ROLAND HAYWARD. 47 



as wide as the thorax at apex, alutaceous ; palpi seneo-piceous, more or less testa- 

 ceous at base ; antennae about one-half the length of the body, seneo-piceous, the 

 first joint usually rufous beneath or entirely rufous. Prothorax about one-half 

 wider than long, very distinctly wider at base than apex, slightly rugose at base, 

 transversely wrinkled along the median line and sometimes also at the sides ; 

 transverse impressions moderately distinct; basal impressions broad, deep, feebly 

 bistriate, the outer stria small and close to the angle or sometimes nearly obso- 

 lete; sides with the margin narrowly but distinctly reflexed, slightly arcuate in 

 front, sinuate behind ; hind angles prominent, acute. Elytra less than one-half 

 wider than the thorax, oblong-ovate, deeply striate, with the elevated smooth 

 spaces less marked than in the others of the group and confined to the third in- 

 terval, the outer intervals and tip alutaceous or alutaceo-granulate ; strise deeply 

 punctate, the fourth straight ; intervals slightly convex, especially the outer ones, 

 the third with the foveaj less marked, the first slightly in front of the middle, 

 second about one-third from apex. Beneath dark aeneous, shining. Legs feneo- 

 piceous, the femora at base and the tibiae beneath more or less testaceous. Length 

 '.22-.30 inch ; 6.25-7.5 mm. 



The largest species of the group. It seems to vary less than the 

 other species. Tlie thorax is always very distinctly wider at base 

 than apex, with the hind angles prominent, acute, and sometimes 

 with faint traces of a carina. The basal impressions are feebly bi- 

 striate, the outer stria in some specimens almost obsolete. The ely- 

 tra] striae are deep and very distinctly punctate. The surface is more 

 shining than in the others of the group, and, as a consequence, the 

 elevated smooth spaces, so obvious in litiorale, are here but slightly 

 marked, or almost obsolete, and confined to the third interval. The 

 quadrate foveiB are also usually less marked, being quite feeble in 

 some specimens, while the punctures enclosed by them are larger. 



It is most closely related to lorquini and carinula, but may be 

 readily distinguished by the characters above given, which, with the 

 straight fourth stria of the elytra, will at once separate it from bue- 

 qiiale and littorale. It seems to make the nearest approach to the 

 next group. 



As in B. carinula, the males are much less abundant than the 

 females. 



It is widely distributed, but appears to be nowhere very common. 

 I have known of its occurrence in Vermont, Massachusetts (Lowell ; 

 Springfield), New York (Buffalo), Pennsylvania, Missouri, Arkansas, 

 Montana, California and Washington. 



Group iv. coxendix. 

 MaxillPB with the outer lobe biarticulate. Frontal grooves single, 

 straight and parallel ; eyes large and prominent. Pi-othorax sub- 

 quadrate, either as wide or wider at base than apex, with the basal 



TRANS. AM. ENT. SOC. XXIV. FEBRUARY, 1897. 



