10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 70 



Length. — 5 to 6 mm. ; width 2.5 to 3.5 mm. 



Type locality. — Fort Tejon, Calif. 



Distribution. — California, Nevada. 



This species differs from Oe. lugens var. lami'pro-cyane.a in its more 

 broadly oval shape, its wide, rounded apex, its shinin*^ pronotum, 

 and very shining, coarsely punctate elytra. There is no trace of yel- 

 low on abdomen. 



Jacoby's Oe. semipurpurea (described from a single Mexican speci- 

 men) is very shining, with pronotum sparsely and yet distinctly punc- 

 tate and elytra more coarsely and densely punctate, and body be- 

 neath entirely dark. It is very closely allied to Oe. violdscen^, and 

 perhaps identical. 



2. OEDIONYCHIS LUGENS LeConte 



Fig. 2 



Oedionychis lugens LeConte, Col. Kans., 1859, p. 24. — Crotch, Proc. Acad. 

 Philadelphia, vol. 25, 1873, p. 61.— Horn, Trans. Amer. Ent. Soc, vol. 16, 

 1889, p. 183. 



Oblong-oval, somewhat convex, varying from dull, lusterless black 

 to black with distinct bluish, purplish, or aeneous luster. Antennae 

 not half the length of body, submoniliform, black, third and fourth 

 joints about equal. Head dull black with antennal sockets pale 

 brown, flat in front with tubercles very indistinct, coarsely punctate 

 about eyes, occiput and front usually more or less smooth, median 

 groove faint and indistinct, interocular space over half width of 

 head, Pronotum over twice as wide as long, arcuately narrowed 

 anteriorly, somewhat convex but not so much as in concinnu, with 

 very narrow, explanate margin wider anteriorly ; finely and sparsely 

 punctate, punctures or lack of punctures on slight elevations forming 

 an indistinct pattern in middle of pronotum. Scutellum rounded, 

 black, shining. Elytra oblong, sides nearly parallel, umbone promi- 

 nences not marked, basal sulcus within well marked; margin very 

 narrow, punctation very faint and fine, nearly invisible, showing 

 chiefly as tiny lines produced by minute confluent punctures; color 

 entirely black, often opaque, sometimes with bluish, purplish, or 

 aeneous luster. Body beneath finely pubescent, black, sometimes with 

 slight bluish luster, sometimes tip of last abdominal segment, oc- 

 casionally margin of other segments, yepowish, abdomen dorsally 

 yellow; tarsi slightly reddish piceous, epipleura dark. 



Length. — 4.5 to 6 mm. ; width 2.5 to 3 mm. 



Type locality. — Santa Fe, N. Mex. 



Distribution. — California, Arizona, New Mexico, Colorado, Mon- 

 tana, British America, Alberta, Arctic region, Hudson Bay. 



