74 



ORTHOPTEROUS GROUP INSARAE 



length of the cephalic femur, slightly buUatc for somewhat more than the 

 proximal half, not nearly as much so as in /. iolteca, genicular lobes acute- 

 angulate produced and bearing a small sharp spine at apex. 



A male taken but a few miles from Mesilla, New Mexico, is here 

 chosen as the Allotype. 



Allotype. — d", Las Cruces, New Mexico.' September 27. (T. 

 D. A. Cockerell.) [U.S.N.M.] 



Dcscriptio7i of Allotype. — Very similar to female in general appearance 

 but somewhat smaller. The marginal field of the tegmina narrows more 

 abruptly distad from proximal third than in the female. Disto-dorsal seg- 

 ment of abdomen with median section showing a shallow depressed area, 

 in cross section the lateral margins are formed by distinct angles, these 

 margins are straight, convergent cephalad; supra-anal plate small, trigonal, 

 with lateral margins convex; cerci medium in length for the genus, not quite 

 as robust at base as in /. gracillima, gently tapering and slightly incurved 

 for two-thirds of their length, then of uniform diameter and more decidedly 

 incurved to apex which is suddenly flattened above and armed with a sharp 

 tooth, this tooth directed meso-dorsad at an angle of a little more than 

 ninety degrees to the distal portion of the cercus; subgenital plate short, 

 lateral margins convergent distad and produced in non-articulate styliform 

 appendages, cephalad from the base of these appendages extend slightly 

 divergent rounded elevations which become obsolete about the middle of 

 the plate, distal extremity of plate between the produced lateral margins 

 obtuse-angulate produced, the sides of this angulation slightly concave. 

 Measureynents {in millimeters) 



9 Las Cruces, New Mexico. 



Tijpe .. . 



9 Las Cruces, New Mexico. 



Paratype 



cf Mesilla, New M e x i c o 



Allotype 



9 San Antonio, Texas 



c? San Antonio, Texas 



cf Pueblo, Colorado 



9 Florence, Arizona 



c? Florence, Arizona 



17 



15.5 



15.2 



15.5 



16 



15.2 



18.3 



13.7 



3.7 



3.8 



3.5 



3.9 



4 



3.5 



3.8 



3.7 



60 O 



C £ 



26.1 



27.5 



23.8 

 27.9 

 24 

 21 



27.2 

 22.2 



&g 



3.1 



3.1 



2.7 



3 



2.8 



2.2 



2.7 



2.3 



29.6 



27.4 



31.7 



29 



24.3 



31.7 



23.7 





19.6 



19 



19.2 



21.5 



20.4 



17.6 



20 



17.7 



5,4 



5.7 



5.8 



The material before us shows that, although there is a certain 

 amount'of size variation in the present form, the proportions are 

 quite constant. 



