesta, "not wider than 

 the petiole." The descriptions otherwise accord with each other, and the 

 other distinctive characters between P. moestus and the specimen before 

 me are not mentioned ; yet, as the original types of F. sitperciliosa are 

 destroyed, I prefer rather to adopt the name than to regard the species under 

 consideration as a nondescript. 



The form and sculpture of the thorax is nearly the same as in P. p r o - 

 t e n s u s Lee, (Xew Species of X. Am. Col., 12,) but the form in that species 

 is more elongate, the elytra are more deeply striate, not tinged with purple, 

 and there are but two dorsal punctures. 



[Dec. 



