CETONIIN.E 281 



yellowish olivaceous, the under surface and legs, excepting the 

 tarsi, brilliant bluish-green, with cupreous reflection which becomes 

 gradually stronger laterally; head small, nearly flat, opaque, oli- 

 vaceous, slightly green and more shining toward the sides of the 

 clypeus, which are barely at all elevated, the apex sharply and 

 strongly reflexed, broadly rounded, becoming feebly sinuate 

 medially; surface throughout with small sparse equal rounded 

 punctures; prothorax and mes-epimera uniformly opaque oli- 

 vaceous throughout, having throughout very sparse punctures, 

 minute medially, stronger but never at all widely arcuate toward 

 the sides, strong but simple on the mes-epimera; elytra about a 

 third longer than wide, the suture strongly elevated except basally, 

 not produced at apex, the angles sharply right; disk of each with 

 the usual two feeble costules and with very fine sparse punctures, 

 obsolete inwardly, and with a few intermingled toward the humeri 

 which are crescentic but not at all strikingly so; pygidium opaque 

 olivaceous-green, with a large cupreous transverse subapical area, 

 having throughout well spaced and fine, vermiculate, sharply 

 incised lines, blackish in color and bearing extremely minute erect 

 inconspicuous setae, only discoverable under very oblique angle 

 of view; sterna, except medially, hind coxae and femora with sparse 

 and very coarse arcuate punctures, those of the abdomen similarly 

 sparse but not so large; anterior tibiae tridentate, the teeth very 

 short and broadly obtuse; hind tarsi slender, almost as long as 

 the tibiae. Length (cf) 15.0 mm.; width 8.3 mm. Arizona 



(Nogales), Oslar laetula n. subsp. 



Under surface glossy black almost throughout in both sexes 5 



5 Basal lobe of the prothorax broader, at base half as wide as the maxi- 

 mum thoracic width. Body depressed, elongate, subcuneiform, pale 

 ochreous-brown and opaque evenly throughout above, the shining 

 black under surface with the meta-parapleura alone partially ochra- 

 ceo-opaqtfe; head feebly convex along the median line, opaque, 

 ochreous, with fine scattered punctures, becoming shining black and 

 strongly, closely punctate at the sides and apex, the latter very 

 thick but not reflexed and deeply sinuate medially; black sides not 

 elevated, sloping downward externally; prothorax as usual in the 

 cinerea section, having a narrow polished black side margin, very 

 different from the conformation of the sides in the chevrolati section, 

 uniformly ochreous, having some very small sparse punctures, which, 

 toward the sides, become but little larger though crescentic and with 

 a row of crescentic punctures attached to the elevated lateral bead 

 before the middle; apical margin unmodified; elytra two-fifths longer 

 than wide, uniform in color, the suture strongly elevated posteriorly, 

 the two discal lines very feeble, having some very fine punctures 

 confined to the central part of the disk and thence posteriorly in the 

 concavity adjoining the elevated suture, which is very evidently 

 though obtusely produced at apex; sides almost straight, converging 

 from base to the abruptly very obtuse apex; pygidium in both sexes 

 feebly convex, smooth and densely ochraceo-opaque in about apical 

 three-fourths, this ochreous area with a few short transverse incised 



