Coleopterological Notices, V, 387 



semi-membranous margin. In the male the sixth ventral plate has 

 two small feeble teeth on the apical edge, separated by one-third of 

 the total width ; the seventh is prolonged in the middle in a lignli- 

 form process which is as long as wide, gradually narrowed toward 

 the truncate apex, the surface of the segment perfectly flat and even 

 throughout, except a very feeble swelling at the tip of the ligula. 



O. fuscipennis Mann.— Bull. Mosc, 1843, II, p. 233, 



Black, the elytra rufescent ; legs pale brown ; surface highly pol- 

 ished, the punctures strong but rather sparse, closer and feebly sub- 

 confluent on the elytra. The head in the male is large, about as 

 wide as the prothorax, with a large deep apical concavity, the 

 middle of the frontal edge broadly sinuate, the sinuation limited 

 by rather prominent angular projections ; eyes rather small, at 

 nearly twice their length from the neck, the tempora evenly, 

 strongly arcuate from the eyes to the neck ; antennae a little longer 

 than the head, the outer joints strongly transverse. Prothorax not 

 twice as wide as long, deeply trisulcate, also longitudinally, ob- 

 liquely impressed toward the sides. Elytra a little wider and dis- 

 tinctly longer than the prothorax. Length 4.0 mm. ; width 1.2 mm. 

 Alaska to California. 



The sixth ventral is not modified, the seventh abruptly produced 

 in the middle in a gradually narrowed ligula, a little longer than 

 wide, subtruncate at apex, the surface of the segment thrown up 

 in the middle at the base of the ligula in a short transverse ridge 

 which is steep behind, gradually declivous anteriorly, the summit 

 of the ridge scarcely one-half wider than the apex of the ligula, 

 with its lateral limits very acute, each bearing a stiff seta ; surface 

 of the ligula perfectly flat throughout. The transverse groove of 

 the mentum attains the middle of the length, is parabolic in form 

 and interrupted in the middle. 



In connection with this species, I do not understand the reference 

 by Mr. Fauvel to laqueatus Marsh., as the sexual characters in my 

 representative of that species are altogether different, nor to lutei- 

 pennis Erichs., by Dr. Sharp in the "Biologia," as that species is 

 stated by Erichson to have the sixth ventral plate bituberculate at 

 apex. I think there can be no doubt that I have correctly identi- 

 fied Mannerheim's species, as there seems to be none other at all 

 like it found in Alaska. There is a large series in my cabinet. 

 Dr. LeConte confounded with this species one or more eastern 



