144 NEW NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



restricted than, that of eurycercus. The material before us of 

 compressus is from Beeville, Cotulla, Sabinal, Uvalde and Del 

 Rio, Texas. 



Type. — cf ; Laguna del Gato, three miles west of Sam Fordyce, 

 Hidalgo County, Texas. Elevation 175 to 200 feet. August 6, 

 1912. (Rehn and Hebard.) [Hebard Collection, Type No. 218.] 



Size smaller than compressus, form appreciably less robust, this the more 

 pronounced in head, pronotum and caudal femora. Head and pronotum 

 agreeing in contour with that species, the caudal margin of the pronotum 

 similarly (normally) very feebly concave. Tegmina elliptical, (normally) 

 smaller than in compressus, extending almost to caudal margin of metanotum 

 (in series occasionally extending slightly beyond metanotum, as is normal for 

 compressus). Prosternal spine blunt conical. Supra-anal plate and minute, 

 linear, parallel furcula much as in compressus. Cerci distinctive, broad, 

 tapering moderately in proximal two-thirds, distal third three-fifths as broad 

 as base with margins parallel to transversely truncate apex, the dorsal angle 

 of which is more broadly rounded than the ventral angle (compare Plate VIII, 

 fig. 8 with fig. 9 of compressus). Pallium broad (twice as broad as in com- 

 pressus), projecting dorsad, twice as broad as high, the convex dorsal surface 

 forming nearly a semicircle with marginal convexity caudad. Subgenital plate 

 rectangulato-convex, truncate (sub-conical convex in compressus) . 



Allotype. — 9 ; same data as type. [Hebard Collection.] 

 Agrees with type in ambisexual characters, except the following. Size 

 decidedly larger, form decidedly more robust; but not showing anything like 

 the very great disparity between the sexes in these features found in compressus. 

 Median carina of pronotum more distinct and percurrent, the pronotum (as 

 in compressus) more inflated. Ovipositor valves as in compressus. 



Measurements (in millimeters) 5 



Type. 

 Paratypes. 



Length of 

 body 



17 



16-1^.7 



Length of 

 pronotum 



3.7 

 3.7-3.8 



Width of 

 pronotum 



3.3 

 3.1-3.4 



Exposed 

 length of 

 tegmen 



2.2 

 2.2-2.8 



Length of 

 caudal 

 femur 



9.6 ' 

 9-9.8 



Quitman Mountains, 

 Texas. 



13.2 



3.2 



2.8 



2.2 



8.2 



Del Rio, Texas. 



9 

 Allotype. 



18 



4.1 



3.8 



2.7 



10.3 



23 



5.2 



5 



3.2 



12.7 



Paratypes. 



21-24.5 



4.6-5.6 



4.5-5.4 



3.1-2.9 



11.7-12.7 



Marathon, Texas. 



27 



5.8 



5.7 



3.4 



13.4 



6 In the present paper the measurements are given for the largest and small- 

 est examples of both sexes in the series, where these are not represented in the 

 extremes given for the typical series. 



