THE DECTICIN^ OF NORTH AMERICA— CA UDELL. 399 



one-half the length of the pronotum. Subgenital plate apically notched 

 in both sexes, the side angles rounded in the female, in the male ter- 

 minating in somewhat slender styles. Last abdominal segment of the 

 male apically deflexed and roundly concave, similar in the female; 

 supraanal plate of l)oth sexes triangular, often difiicidtly seen but in 

 some specimens fairly prominent, often, in the male, with a central 

 pit extending nearly through the plate; cerci simple in both sexes, 

 quite uniformly tapering in the female, in the male with the apex 

 attenuate and bent inv. ards in the form of a hard, naked, black tooth. 

 (Figs. 83 and 86.) Ovipositor straight, not as long as the posterior 

 femora and abruptly pointed at the apex. 



Type. — Clinopleura melanopleiira Scudder. 



The members of this genus are natives of the middle Pacilic States, 

 all the known species being recorded from California or Utah. They 

 probably iidiatjit open fields, as Professor Morse has taken C. nielano- 

 pleiira in some numbers traveling about in grassy fields some distance 

 from woods. 



We have three species, one apparently undescribed. They may be 

 separated liy the following table: 



KEY TO THE .SPECIES OF CLINOPLEURA. 



A. Size larger, pronotuiii 6 mm. or more in length. 

 B. Cerci of the male with the apical black naked portion one-third, or more, as 

 long as the main body (tig. 83); pleura of both sexes with a light margin 

 behind and below, generally contrasted strongly with the rest of the surface, 

 which is black on the posterior portion and sometimes all over, 



melanopleura, p. 399 



B'. Cerci of the males with the black apical portion about one-fourth as long as 



the main body (fig. 86); pleura of both sexes with the colors usually but 



little contrasted Jia vomarginata , p. 401 



A''. Size smaller, pronotum 5.5 mm. or less in length; cerci of the male with the 

 apical black portion about one-fourth as long as the main body (fig. 86), 



ininiila, p. 402 

 CLINOPLEURA MELANOPLEURA Scudder. 



Steiroxys melanopleura Scudder, Ann. Kept. Chief Eng. , 1876, p. 500; Ann. Kept. 



U. S. Geol. Surv. West 100 Merid., 1876, p. 280. 

 Clinopleura mehmopleura Scudder, Can. Ent., XXVI., 1894, pp. 182, 183; Cat, 



Orth. IT. S., 1900, p. 79; Can. Ent., XXXIL, 1900, p. 332.— Woodworth, 



Bull, No. 142, Calif. Exp. Station, 1902, p. 15.— Kirby, Syn. Cat. Orth., II. 



1906, p. 194. 



Description. — Head broader than the anterior portion of the pro- 

 notum, into which it is very slightly inserted; vertex prominent, one- 

 half as broad as the interocular space, convex, not at all sulcate; eyes 

 ovate, of mediuu] size, not prominent; basal segment of the antenna 

 scarcely more than one-fourth as large as the vertex as viewed f i-om 

 in front. Pronotum as described under the genus. Elytra of both 

 sexes elongate, reticulated with conspicuous coarse veins. Legs \'ery 

 long, the posterior femora over three times as long as the pronotum 



