MCNEILL REVISION OF THE TRUXALIN^ OF NORTH AMERICA. 27 1 



C Lateral foveoL-e about twice as long as broad. 



D.' Face but little oblique (male) or vertical (female). Scutellum of 

 the vertex pentagonal with the posterior side of the pentagon 

 missing. Median carina not distinct upon the summit of the 



head. Tegmina (female) scarcely exceeding the abdomen 



2. — Decussata, Scud. 



D.2 Face even in the female strongl)- oblique. Scutellum of the ver- 

 tex elliptical with the posterior side of the ellipse open. Median 

 carina distinct upon the summit of the head and accompanied by 

 two supplementary carinje. Tegmina far surpassing the abdo- 

 men in both sexes 3. — Texana, Scud. 



C.^ Lateral foveolK scarcely longer than broad.. 4— Delicatula, Scud. 



B.2 General color creamy white with a greenish tinge. Antennal 

 sulci black 5 . — Eiirotm, Bruner. 



I. Stirapleura ornata, Scud. 



Dociostaicrus ornatus, Scud., 1876. U. S. Geol. Surv. W. 100 

 Mer., App. JJ, 507. 



Dociostauriis ornatus, Bruner, 1S83. 3rd Rept. Y . S. Ent. Com., 58. 



Hab. Northern New Mexico (Scudder). 



This species has been reported but once. I have examined the 

 type which is in Mr. Scudder's collection. The species to which it 

 belongs undoubtedly belongs to this genus and it is distinct as shown 

 by the sub equal inner ap cal spurs of the hind tibiae, by the thick and 

 somewhat clavate antennas and by the structure of the vertex. 



2. Stirapleura decussata. Scud. Figs. 30a, 30b. 



Stirapleura decussata, Scud., 1876. U. S. Geol. Surv. VV. 100 

 Mer., App. J J, 510. 



Stirapleura decussata, Scud., 1880. 2nd Rept. U. S. Ent. Com., 

 App. II, 26. 



Stirapleura decussata, Bruner, 1883. 3rd Rept. U. S. Ent. Com., 57. 



Psolol'ssa coloradensis, Thos., 1876. Proc. Dav. Acad. Nat. Sci., 

 I, 252, pi. xxxvi, fig. 34. 



Hab. Colorado (Scudder, Thomas) ; Colorado, Wyoming, New 

 Mexico, Arizona, Montana (U. S. Nat. Mus.). 



[ have not seen the type of .S. decussata, but it undoubtedly belongs 

 to the genus which I have called Stirapleura and it agrees well in size 

 and other particulars with .S". coloradensis. It is very possible that 



