June, 1907.] Fall : North Ajnierican Cerambycid^. 83 



Eudistenia costipennis, new species. 



Subparallel, dorsum of elytra moderately flattened, pubescence short, recumbent, 

 moderately dense, ochreo-cinereous, elytra with three strongly angulate narrow black- 

 ish brown fasciae, the subapical one less distinctly defined. Head and prothorax finely 

 punctulato-rugose, the latter with an anterior transverse series of four feebly defined 

 tubercles, two discal the others lateral, and with a better marked but obtuse posterior 

 lateral tubercle, behind which the thorax is cylindrically constricted. Elytra a little 

 wider than the thorax, humeri rectangular and narrowly rounded, each with two 

 entire costas and a short basal inner one, the suture also a little elevated, surface 

 sculpture apparently like that of the head and thorax but more completely concealed 

 by the pubescence except for numerous larger nude punctures irregularly scattered 

 over the surface. Beneath finely punctate and cinereous pubescent. Length 

 17-23 mm. 



Southern California. , 



Five examples taken by Dr. Fenyes and the writer near the summit 

 of the Sierra Madre mountains above Pasadena, and one example from 

 mountains near Claremont (Baker). One specimen was beaten from 

 live oak, in which the insect probably breeds. 



This species bears a somewhat striking superficial resemblance in 

 size and markings to Distenia undata. 



Aside from the disparity in length of antenna there is apparently 

 little sexual difference. The fifth ventral is subequal in length to the 

 fourth and rounded at apex in both sexes, but more broadly so in the 

 male. 



Leptostytus yuccivorus, new species. 



Piceous, clothed rather densely throughout with short, appressed, cinereous 

 pubescence mingled on the elytra with very short erect pale hairs which are incon- 

 spicuous except in profile. Antennae subequal in length to the body, only slightly 

 longer in the male. Prothorax transverse, obtusely tuberculate at sides, the apex of ■ 

 the tubercle just behind the middle ; disk with an elongate median callosity in pos- 

 terior half and two rounded anterior ones, all feebly elevated and nearly smooth ; 

 disk otherwise uniformly moderately closely but not coarsely punctate ; pubescence 

 uniformly cinereous except for two apical and two basal spots in the form of a square ; 

 flanks sparsely punctate, nearly smooth at middle. Elytra nearly twice as long as 

 wide, about one half wider than the prothorax and nearly five times as long, disk 

 entirely devoid of tubercles or tufts of hair but with three smooth obtuse and slightly 

 elevated longitudinal lines which vary a little in distinctness ; pubescence cinereous 

 with more or less evident blackish vitt^e toward the side and apex. The raised lines 

 are frequently a little paler than the rest of the surface, the pubescence taking on in 

 consequence an ochreous tint which alternates with the darker vittss ; punctuation 

 dense and rather coarse at base, finer apically ; apices not at all truncate. Beneath 

 minutely densely punctulate and uniformly cinereous pubescent ; tibije feebly annu- 

 late, intercoxal process of prosternum narrower than the width of the coxal cavity. 

 Length 13 mm. 



