1854.] 



223 



Chalcolepidius W e b b i i , supra niger, nitidus, subtiliter punctulatus, squamis 

 minutis viridi-cyaneis conspersus, thoracis lateribus elytrorum basi et lateribus 

 pabe depressa albida densissime vestitis, antennis fortiter serratis, articulo 2ndo 

 minuto, 3io sequente baud breviore, elytris striis subtiliter punctatis vix irupressis. 

 Long. *95 1*4:7. 



As a slight testimony of my appreciation of the valuable labors of Dr. Webb 

 vrhile connected with the Boundary Commission, I have dedicated to him this 

 very tine species : several specimens were obtained on the journey from San Diego 

 to El Paso, and also on the San Diego trip. The thorax is about one fourth 

 longer tran wide, with the sides in the female nearly parallel from the base to 

 within one fourth of the apex, where they converge obliquely and are slightly 

 rounded. The posterior angles are very slightly prolonged, and are somewhat 

 acute, notcarinated. The ecutellum is cordate, wider posteriorly, and emarginate 

 at each end. The elytra gradually taper from the base, are slightly rounded on 

 the sides, and suddenly rounded at the tip : the stria: are very faint, and are finely 

 punctured. 



The thorax of the male is more gradually narrowed anteriorly, and the antennse 

 extend to the posterior fourth of the thorax, while in the female they reach only 

 to the middle : in both sexes the third joint, though as long, is not as wide as 

 the fourth. 



Chalcolepidius smaragdinus, elongatus niger nitidus, dense subtiliter 

 punctatus,undique squamulis la?te viridi-aureis dense tectus, antennis pedibusque 

 cyaneis, illis articulis 2 et 3 minutis, thorace latitudine sesqui longiore lateribus 

 antice late rotundatis, scutello obovato, elytris striis fere obsoletis subtilius punc- 

 tatis. Long. -9 1-07. 



San Diego trip. -Similar in form to C. viridipilis, but with the thorax much 

 less suddenly rounded towards the tip: the elytra are also very faintly striate, 

 and the striee not deeply punctured. The sc*ttellum is not emarginate at either 

 end. 



As in C. viridipilis the antennae of the male are as long as the thorax, and almost 

 flabellate. 



Pelecyphorns r i m a t u s, niger, thorace latitudine duplo breviore disco paulo 

 convexo subtilius disperse punctato, lateribus magis rotundatis confiuenter rugosis 

 late depressis, angulis posticis obtusis baud rotundatis, elytris ovatis, thorace vix 

 latioribus postice declivibus dorso subplanis grossius puuetatis subrugosis, 

 lateribus acute marginatis, epipleuris parce obsolete punctatis. Long. 1-0. 



One specimen from Camp No. 7. This species is very different from any of the 

 other Asidites of our country, though it approaches the species indicated by me 

 under the name subcostatus (Proc. Acad. 6, 446) : the elytra are however 

 more densely and coarsely punctured, and without the three faint ribs seen in 

 that species. The antennas are shorter than the head and thorax, and moderately 

 thick, as in P. carinatus, sordidus, &c. 



Pelecypborus d i f f o r m i s , niger, thorace latitudine paulo breviore, lateribus 

 late sensim reflexis, antice rotundatis medio angulatis, dein usque ad basin con- 

 cavis, basi truncato, angulis posticis fere rectis, disco parcius subtiliter, lateribus 

 grossius et rugose puLCtatis, elytris thorace vix latioribus, elongato-ovalibus 

 postice acuminatis, minus profunde scabro-punctatis striis distinctis latis modice 

 profundis, humeris minutis porrectis, epipleuris subito reflexis. Long. .95. 



Santa Cruz, two specimens: in one the thorax is slightly concave transversely, 

 while in the other the sides are considerably elevated. This species is closely 

 allied to P. elatus Lee. (Proc. Acad. G, 445) but is smaller and narrower, and 

 at once distinguished by the distinctly striate elytra: the stria? in the other species 

 mentioned, if present, are always very faint. 



Euschide3 1 i r a t u s , latiusculus ater opacus, minus convexus, supra bre-nter 

 fiavo-pubescens, thorace latitudine sesqui breviore, antrorsum angustato, lateribus 

 rotundatis incrassatis et refiexo-marginatis, angulis anticis acutis, basi truncato, 

 angulis posticis subrectis, dorso inaequali confertim punctato, medio angustecari- 



