244 NORTH AMERICAN OEDIPODINAE (ORTHOPTERA; ACRIDIDAE) 



lateral outline, due to the eye prominence and globosity; greatest depth of the 

 eye subequal to that of the infra-ocular sulcus. Antennae slightly longer 

 than caudal femora, slender, apex acute, proximal joints (beyond two basal 

 ones) appreciably depressed but not expanded. 



Pronotum short, subsellate, weakly strangulate. Disk of pronotum with 

 greatest (caudal) width but slightly less than greatest length of same; cephalic 

 margin of disk very faintly angulate; caudal margin of same subrectangulate, 

 the margin cingulate and very faintly sinuate on lateral portions: metazona 

 one-third again as long as the prozonal (prozona s. s. and mesozona) section: 

 median carina on restricted prozona distinct and arcuate but not high; on meso- 

 zonal section, which is faintly shorter, distinctly lower, partly obliterated and 

 marked by a median point or knob; on metazona the carina is distinct, contin- 

 uous, though weak, becoming more elevated caudad: transverse mesozonal 

 elevation more evident than that portion of median carina, crudely resembling 

 a figure eight, the caudal section of the margining carina the higher: lateral 

 carinae represented on prozona solely by several detached points, on metazona 

 by prominent but rounded shoulders : surface of metazonal disk with rugulosi- 

 ties scattered and irregularly transverse in disposition; principal transverse 

 sulcus deeply impressed. Lateral lobes of pronotum deeper than long, great- 

 est depth caudad; ventral margin distinctly arcuato-sinuate cephalad, straight 

 caudad; caudal margin broadly but shallowly concave from the disk to near 

 the ventral margin, where the ventro-caudal section is obliquely truncate; 

 surface of metazona of lobes obscurely cribroso-punctulate. 



Tegmina surpassing the apex of the abdomen by slightly more than the 

 combined length of the head and pronotum, narrow, the greatest width con- 

 tained six times in the length : costal margin with a broad and very low proximal 

 lobation, in distal fifth broadly arcuate to the distal margin, which is completely 

 rounded; sutural margin with a weak concavity distad, corresponding in a 

 lesser degree to the arcuation of the costal margm: texture of the proximal 

 half of the tegmina opaque, gradually becoming more translucent and with 

 sparser areolation distad, but nowhere hyaline: mtercalary vein indicated, 

 proximad nearer the ulnar vein, distad intermediate between the ulnar and 

 median veins; axillary vein free. Wings relatively narrow, the greatest 

 width contained twice in the length; apex of anterior field narrowh' rounded, 

 axillary field with margin broadly and obliquely arcuate-lobate. 



Interspace between the mesosternal lobes strongly transverse, the lobes 

 with their caudal and medio-caudal margin obliquely arcuate; interspace 

 between the metasternal lobes appreciably less than that between the meso- 

 sternal lobes, transverse. 



Cephalic and median limbs moderately slender. Caudal femora slightly 

 more than half as long as the tegmina, of medium rolnistness, the greatest 

 depth contained about three and one-third times in the greatest length of the 

 same; dorsal carina but little lamellate; external pagina with pattern relatively 

 regular: caudal tibiae appreciably shorter than the femora, armed on the 

 external margin with nine to ten spines, on internal margin with eleven to 

 twelve spines: caudal tarsi quite short, tlio metatarsus faintly shorter than 

 the remaining joints combined. 



