ZOOLOGY INSECTS. 



Female. Vertex nearly horizontal, ; sides angularly expanding in front 

 of the eyes ; flat frontal costa prominent, sides parallel, sulcate from the - 

 ocellus downward, above the ocellus somewhat gibbous and punctured; 

 lateral carinae very prominent, parallel. Pronotum slightly expanding pos- 

 teriorly, coarsely and reticulately punctured ; median carina distinct, severed 

 by the three transverse impressions. Elytra and wings passing the abdomen. 

 Cerci very short, broad at the base, narrowed and rounded at the apex. 

 Posterior femora much enlarged at the base ; posterior tibiae considerably 

 enlarged at the apex. Prosternal spine robust, cylindrical, and nearly 

 straight. Pectus punctured. Abdomen of the main somewhat elongated ; 

 cerci very broad and flat, very slightly and obtusely notched at the apex, 

 which is bent upward and over the last segment ; subanal plate elongate, 

 turned upward, with a distinct square notch at the apex. 



Color. Dark olive-green. Ocelli bright transparent-umber; eyes 

 brown; cheeks yellowish, with a dark-green stripe extending downward 

 from the eyes. The pronotum has some pale spots on the sides, and some- 

 times the posterior lobe is tinged with brown. Elytra uniform green, some- 

 what transparent at the apex, and in some specimens faintly tinged with 

 brown. Wings hyaline; nerves and nervules dark-brown. Posterior 

 femora greenish above and below ; pinnae of the disk alternately white and 

 green, the white occupying the flat interspaces; inner face greenish-yellow. 

 Posterior tibiae bright- vermilion, the under surface being striped with yel- 

 low; spines yellow at the base, tipped with black. Venter and pectus dark- 

 green, sometimes varied with dark-brown. 



Dimensions. ? . Length, 2 to 2.25 inches ; elytra, 1.7 to 2 inches ; pos- 

 terior femora, 1.25 inches; posterior tibise, 1.2 inches. <* . Length, 1.6 to 

 1.75 inches. 



Several specimens of this fine, large species are in the collection, hav- 

 ing been obtained in Southeastern Nevada and Arizona. In some respects, 

 it is closely allied to A. obscurum, Burm., but is evidently quite distinct, as it 

 wants the stripe on the pronotum and black dots on the hind femora. It is 

 one of the largest species known to the orthopteral fauna of the United 

 States. This, with the other new and subtropical species found in the col- 

 lection, shows clearly that the southern portion of the area visited by the 



