28 Bulletin of the Brooklyn Entomological Society Vol.X 



Corticotomus Sharp. Biolog. Centr, Am. Insecta, Col. II, part 

 I, page 390, Sept. 1891. 



C. cylindricus Lee. Nemosoma cylindricum Lee., Smith. 

 Mise. Coll., Vol. VI, p. 65 (1863-65). 



This speeies superficially resembles the preceding two, but can 

 be readily separated by the characters of the head. From C. 

 caviceps Fall, which it more closely resembles, it can be separated 

 by the form of the head and by the elytral striae being distinct to 

 the apex. It is apparently fairly well distributed in the eastern 

 states but scarce. 



C. californicus n. sp. Form narrow, elongated, convex, but 

 slightly shining, rufous, with antennae and legs lighter than the 

 body. Antennae extending backwards just beyond margin of 

 head, first joint moderate, joints 2-8 small and short, gradually 

 wider externally and subequal in length to club, club robust and 

 about twice as wide as eighth joint. Head elongate (excluding 

 mandibles), broader than long, just perceptibly convex at sides, 

 at eyes but slightly wider than thorax or elytra; eyes moderate 

 and not prominent and situated anterior to middle. Front tri- 

 angularly flattened and with shallow fovea at apex above and 

 transversely impressed at junction with clypeus, surface moder- 

 ately finely and sparsely punctured. Prothorax about yi longer 

 than head, as wide posteriorly as base of elytra, thence gradually 

 divergent forwards where just perceptibly broader than base of 

 head, base broadly arcuate, apex truncate, disc finely and sparsely 

 punctate anteriorly, punctures but vaguely indicated posteriorly, 

 side margin fine. Elytra as wide at base as base of thorax, with 

 straight sides which are just perceptibly divergent to near apex 

 where broadly rounded, about three times as long as broad and 

 considerably longer than head and thorax together, with striae 

 faintly impressed and punctured for basal three fourths with 

 double series in close apposition, of faint, elongate, punctures, 

 apical declivity without distinct impression. Head beneath and 

 prosternum with a few fine punctures, metasternum and abdomen 

 practically smooth. 



Length, 3 mm., breadth, .7 mm. 



Type in my own collection. Paratype sent to U. S. Nat. Mus. 

 Type locality, Carrville, Trinity County, Cal. 



