108 ^ CHARLES W. LENG. 



ington and Vancouver. Trinity Mountains of Trinity County, Cal. 

 (3000 feet). June to August. 



The distinguishing features of this species are less deeply wrinkled 

 thorax, smooth at middle and the more unequal punctures of the 

 elytra. The disk and apical margin of the thorax are nearly smooth 

 and not wrinkled. Covering a wide range of terrritory this species 

 {)resents many variations which have not received names. 



O. ainbigiius Schaupp, 1883, Bull. Br. Ent. Soc, vi, p. 121. 

 Length 16 mm. —.64 inch. 



Habitat. — Mount Shasta district, California ; probably Upper Soda 

 Springs, Siskiyou County (3000-4000 feet). 



As many readers may not have the Bulletin in which the descrip- 

 tion of this species occurs, I copy here Schaupp's words : " This 

 species resembles Lecontel Horn and Audouini Reiche ; it belongs to 

 my second group, the lateral margin of the thorax attaining the 

 basal margin ; from Lecontei it differs by the shape of the elytra, 

 agreeing therein with that of Audouini, by the bisinuate labrum, by 

 the much deeper frontal impressions, by the smoother thorax, with 

 hind angles more prominent, by the elytra more irregularly con- 

 fusedly punctured, and smoother near the middle ; from a large 

 specimen of Audouini it differs by latei"al margin of the thorax 

 united to the basal, by much sniootlier and less confluently punc 

 tured elytra and by the markedly stouter anteunce." 



One specimen, now in the collection of Charles Fuchs, is tlie only 

 representative. I owe an opportunity of examining this specimen to 

 the kindness of Mr. Fuchs and add to the description : 



Head wrinkled in front and between the eyes, wrinkles becoming obsolete at 

 the back of the head ; impressions oblique and broad ; labrum bisinuate, the 

 median lobe arcuately moderately advanced; anteunse more than half as long 

 as the body, rather stout but not more stout than in lievis, third and fourth 

 joints feebly constricted ; prothorax rounded broadly behind the apex and con- 

 verging arcuately to the base; the side margin attaining the basal margin ; the 

 surface is feebly wrinkled at the sides, more plainly at the apex and across the 

 base ; the central portion is, however, broadly smooth, the wrinkles entirely 

 effaced ; elytra elliptical, broadest at middle, strongly punctate throughout, punc- 

 tures partly confluent at apex. 



This species seems to me very close to Audouini, differing mainly 

 in the stout antennae by which it leads towards lodvis and other Sierra 

 Nevada forms, but especially towards Iwvis on account of its smoother 

 scul[)ture. 



