184 GEO. H. HORN, M. D. 



CYCHRUS Fab. 



Head moderately elongate, neck subglobular, genae in front of eyes 

 dilated and concealing the base of the maxillae, not or extremely 

 feebly incised, gula between the eyes deeply transversely impressed. 

 Eyes convex, moderately prominent. Antennae very little longer than 

 half the body, the basal joint stout not much longer than the third. 

 Tarsi similar in the two sexes, simple. 



The sexes are distinguished by the dilated palpi of the male and 

 the more ventricose elytra of the female. The legs are moderately 

 stout and less elongate than in Scaphinotus or Brennus, but less 

 stout than in Spheeroderus. The apices of the elytra are rather 

 suddenly declivous. 



To this genus belong the species of Europe, and three from our 

 own fauna distinguished as follows : 



Front flattened, sides of thorax sinuate posteriorly, elytra with series of 

 tubercles tuberculatum. 



Front transversely convex, sides of thorax oblique, elytra rugulose with tracea 

 of tubercles at declivity Heiuphillii. 



Front carinate, thorax angulate at middle, base slightly prolonged, hind angles 

 rectangular, elytra finely punctato-striate augulatus. 



C. tuberculatus Harris, Bost. Journ. ii, p. 2U0 ; Lee. Pacific R. R. Reports, 

 1857, App. i, pi. 1, fig. 6. — Black, opaque. Head moderately elongate, front 

 flattened rugose, occiput coarsely punctured. Thorax cordate, as wide as long, 

 base and apex equal to two-thirds the length, sides in front arcuate, posteriorly 

 sinuate, hind angles rectangular, apical and basal impressions moderately deep, 

 median line feebly impressed, surface opaque and coarsely punctato-rugose. 

 Elytra oval, apex feebly narrowed, disc slightly flattened, surface opaque and 

 with three series of larger smooth tubercles, the largest tubercle being at the 

 end of the second row at the declivity, between these larger tubercles are rows 

 of smaller ones and in the intervals between them all are small granules; 

 inflexed portion of elytra coarsely punctate. Body beneath black and shining, 

 punctures coarse, sparse and subobsolete. Length .80 — .90 inch; 20 — 2.3 mm. 

 This species occurs in Vancouver, and at the present time rare. 



C Heinpliillii n. sp. — Black, shining. Head moderately elongate, front 

 transversely convex, surface rather coarsely punctured, confluently near the 

 sides, less densely in front and posteriorly. Thorax slightly wider than long, 

 subcordate, base and apex very nearly equal to the length, sides in front 

 arcuate, posteriorly obliquely convergent, hind angles obtuse, apical impres- 

 sions feeble, the basal deeper, median line moderately impressed, disc slightly 

 convex, coarsely and deeply punctured and intricately rugose. Elytra oblong 

 oval, wider behind the middle, apex rather abruptly declivous, disc convex, 

 surface shining and rugulose, the sculpture being formed of elongate tubercles 

 variously couHuent becoming distinctly granular towards the sides and apex; 

 inflexed portion of elytra coarsely punctured. Body beneath black, shining, 

 sides of prothorax with large but distant punctures, abdomen sparsely punctu- 

 late at the sides. Length .60 inch; 15 mm. 



