ISO PROC. ENT. SOC. WASH., VOL. 21, NO. 8, NOV., 1919 



smaller and in having differently colored antennae and legs as 

 well as a relatively smaller head. 



Asaphidion yukonense, sp. nov. 



Form oblong, moderately elongate. Color blackish green, metallic, 

 strongly shining, pubescence short, scant and silvery. Antennae and penul- 

 timate joint of the maxillary palpi dark, legs rufescent, tibiae and tarsi bluish 

 with metallic reflections. Head large, about as wide as the prothorax, 

 front rugosely and confluently punctured, not carinate nor impressed. Pro- 

 thorax cordate, about three-fourths as long as wide, broadest well in front 

 of the middle, base and apex truncate, the latter perceptibly wider, sides 

 strongly rounded, more rapidly narrowing posteriorly. Antebasal sinuation 

 strong, hind angles sharply rectangular, front angles obtuse. The marginal 

 bead is strong and the sides are distinctly reflexed near the base. Surface 

 coarsely and in part confluently punctured, more closely laterally. Median 

 longitudinal line deeply impressed, distinct from the basal constriction almost 

 to the 'apex. Basal foveae rather deep but vaguely defined. Elytra con- 

 jointly a little more than one and one-half times as long as wide, oblong, 

 very little broadened posteriorly, brilliantly polished and with moderate or 

 coarse often confluent golden punctures, fairly closely placed and so arranged 

 as to form four nearly evenly spaced irregular bands which are more or less 

 confluent along the suture, the anterior and posterior ones strongly diver- 

 gently oblique, the intermediate ones more transverse. The entire basal 

 area for nearly a fourth of the elytral length is similarly punctured. Each 

 elytron has two large, vague, purplish foveae on the space which represents 

 the position of the third interval. The courses of two or three discal striae 

 can be faintly traced by a subseriate arrangement of a few punctures but 

 the marginal one is scarcely to be made out at all except in its posterior 

 hall", where it is faintly irregularly impressed, and marked by a row of uneven 

 punctures. Body beneath nearly smooth. 



Length, 4 mm. 



Type. United States National Museum No. 22563. It was 

 collected at Yukon Crossing, Yukon Territory, Canada, May 

 24, 1911, by J. M. Jessup. 



The brilliantly shining surface may be due, in part at least, 

 to abrasion. Aside from this it readily separates from A. alas- 

 kanwn by the small size, which would distinguish it immediately 

 from A. elongatum. In comparison with the few foreign species 

 known to me, it is most like the Japanese A. semilucidum Mots., 

 which is a little larger, much flatter, especially in longitudinal 

 profile, more elongate, and which has pale antennae. The type 

 of A, yukonense has lost the median marginal prothoracic setae, 



