NORTH AMERICAN BUPRESTID BEETLES 153 



This species is closely allied to niveiventrts Horn, and fulminans 

 Fisher. From the former it differs in being more shining above, the 

 pubescent spots on the eyltra more distinct, and the larvae live in 

 poplar and cottonwood. In fvlmincms the pubescence on the sides 

 of the abdomen form more or less distinct spots, the size is smaller 

 and more uniform, the males have the first abdominal segment flat- 

 tened, and the second segment with a vaguely depressed smooth space 

 at the middle on the basal half, and the larvae live in willow. 



48. AGRILUS BETULAE, new species 



Male.—Fovm similar to that of anxius Gory, but slightly more 

 slender, rather strongly flattened above, and feebly shining; head 

 aeneous in front and becoming cupreous on the occiput; pronotum 

 and elytra bottle green with a distinct purplish tinge, especially to- 

 ward the sides; beneath cupreous, with a feeble purplish reflection, 

 and more shining than above. 



Head with the front rather narrow, nearly flat, and about equal 

 in width at top and bottom, and lateral margins broadly, arcuately 

 expanded at middle, and without a distinct longitudinal groove; 

 surface finely, densely punctate, and densely clothed with long, re- 

 cumbent, yellowish pubescence, which nearly conceals the surface; 

 epistoma broadly and rather deeply, arcuately emarginate in front; 

 antennae extending to middle of pronotum, serrate from the fourth 

 joint, and the outer joints slightly longer than wide; eyes large, 

 broadly elongate, and about equally rounded above and beneath. 



Pronotum two-fifths wider than long, base and apex about equal in 

 width, and widest at middle; sides arcuately rounded from apical 

 angles to base; when viewed from the side the marginal and sub- 

 marginal carinae are strongly sinuate, narrowly separated anteriorly, 

 and connected to each other behind the middle; anterior margin 

 strongly sinuate, and the median lobe broadly rounded ; base broadly 

 emarginate at middle of each elytron, the median lobe broadly 

 rounded, and subtruncate in front of scutellum; disk moderately 

 convex, a more or less distinct median depression composed of two 

 parts, a round depression on each side of middle anteriorly, and with 

 broad, shallow lateral depressions, and sharply defined, arcuate pre- 

 humeral carinae; surface coarsely, closely, and deeply transversely 

 rugose, with numerous punctures between the rugae, and sparsely 

 clothed with short, semierect, whitish hairs. Scutellum rather 

 strongly, transversely carinate, and the surface finely, densely 

 reticulate. 



Elytra slightly wider than pronotum at base, and about equal in 

 width at base and behind the middle; sides vaguely rounded for a 

 short distance behind base, broadly constricted in front of middle, 



