272 CALIFORNIA ACADEMY OP SCIENCES [Proc. 4tii Ser. 



hind cox.ne, in scmivittata usually reaching on to the second ventral seg- 

 ment ; both species having the basal segment longer than the huccul?e. 

 Carinate margins of the pronotum regularly but feebly arcuated; in scmi- 

 vittiita straight or feebly sinuated at tlie middle. Upper surface smoother 

 with more regular and shallower punctures tlian in the allied species. 

 Genital segment of the male short as in sciiik'ittatii, but with its apical 

 margin roundedly excavated, its basal angles scarcely notclied. Claspers 

 with the ventral angle produced outwardly in an acute rounded hook which 

 almost conceals the rounded apex wlien viewed from below. 



Color pale yellowish testaceous, marked with areas of black punctures as 

 follows : a band on either margin of head before the eye superiorly and a 

 broader one infcriorly; a broad vitta down either side of the pale median 

 line, expanded so as to cover most of posterior disk of vertex, and four 

 well defineil rays on anterior half of pronotum. Basal half of scutcllum 

 polished black, crossed by tliree conspicuous pale calloused vitt;c. Beneath 

 with a fuscous or black cloud on side of pro- and meta-plcurne, and some 

 faint clouds on mesopIcur.T. Venter pale, with indications of lateral vittc^e 

 in the female, the male claspers lincate with black. Punctures on pale 

 portions of upper surface more or less infuscated. Mem])ranc uniformly 

 whitish in male, faintly fuliginous in female. Legs pale, immaculate except 

 for a darkening on tips of tarsi. Hairy vestiturc long, soft and pale as in 

 semivittcita. 



Described ffoni one male and two female examples taken in 

 San Francisco,. September 16, 1906, by Dr. Edwin C. Van 

 Dyke, after whom the species is named. So far as known to 

 me, this is the most clearly marked of all our species of Tricho- 

 pcpla. It may become more siifftised nnder other conditions. 



Holotype (No. 383), male, allotype (No. 384), female, and 

 paratype, in collection of the California Academy of Sciences. 



2. Trichopepla californica, new species 



Aspect of atricomis but with a shorter head and a maculated 

 connexivum. Length 63^ to 8 mm. 



Head distinctly shorter than its width across the eyes; broadly rounded 

 or truncated at apex, the sides parallel or nearly so for a space before the 

 ante-ocular smus. Third antennal segment not longer than second. Sides 

 of pronotmn almost rectilinear for a space at the middilc. moderately ex- 

 panded as m scwirUtata. Upper surface deeply punctured with black, the 

 ray-hke markmgs much obscured. Male genital segment trisinuately ex- 

 cavated, with its lateral angles strongly notched. Claspers oibliquely pro- 

 duced at apex as in sonkntfata, with their ventral angle produced" in an 

 acute, incurved hook as in vandykci. Rostrum short, scarcely exceeding the 

 intermediate coxae. 



Color as in scmivittata but with the ray-like markings more obscured by 

 large black punctures. The carinate pronotal margins seem always to be 

 pale and usually the median line of the pronotum and the three calloused 

 vittcTC of the scutcllum are conspicuous. Beneath the sternum is black and 

 there is a black lateral vitta on the pleura; and sides of the venter, the latter 

 placed halfway to median line. Male with disk of venter mostly black 

 Legs testaceous-brown or more or less infuscated. Antennc-e nearly black 

 connexivum about equally alternated with pale and black. Membrane quite 

 deeply infuscated. 



