AMERICAN COLEOPTERA. 159 



The variations of color are so numerous in this species as to have 

 caused the amount of synonymy above noted, to which European 

 additions might be made. In all well preserved specimens the abdo- 

 men is iridescent. 



The principal varieties are as follows : 



groenlandicus Zett. — Color piceous or even black, legs and antennae piceous. 

 fulgidus Fab. — Head and thorax black, elytra rufous or rufo-testaceous, 

 abdomen piceous. Legs piceous varying to ■pale.=iracundus Say. 

 ©rythrogaster Mann. — Similar io fulgidus but with abdomen also rufous. 



melanocephalus Mann, — Head black, thorax and elytra piceo-rufous, abdo- 

 men piceous. 



There may possibly be some doubt regarding this last synonym., 

 but immature specimens are before me which correspond very well 

 with Manuerheim's description. It is however stated that the front 

 at middle is not punctured, and this with the elytral punctuation fixes 

 quite certainly the synonymy. 



The prothoracic process is moderately long, and although corneous 

 is semi-transparent. 



This species is distributed over northern Europe and the north of 

 our own continent, as far south as middle California and northern 

 Georgia. 



I have seen a curious deformity of the antennae in a specimen of 

 this species. On the right side joints six and seven, eight and nine 

 in each case form one joint without indication of suture, and on the 

 left side joints six and seven are connate but a constriction marks the 

 point of union, while eight and nine are closely connate in a single 

 joint as on the right side. 



Q. siibliinbatus Makl. Bull. Mosc. 1853, iii, p. 190. — Head oval, shining, 

 smooth, a minute puncture over the base of the antennae, a larger at the margin 

 of the eye, one distant from the eye on the occiput, another posterior to the 

 eye, front without punctures. Labruin bilobed. Antennae nearly as long as 

 the head and thorax, gradually broader to the tip, last joint larger than the 

 preceding, obliquely truncate, color piceous or rufous. Eyes oval, longitudinal 

 not truncate in front. Thorax wider than long, narrower in front, sides moder- 

 ately base more strongly arcuate, surface smooth, shining with a dorsal series 

 of three punctures, no lateral series, marginal punctures distant and small. 

 Scutellum smooth. Elytra as wide as thorax, conjointly longer than wide, 

 surface with coarse, deep and moderately closely placed punctures, sparsely 

 pubescent. Abdomen sparsely finely punctate, sparsely pubescent. Body be- 

 neath very sparsely punctate, abdomen beneath as above. Femora very sparsely 

 punctate, tibiae finely spinulose. Length .20 — .24 inch; 5 — 6 mm. 



The sixth ventral of the male is rather deeply emarginate, and the 



anterior tarsi moderately dilated, and in the female feebly dilated. 



