1854.] 225 



which are moderately fine: the thorax is very faintly impressed each side ante- 

 riorly, and the sides are somewhat blackish in most specimens. 



Asclera c a n a, nigra pube subtili cinereo-cana, thorace rufo, obovato latitudine 

 longiore, lateribus ante medium rotundatis dein sensim angustato, maculis tribus 

 anticis infuscatis, dense punctulato, linea angusta dorsali laevi, elytris thorace 

 latioribus confertissime scabro-punctulatis, lineis tribus subelevatis obsoletis, 

 sutura densius pubescente: femoribus bast runs. Long. '34. 



One specimen, San Diego trip. Allied in form and characters to A. t h o r a- 

 cica, and, as in that species, the first joint of the antennae is not longer than 

 the third. 



Ripiphorus rufus, rufo-ferrugineus nitidus, capite parce punctulato, occipite 

 producto obtuse rotundato vix impresso, thorace elytrisque confertim aciculato- 

 punctatis, illo latitudine fere sesqui longiore, antrorsum sensim angustato, late- 

 ribus rectis, basi media longius acute lobata, angulis posticis rectis haud pro- 

 duces ; femoribus tibiisque apice runs. Long. 27. 



One female, San Diego trip. The antennae are brown ; the sides of the occiput 

 converge, and the apex is very obtusely rounded and subtruncate. 



Ophryastes val idus. niger (griseo-squamosns ?) breviter parce pubescens, 

 rostro crasso, basi constricto trisulcato, sulcis lateralibus brevibus profundis 

 postice dilatatis et convergentibus, thorace latitudine duplo breviore, apice basi- 

 que fortiter constricto, lateribus dilatatis obliquis, inaequali foveatim punctato, 

 elytris ovalibus thorace latioribus foveis magnis minus profundis striatim positis 

 notatis, interstitiis paulo convexis, alternatim sublatioribus. Long. -65. 



One specimen, Oct. 20th, (near Chihuahua.) Larger than 0. latirostri"s 

 Lee. (Proc. Acad. 6, 443) and sufficiently distinct from all the species known. 



Ophryastes po r o su s, niger cinereo-squamosus, parce breviter pubescens, 

 rostro crasso, basi parucu constricto, trisulcato, sulcis externis brevibus dilatatis 

 vix convergentibus, thorace latitudine duplo breviore, antrorsum angustiore, 

 utrinque modice constricto, lateribus rotundatis, acute canaliculato, inaequali 

 sat dense foveato, elytris thorace latioribus rotundato-ovalibus, convexis basi 

 truncatis striis foveatim punctatis, interstitiis paulo convexis. Long. -37. 



From the same locality, one specimen. This also differs very materially from 

 all those heretofore known. 



Caelocnemis punctatus niger, subnitidus capite thoraceque sat punctatis, 

 hoc latitudine non breviore, subquadrato, postice subangustato lateribus rotun- 

 datis ad basin breviter sinuatis, angulis posticis rectis prominulis, elytris thorace 

 vix latioribus convexis seriatim punctatis, interstitiis subtiliter <*ugulosis sat 

 dense punctatis. Long. '83. 



One specimen, from Lieut. Beckwith's Collection alontr lat. 38 ; probably 

 from Utah, as the genus has not heretofore occurred east of California. This 

 species is more elongated than usual, and differs from all the others known to 

 me by the thorax being less rounded on the sides and less narrowed behind, so 

 that it does not present the cordate form seen in C. dilaticollis, &c. The punctures 

 of the interstices of the elytra are very distinct, and although smaller than those 

 arranged in the rows, are so dense as to render the striae indistinct. 



C. californica Mann, is unknown to me, and from the figure given (Mas. 

 Zool. 1844) approaches more nearly to this species in form ; the thorax, however, 

 appears to be more rounded and cordate. The elytra of that species are described 

 as having nine rows of punctures, while in C. dilaticollis Mann, only 

 eight rows are mentioned ; the fact is, that in all the species nine rows are seen, 

 but the marginal row in one description was omitted ; in cases when two species of 

 the same genus have a different number of striae on the elytra, the change is pro- 

 duced by some of the striae becoming obsolete, and the situation of the obsolete 

 striae can always be determined ; no phenomenon of the kind is to be expected 

 in this genus. 



