CALIFOliXlA ACADEMY OF ^CIK.XCFS 



CAIODERMA u. gcu. 



The species of this genus present a singularh' liomoge- 

 ueous a])pearauce, the}- being clistinguished by their very 

 narrow elongate form, small heads with parallel sides, quad- 

 rate prothorax and long narrow parallel elytra; the abdom- 

 inal sculpture is also a distinguishing feature, the transverse 

 wavy lines of minute sub-asperate punctures being peculiar 

 to them, although having a tendency to reappear in the 

 genus Metaxyodouta. 



1 — C. rUffOSUm n- sp. — Sleuder, nioderatelj'- convex; sides parallel; ccjlor 

 througliuut piceous; pubescence extremely sparse and scarcely noticeable 

 npon the head and prothorax, very fine, extremely dense and sericeous on the 

 elytra and abdomen, pale ochreous in color and very conspicuous; under 

 surface and legs piceous-browu, the latter slightly paler, tarsi pale brown; 

 antenu;T) fuscous throughout. Head short and robust, scarcely longer than 

 wide; sides parallel, very feebly arcuate; base transversely truncate, basal 

 angles distinctly rounded; surface feebly and evenly convex, finelj' and ex- 

 tremely densely punctate throughout, slightly more sparsely so between the 

 antennas; punctures round, shallow and sub-annular; eyes at much more 

 than their own lenglh from the basal angles, moderately prominent; antenna' 

 slender, nearly as long as the head and prothorax together, scarcely percep- 

 tibly incrassate; basal joint as long as the next two together, second very 

 slightly shorter and more robust than the third, tenth slightly longer than 

 wide; maxillary palpi piceous-black; labrum with four equal acute triangu- 

 lar teeth, sides broadly and roundly lobed. Prothorax about as long as and 

 slightly wider than the head; sides parallel and feebly arcuate; base strongly 

 arcuate; apex broadly and much less strongly so; apicd angles distinctly 

 rounded, basal very broadly so; apex with a very small feeble sinuation in 

 the middle; disk very slightly longer than wide, transversely, moderately 

 and evenly convex, very minutely, rather strongly and evenly rugulose; 

 ruguLc sinuous and interrupted; having a very narrow and imperfect median 

 line toward base. Eli/ira at base very slightly wider than the prouotum; 

 sides par illel a:ud feebly arcuate posteriorly; together broadly, triangularly 

 and feebly emargiuate behind; disk transversely and moderately convex, 

 one-third longer than wide, one-half longer than the prothorax, feebly im- 

 pressed along the suture, which is margined with a slightly elevated line, 

 extremely minutely, evenly and densely punctate; punctures asperate and 

 more sparse near the ajiices. Ahdomen scarcely perceptibly paler toward tip, 

 transversely strigate with fine wavy lines of extremely minute asperities. 

 Li'(js moderate; anterior tarsi feebly dilated, first joint of the posterior as 

 long as the next two together. Length 3.7-1.2 mm. 



