1873.] i-Zo [Horn- 



The three species above form a series that may possibly unite as 

 varities of peregrinus when a large series of specimens has been studied. 



Occurs in North Carolina, Illinois and Missouri. 



B. exilis, Lee. Ann. Lye. V, p. 211 ; Proc. Acad. 1855, p. 366. 



Head brilliantly cupreous, moderately coarsely and densely punctured. 

 Thorax twice as wide as long, surface coarsely punctured, brilliantly 

 cupreous, lateral and apical margins testaceous. Elytra yellowish testa- 

 ceous, very indistinctly maculate, surface rather deeply striate, outer 

 stride deeper, striae coarsely and serrately punctured, intervals slightly 

 convex, sub-rugulose and with a row of moderate punctures, Mucro of 

 mesosternal crest broad at apex. Body beneath piceous black, legs pale 

 testaceous, femora piceous. Length .10-.12 inch ; 2.5-3 mm. 



The mesosternal mucro when seen on its tip apparently splits into two 

 parts in the form of a V, the open portion being posteriorly. 



Gila River, Arizona. 



B. exiguus, Say, (HydropMlm) Journ. Acad. V, p. 189 ; pallescem, 

 Lee. Proc. Acad. 1855, p. 366. 



Color above and below yellowish testaceous. Head coarsely but sparsely 

 punctured. Thorax twice as wide as long, surface very minutely aluta- 

 ceous, coarsely and rather densely punctured. Elytra with moderately 

 deep striae, those of the outer series deeper ; striae coarsely punctured, 

 intervals slightly convex, punctured. Mesosternal mucro at apex acute. 



Pennsylvania to Louisiana. 



B. infuscatus, Lee. Proc. Acad. 1855, p. 365 ; punetulatus, Lee. Ann. 

 Lye. V, p. 211 ; Proc. Acad. 1855, p. 365 ; calif amicus, Motsch. Bull. 

 Mosc. 1859, III, p. 179. 



Color yellowish testaceous above. Head black with bronze lustre, 

 surface very minutely alutaceous, punctulate more densely in front, vertex 

 sub-carinate. Thorax twice as wide as long, surface finely alutaceous, 

 sparsely and equally punctured, color testaceous at middle with a divided 

 fuscous spot. Elytra striate, striae of disc replaced by rows of fine punc- 

 tures, outer striae moderately impressed, punctured, intervals flat very 

 sparsely punctulate, color testaceous obsoletely piceo-maculate. Body 

 beneath piceous, middle and hind femora at base also piceous. Length 

 .20-. 24 inch ; 5-6 mm. 



Male. Surface shining. 



Female. Surface minutely alutaceous between the punctures. 



I am entirely unable to separate the Pacific forms from those found on 

 the Atlantic slope. 



Occurs in all the Gulf States, Colorado, Arizona, and thence to south- 

 eastern California. 



B. striatus, Say, (HydropMlus) Journ. Acad. V, p. 188 ; ordinatus, Lee. 

 Proc. Acad. 1855, p. 365 ; f rater nus, Lee. loc. cit. p. 364. 



Resembles the preceding closely but differs in having the striae of the 

 disc of the elytra distinctly impressed. It is always smaller and more 

 robust than inftiscatus. Length .16-.20 inch ; 4-5 mm. 



