NORTH AMERICAN BUPRESTID BEETLES 129 



pubescent spot at the sides of the segments; first segment broadly 

 flattened at middle, the second with a deep, smooth groove extending 

 from the anterior margin to behind the middle ; last segment broadly 

 rounded at apex ; vertical portions of the segments clothed with mod- 

 erately long, recumbent, whitish pubescence, except the second, which 

 is glabrous ; pygidium coarsely punctate, strongly carinate, the carina 

 projecting and truncate at apex. Prosternum sparsely, finely punc- 

 tate, somewhat rugose, and sparsely clothed with very short, white 

 hairs; prosternal lobe broad, strongly declivous, broadly rounded in 

 front, and sometimes with a very feeble emargination at the middle ; 

 prosternal process broad, surface sometimes feebly, longitudinally 

 impressed, the sides parallel to behind the coxal cavities, then strongly 

 attenuate to the apex, which is acute. Tibiae slender, nearly straight 

 (sometimes the anterior pair feebly arcuate), anterior and middle 

 pairs with a small tooth on inner margin at apex, the posterior pair 

 simple. Posterior tarsi distinctly shorter than tibiae, the first joint 

 about equal in length to the following three joints united. Tarsal 

 claws dissimilar, the anterior and middle pairs cleft near the tip, 

 and the teeth nearly equal in length; posterior claws more deeply 

 cleft, and the teeth feebly turned inward. 



Female. — Similar to the male, but is more robust, front of head 

 wider, the sides more parallel, and about equal in width at bottom and 

 top ; eyes narrower, and equally rounded above and beneath ; antennae 

 slightly shorter ; first and second abdominal segments convex and not 

 grooved at the middle, and the tarsal claws similar on all feet, cleft 

 near the middle, the teeth about equal in length, the inner tooth 

 slightly turned inward, but the tips distant. 



Length, 7.5-10 mm. ; width, 1-75-2.75 mm. 



Type locality. — Of acutipennis, North America; type presumably 

 in the Dejean Collection. Of latebrus, Carolina; present location 

 of type unknown to writer. 



Distribution. — Material has been examined from Canada (Ontario 

 and Quebec), and from various localities in the following States: 

 Colorado, Connecticut, Florida, Illinois, Indiana, Iowa, Kansas, 

 Massachusetts, Maine, Michigan, Missouri, New Jersey, New York, 

 North Carolina, Ohio, Pennsylvania, Texas, Virginia, and Wisconsin. 



Valuations. — This species is more or less variable, the color vary- 

 ing from a brilliant blue to black. The depressions on the pronotum 

 show considerable variation, and the prehumeral carinae are vaguely 

 indicated in some examples, but they are very obtuse and more of the 

 form of a swelling than a carina, and the tips of the elytra are usually 

 broadly rounded, but occasionally a specimen is found in which the 

 tips are subacute. 



Hosts. — The larval habits of this species are unknown, but the 

 adults have been collected on oak (Quercus sp.), birch (Betula sp.), 



