1855.] 365 



thorax is more densely punctured; the small punctures of the elytra are scattered, 

 and the large ones more distinct. 



8. B. s t r i at u s, supra griseo-testaceus, saepe obscurus, nitidus ovalis con- 

 vexus, capite acneo sat dense punctato, thorace modice punctato, vittis duabus 

 saepe confluentibus f'uscis, elytris griseo-nebulosis, striis postice profundis fortiter 

 punctatis, interstitiis parum convexis, irregulariter uniseriatim punctatis, 3, 5 et 

 7 punctis paucis maioribus impressis, ad apicem rotundatis ; subtus niger, pedi- 

 bus testaceis. Long. -17 -21. 



Say, Jonrn. Acad. Nat. Sc. 5, 188. 



Middle States, abundant; for a typical specimen I owe my acknowledgments 

 to Dr. Melsheirner. This species is nearly related to several others. From the 

 preceding it may be known, as already stated, by the small punctures of the 

 elytra being almost placed in series, by the large punctures of the 3d, 5th and 

 7th intervals being less conspicuous, by the punctures of the stria? being larger, 

 and finally by the thorax being less densely punctured. 



From B. infuscatus it differs by the stria? of the elytra being strongly impressed, 

 especially towards the tip: 



9. B.infuscatus, ovalis, convexus griseo-testaceus, saepe obscurus niti- 

 dus, capite seneo sat dense punctato, thorace modice punctato, vittis dnabus 

 saepe confluentibus notato, elytris griseo-nebulosis, striis subiilibus punctatis 

 postice profundioribus, interstitiis planis uniseriatim irregulariter punctulatis, 

 3, 5 et 7mo punctis paucis maioribus impressis ad apicem rotundatis, subtus 

 niger, pedibus testaceis. Long. -23. 



Middle and Southern States, not rare; specimens from New Orleans were given 

 me by Dr. Schaum and Col. Motschulsky. This species is a little narrower than 

 B. s t r i a t u s, but the most reliable difference is found in the elytral striae, 

 which are fine, and sometimes almost obsolete towards the base. 



10. B. ordinatus, ovalis convexus, supra obscure griseo-testaceus nitidus, 

 capite sat dense punctato asneo, thorace sat. dense punctato, vittis duabus ap- 

 proximatis nigris notato, elytris griseo-nebulosis, striis profundis punctatis pos- 

 tice exaratis, interstitiis planis, internis duobus irregulariter, reliquis fere ordi- 

 natim uniseriatim punctatis ad apicem rotundatis ; subtus niger, pedibus testaceis. 

 Long. -20. 



One specimen, New York. Resembles B. fraternus in having the thorax some- 

 what densely punctured, but differs by the larger size and more regular arrange- 

 ment of the punctures of the intervals of the elytra ; the striae are deep, becoming 

 still deeper towards the tip, and their punctures are smaller and more closely 

 placed than in B. striatus. 



11. B. punctulatus, oblongo-ovalis convexus, supra pallide testaceus 

 nitidus, capite confertim punctato, asneo, thorace modice punctato, tenuiter 



bivittato, elytris striis punctatis postice paulo profundioribus, interstitiis irregu- 

 lariter seriatim punctulatis, 3io punctis paucis maioribus impresso, guttis nigris 

 in seriebus tribus obliquis ornatisad apicem rotundatis; subtus infuscatus, pedi- 

 bus testaceis. Long:. -20. 



Le Conte, Annals of the Lyceum, Nat. Hist. New York, 5, 211. 



Colorado River, California; also found by Dr. i'hos. H. Webb at the Copper- 

 Mines of the Gila. Also resembles the four preceding; the striae of the eljtra 

 are fine and well impressed, growing a little deeper behind ; they arc finely punc- 

 tured, as in B. ordinatus and fraternus, but the interstitial punctuies are much 

 smaller. The thorax is less narrowed anteriorly, so that the body is less attenu- 

 ated in front. The spots of the elytra are arranged in three oblique series ; they 

 are placefl as follows : two on the 2d : three on the 3d ; one on the 4th ; three on 

 the 5th; one (humeral) on the 6th ; and one on the 9th and 10th. According 

 to a specimen sent by Mr. Motschulsky, this is B. californicusl of bis catalogue 

 of Russian ITydrocanthares. The specimen is more shining, and its thorax is 

 more densely punctured, but is hardly sufficiently different to indicate another 

 species ; it was found in the valley of the Sacramento. 



