AMERICAN COLEOPTERA. 315 



This group consists of two species, botli introduced from P^urope. 



Thorax behind lateral tooth sinuate rufimanus. 



Thorax behind lateral tooth not sinuate pisi. 



B. rufimanus, Sch. Curcul. i.. p. 58.— Oblong oval, black, sub-opaque. 

 Head black, densely punctulate, sparsely clothed with ochreous pubescence. 

 Antennae black, four basal joints rufous. Thorax broader than long, sides 

 moderately rounded in front of tooth, sinuate behind it, tooth in front of middle, 

 acute and moderately prominent; surface opaque densely punctured and with 

 a whitish triangular space in front of scutellum. Scutellum sub-quadrate' 

 emarginate at apex sparsely clothed with ciuereous hairs. Elytra slightlv 

 longer than broad, feebly convex, sides moderately rounded, surface more 

 shining than the thorax, moderately striate, intervals flat, densely punctulate. 

 and with the basal margin, base of suture and two irregular transverse bands 

 of whitish hairs. Pygidium clothed with cinereous hairs and with two oblong 

 black spots. Body beneath black, densely punctulate and clothed with cinere- 

 ous hairs. Anterior legs rufous, except their tarsi, tip of tibia and base of 

 femur which are piceous. Middle and hind legs black. Hind femur with a 

 not very distinct tooth near the apex on the outer side. Hind tibia sub-trunc- 

 ate, inner spine not prolonged. LeDgth .14 — .16 inch; 3.5— 4 mm. 



This species was sent me by Mr. C. V. Riley, of St. Louis, as hav- 

 ing been reared from pea-pods imported from Switzerland. The 

 European synonymy has been omitted as not pertinent to the present 

 essay. It is closely allied to the following species, but a comparison 

 of the two descriptions will suffice to distinguish them. 



B. pisi, Linn. Syst, Nat. i.,ii., p. 604; Schon. Curcul. i., p. 57. — This species 

 is larger than the preceding and more depressed. The thorax is broader, and 

 broader at base, and the tooth more acute and longer. The three basal joints 

 of the antennse are rufous. Legs black, anterior tibiae and tarsi rufous. Hind 

 femur with an acute tooth on the outer margin. The surface of the body is 

 similarly sculptured, but the vestiture is different. The thorax is clothed with 

 ochreous hairs with a whitish space opposite the scutellum. Elytra clothed 

 with yellowish, cinereous and whitish hairs, the latter forming an oblique band 

 behind the middle. Body beneath black, slightly shining and densely punc- 

 tulate, sparsely clothed with cinereous hairs. Pygidium cinereo-pubesceut 

 with two oval blackish spots. Length .20 inch; 5 mm. 



Abundant over nearly the entire globe, wherever peas are cultivated, 

 and is at times very destructive to that crop. 



Group IT. 

 In this group I have separated one species which does not in its 

 aspect appear to belong to any of these which follow, although from 

 the armature of the hind femur it might be included in Group VIII. 

 The hind femur is broader than is usual in our species and armed 

 with a tooth and three denticles; the the tooth is moderate, and the 



