Horn.] OTIOKHYXCHINI. 61 



Thorax coarsely granulate. 



Rostrum sulcate, elytra with rough sculpture rugifrOBS. 



Rostrum finely carinate, elytra feebly sculp- 

 tured maurus. 



Thorax smooth, finely punctured. 



Rostrum flat above, elytra nearly smooth monticola. 



O. sulcatus Fab. Syst. Ent. p. 155 ; Herbst, Kiifer, vi, p. 347, pi. 87, 

 fig. 5, 1 Sayi Boh. Sch. Gen. Cure, vii, p. 523. (European synonymy omit 

 ted). 



Form oblong, brown black, sub-opaque. Rostruni sulcate at middle, tip 

 emarginate and with a V shaped cailna ; surface sparsely and coarsely 

 punctured and sparsely hairy. Tliorax sub-cylindrical^ sides moderately 

 arcuate, widest in front of middle, not longer than wide, surface with 

 rounded tubercles rather closely placed, each bearing a short hair. Elytra 

 oblong oval, disc slightly flattened, humeri obtusely rounded, surface 

 broadly striate, stri* coarsely punctured, intervals feebly convex and witli 

 a row of shining rounded tubercles rather closely placed and with small 

 patches of short yellowish hair irregularly placed. Body beneath black, 

 shining and very sparsely hairy. Femora strongly clavate, deeply sinuate 

 near the tip and with a very small acute tooth. Length .34 inch ; 8.5 mm. 



This species has been so often described in easily accessible European 

 publications, that I consider it unnecessary to add to the above description, 

 this with the table being sufficient to enable it to be recognized by the 

 student of our fauna. 



Occurs in Massachusetts, Canada, Newfoundland and Nova Scotia. 



O. ligneus Oliv. Ent. v, 83, p. 378, pi. 31, fig. 473. 



Form oblong, color piceous, shining. Rostrum flat, emarginate at tip, 

 surfiice very coarsely and closely punctured, between the eyes a deep 

 puncture. Thorax nearly spherical, truncate at apex and base, surface 

 tuberculate, (at middle the tubercles become confluent in rows with deep 

 sulci between them), each tubercle punctured at summit and bearing a 

 short hair. Elytra oval, striate at the sides, striae obsolete on the disc and 

 with coarse punctures closely placed, intervals flat on the disc and feebly 

 muricate, at sides moderately convex and slightly tuberculate. Legs piceo- 

 rufous, femora clavate, sinuate near the tip and with a moderately strong 

 tooth bearing a denticle on its free edge. Length .20 inch ; 5 mm. 



This is the smallest species which has occurred with us, and may l)e 

 easily known by the femoral armature and the nearly spherical thorax with 

 its peculiar sculpture. 



Occurs in the New England States. 



O. rugifrons Gyll. Ins. Suec. iii, p. 319. 



This species resembles sulcatus, but is somewhat more robust and with 

 the elytra more broadly oval, and the humeri more oblique. The femora 

 are moderately sinuate near the tip and without tooth. The surface is 



