44 AMERICAN COLEOPTERA. 



readily distinguishable by its more convex and slender form, usually 

 smaller size and proportionally longer thorax, which is not wider at 

 base than apex. The elytra are more deeply striate, with the punc- 

 tures of the strise deeper and more distinct. From the other species 

 of the group it may at once be recognized by the sinuate fourth stria 

 of the elytra, as well as by its size and form. 



It is widely distributed throughout the Eastern and Central States, 

 being known to me from New Hampshire, Massachusetts (Spring- 

 iield). New York (xVdirondack Mountains; Buffalo), Ohio, Penn- 

 sylvania, southwestern V irginia , Georgia, Florida, Wisconsin, Iowa, 

 Arkansas and Texas. LeConte (Ann. Lye, 1848, iv, p. 452) records 

 it from the Rocky Mountains. I have never known of its occurrence 

 on the Pacific coast. 



5. B. liitorale Oliv. — Form moderately broarl, feebly convex; color usually 

 more or less coppery bronze, more rarely greenish bronze or nearly black. Head 

 scarcely as wide as the thorax at apex, alutaceo-granulate ; palpi seueo-piceous ; 

 antennae about one-half as long as the body, piceous, the basal joints more 

 or less aeneous, the first rarely paler. Prothorax distinctly wider than long, 

 slightly wider at base than apex, alutaceo-granulate, less distinctly so or not at 

 all on the disc, slightly rugose at base, more or less transversely wrinkled along 

 the median line; apex scarcely emarginate : median line distinct, usually abbre- 

 viated before and behind; transverse impressions distinct; basal impressions 

 moderately deep, unistriate : sides with the margin very narrowly reflexed, slightly 

 arcuate in front, more or less sinuate behind ; hind angles subrectangular. not 

 carinate, or with faint traces of a carina. Elytra rather less than one-half wider 

 than the thorax, nearly as in inseqanle, with the striae less deep and less strongly 

 punctate, and the elevated smooth spaces more marked and usually more numer- 

 ous. Beneath aeneous, shining. Legs aeneo-piceous, the femora at base and 

 sometimes the tibiae more or less testaceous. Length .19-.26 inch ; 4.75-6.5 mm. 



A very variable species. Although usually more or less bronzed, 

 I have seen specimens nearly black, this color being usually corre- 

 lated v.'ith somewhat paler legs. The first joint of the antennse 

 varies from ?eneous to nearly rufous. The fourth stria of the elytra 

 is usually very distinctly sinuate, being sometimes nearly united with 

 the third at about one-fourth from base. Rarely, however, it is but 

 slightly sinuate. The third, fifth and sixth stride are also usually 

 sinuate, though to a less degree. The number and extent of the 

 elevated smooth spaces of the elytra vary considerably, they being 

 either connected or distinct, in some specimens limited to the four 

 inner intervals, in others extending on to the fifth and sixth and 

 even the seventh and eighth, especially towards the tip. The quad- 

 rate fovese are very well marked. The relative width of the thorax 

 as compared with its length varies slightly, as does also its width at 



