88 PROCEEDINGS OF THE AMERICAN ACADEMY. 



The only species known are confined to the Pacific mast region of 

 North America, though some occur east of the Sierra Nevadas. Some 

 of the Bpeciea originally referred to it do not belong here, bo thai there 

 are inaccuracies in my brief remarks in the Canadian Entomologist, loe. 

 cit., |>. 181. O. (xqualii may be regarded as the type. 



Table of iin. Species oi Cacopteris. 



u ] . Male with no spines on inner margin of fore tibiae above, and rarely with any 

 black spot at outer apex of tegmina. Female also with no spines on inner margin 

 of fore tibiae above, or rarely with a Bingle one. 

 b l . Pronotum relatively Bhort, being but little longer than broad; apical denta- 

 tions of Bupraanal plate <>f male blunt, at least as broad a* long. 

 c 1 . Tegmina of male fusco-testaceous, unicolorous ; Bupraanal plate of male 



broadly and roundly emarginate at apex inermis. 



.-. Tegmina of male light testaceous, with a distincl Mack apical spot ; 

 supraanal plate of male deeply and angularly emarginate apically. 



Juscopunctata. 

 //-. Pronotum relatively long, being about half as long again as broad; apical 

 dentations of supraanal plate of male acuminate, at least twice as 1 < » 1 1 »_c as 

 broad. 



C 1 . Lateral lobes of pronotum with a Blight inferior flange anteriorly ; fore 

 femora as long as pronotum: cerci of male prolonged apically beyond the 

 inner median tooth to a bluntly acuminate spine reaching well beyond the 



subgenital plate sinuata. 



c-. Lateral lobes of pronotum with a pronounced inferior flange anteriorly; 

 fore femora shorter than pronotum ; cerci of male with a short blunt conical 



extension beyond the inner median tooth, not reaching the tip of the bud- 



genital plate ephippiata, 



a 2 . Male with one or two, generally two, spines cm inner margin of fore tibial 

 above, and a distinct black spot at outer apex of tegmina.* Female generally 

 spined on fore tibia' as much as male, rarely without spines. 



/.'. Ovipositor almost or quite as long as hind femora, which are little if any 

 longer than the body. 



C 1 . Ovipositor much longer than hind femora ; apical dentations of supraanal 

 plate of male triangular, somewhat brief, separated by a V-shaped cleft ; 

 apical hook of cerci comparatively Btout, apically bent .... ntvadensis. 

 c-. Ovipositor about as long as hind femora; apical dentations <>f Bupraanal 

 plate of male Blender, acuminate, separated by a U shaped sinus; apical 

 hook of cerci comparatively slender, feebly incurved at tip .... eequalis. 

 /--. Ovipositor only three fourths as long as hind femora, which are much longer 

 than the body jemorata. 



* The male of C.femorata is unknown, but as the female has two or three Bpil 

 on tin' inner margin of the fore tibia- above, it evidently belongs in tin- category. 



