NATURAL SCIENCES OF PHILADELPHIA. 77 



(•12, Thorace oblongo, elytrorum striis postice sub- 



obliteratis 23. sublaevis Putz. 



•14, Thorace ovato, elytroruoi striis postice suboblite- 



ratis ; clypeo paruin deutato 24. dcntiger Lee. 



•12, Thorace ovato, elytrorum striis postice oblitera- 



tis ; clypeo acute bideutato 25. aratus Lee. 



•11, Thorace ovali, elytrorum striis postice oblitera- 



tis; clypeo truncato 2G. rufiventris Lee. 



C. Elytra interstitiis 3io, 5to, ct tmo punctis setiferis uniscriatis. 



•12, Thorace breviter ovato, elytris striis vix impres- 



sis postice obliteratis 27. setosus Lcc. 



•14, Thorace globoso, elytris striis impressis, internis 



subintegris 28. pilosus Lee. 



Two species from Russian America, D. transraarinus Mann, and D. 

 frigid us Mann. Bull. Mosc. 1853, Nos. 11 and 12, appear quite distinct from 

 suiy above described, but the characters given are not such as enable me to 

 place them in the tabic 



I. D. convezus Lee. Ann. Lye. 5, ID.*}, is a variety of D. tridentatus with 

 more flattened elytral intervals. 



6. Z>. apicalis ||Lec. Agass. Lake Sup. 204, is changed to D. n i g rip e s Lee. 

 Trans. Am. Phil. Soc. 10, 396. 



10. D. p u m i 1 u s Putz. is perhaps D. 1 o n g u 1 u s Lee, but the description 

 is hardly sufiBcient. 



II. D. parvus Lee. Agass. Lac. Sup. 204, is merely a small variety of D. 

 glob ulosus. 



3. D. basalis, nigro-aeneus, nitidus, clypeo trilobato, lobo medio breviore 

 obtuso, vertice subtilissime cristato, thorace globoso, elytris thorace sublatior- 

 ibus, striis antice punctatis, postice integris, ad apicem exaralis, marginali per 

 basin continuata, interstitio 3io tripunctato, antenuis fuscis, basi pedibusque 

 rufis, tibiis anticis dente inferiore acuto, superiore minuto. Long. -13. 



Fort Yuma, Colorado River, California. This species has the form, size and 

 sculpture of D. integer ice, from the same locality, but difl'ers by the more 

 globose thorax, and trilobed clypeus ; the anterior thighs of D. integer are also 

 nearly black, while in the present they are dark red. The marginal stria in D. 

 integer ceases at the humerus : in the present it is disti\ictly continued along the 

 base: the dors.al striae do not completely attain the anterior declivity, thej 

 are punctured behind the middle, then smooth to the tip ; although not deep 

 they are entire, and the first, second, seventh and eighth, are deeper at the apex : 

 the eighth is obliterated for the rest of its course as usual. The upper tooth of 

 the anterior tibiae is very small, the second one is prominent, the terminal is as 

 long as the terminal spur, and both are slightly curved. 



8. D. g i b b i p e n n i s, elongatus nigro-aeneus pernitidus, clypeo late emar- 

 ginato, angulis prominulis, fronte transversira paulo impressa, et dein plica 

 parva brevissima notata, thorace latitudine baud breviore, globoso, elytris tri- 

 punctatis, pone basin impressis, striis punctatis baud impressis, externis postice 

 exaratis, antennarum basi pedibusque obscure rufis, tibiis anticis bidenticulatis. 

 Long '15. 



One specimen found at San Diego, California. More robust than D. terminatu?, 

 but more slender than D. globulosus, having about the proportions of D. n i g r i - 

 pes Lcc. Black, more bronzed than usual, and very shining ; head with deep 

 frontal impressions, and a slight transverse line in front of the eyes, which con- 

 nects with an almost imperceptible medial fold: clypeus broadly enmrginate, 

 truncate at the middle, with the angles distinct, not very acute: lateral margin 

 lobed, as usual. Palpi and antennae piceous, the latter obscure rufous at the 

 base. Thorax almost exactlv globose, slightly truncate in front, anterior trans- 

 1857.] 



