CERAMBYCID/E 203 



body, the third joint barely longer than the first, much longer than the 

 fourth and much shorter than the fifth as well as all the following; pro- 

 thorax distinctly elongate, strongly constricted near the apex, less strongly 

 near the base and angularly prominent at the middle of the sides, the base 

 much wider than the apex, bisinuate; surface strongly convex, deeply 

 impressed along the middle between the constrictions, finely and closely 

 punctate; scutellum densely pubescent, fully as long as wide, acutely 

 ogival; elytra at base nearly twice as wide as the prothorax, about four 

 times as long, feebly tapering, broadly rounding at apex to the rounded 

 sutural angles, the surface perfectly even, coarsely, closely punctured 

 basally, much more finely and feebly posteriorly; legs moderate, slender, 

 the basal joint of the hind tarsi nearly as long as the remainder. Length 

 (cf) i?-5 mm.; width 4.0 mm. California (Mt. Diablo). 



Differs from nevadica in its relatively wider and more strongly 

 punctate elytra, in having the lateral prominences of the prothorax 

 apparently more angulate, the apex much narrower than the base 

 and in the very large eyes. The last two features are of course to a 

 considerable degree subject to sexual modification, but it is probable 

 that the eyes are also notably large in the female ; the original descrip- 

 tion does not state whether the antennal joints in the female type 

 of nevadica are black at apex, but this feature in the male of oculata 

 may also be sexual in nature. The prothorax being much wider 

 at base than at apex, together with the rather different zoological 

 habitat, would seem to indicate, at any rate, that oculata is not 

 exactly the same as nevadica. 



Centrodera tenera n. sp. Small and very slender, parallel, uniform 

 dark red-brown in color, the antennae obscure testaceous, having the 

 apical two-thirds of joints five to eleven black; pubescence gray, de- 

 cumbent, uniform, rather short and only moderately dense throughout; 

 head very finely, closely punctulate, the median stria distinct; eyes large, 

 very coarsely faceted and separated by two-thirds of their own width; 

 antennse very slender, fully as long as the body, the fifth joint as long as 

 two to four combined, fourth two-thirds as long as the second; prothorax 

 evidently elongate and narrower at apex than at base, strongly bicon- 

 stricted, barely at all impressed along the middle, the median lateral 

 prominences strong but obtuse; punctures fine and dense, with a smooth 

 median line toward base; elytra three times as long as the head and 

 prothorax, two-thirds wider than the latter, parallel, rapidly obtusely 

 rounded at apex, finely, very feebly, sparsely and somewhat unevenly 

 punctate, producing the appearance of two or three vague longitudinal 

 lines of denser pubescence; legs slender, the basal joint of the hind tarsi 

 almost as long as the entire remainder. Length 10.5 mm. ; width 2.3 mm. 

 California (San Diego). 



The single type is probably a male and was sent to me among 



