20 G. H. HORN, M. T>. 



I>eNerlptionN of New Nperics of (Jnited NIates 

 COL.EOPTEKA. 



BY GEO. H. HORN, M. D. 



'I'his short contribution to Coleopterology was begun with the in- 

 tention of making known the new species brought by Mr. (x. K. 

 Crotch, belonging to the families to which the author had more 

 especially given attention. There being many new species in these 

 families from other parts of the country, this opportunity has been 

 made use of to add descriptions of these, as well as to make known some 

 .synonyms, and to present synoptic tables of several genera, in order 

 that the species may be more readily recognized. 



The attention of collectors in various parts of the country is called 

 to the species of Corphyra. The number occurring in California 

 alone is nearly equal to that of the entire region east of the Rocky 

 Mountains, and this fact gives rise to the suspicion that the species of 

 the latter region have not been properly collected and examined, 

 owing to their great superficial resemblance. 



The collections of Mr. Crotch show that, although very much has 

 been done in the development of the Coleopterous fauna of the Pacific 

 region, much remains to be done, especially in the smaller species, 

 uud to these the attention of collectors is particularly requested. 



CYCHRUS, Fab. 



C mimus, n. sp. — Black. Head smooth, transversely moderately convex, 

 clypeus with slight triangular impression at middle. Thorax cordate, not 

 longer than wide, sides arcuate in front, sinuate posteriorly, hind angles rect- 

 angular, surface sub-opaque, median line finely impressed, basal transverse 

 impression deeper, margin finely reflexed. Elytra oval, slightly more nar- 

 rowed posteriorly, convex, finely striate, striae with coarse, moderately deep 

 but not close punctures. Body beneath smooth, shining, reflexed portion of 

 elytra sparsely punctate. Length .56 — .68 inch; 14 — 17 mm. 



The males of this species have the anterior tarsi with three joints 

 dilated and pubescent beneath, and in the group thus characterized it 

 ii> allied to xtriafus and ubliquus especially, differing from the former 

 by its broader thorax and more deeply punctured elytral striae: from 

 tlie latter by the sides of thorax not being oblique. The latter species 

 (oh/iquux) has not the triangular impression at middle of clypeal mar- 

 gin and has the middle portion of the head more convex. With the 

 exception of the tarsal character of the male, this species cannot in 

 description be distinguished from pitnctatus, the only noticeable super- 

 livial difference being that punctatm has the striae much less and the 



