Bruner : South A merican Locusts. i 15 



pronotum prominent, straight. Wings largely hyaline 



except for the roseate disk. 



Cocylotellix Rehn. 



cc. Wings of male nol fenestrate in humeral held, the radial veins not 



incrassate. Lateral carinae parallel or gently divergent to the 



rear. 



d. Pronotum provided with a pair of supplemental carinae on the disk. 



Sinipta Stal 

 (/i/. Pronotum without the supplemental carinae on the disk. 



Leurocerus Bruner. 

 bb. Antennae filiform. Lateral carinae of pronotum parallel. 



Amblytropidia Stal. 



.1.1. Foveolae of the vertex visible from above; but sometimes very inconspicuous. 



Face generally less oblique than in the alternate category. 



b. Inner apical spurs of hind tibiae subequal in length. Antennae, at least of 



male, nearly or quite as long as the hind femora. 



c. Body robust, apterous or subapterous, somewhat similar in form to 



the representatives of Caleles Brunner. Vertex longitudinally 



carinate [Galapagos Islands] Closteridea Scudder. 



cc. Body provided with wings, of normal form. Vertex not longitudinally 

 carinate. [Not insular in distribution.] 

 d. Wings colored. Basal joints of antennae depressed. Tegmina 

 without a trace of an intercalary vein. 



j Fenestra Giglio-Tos. 

 I Dichroateltix Bruner. 

 dd. Wings hyaline or transparent. Basal joints of the antennae not 

 depressed. Tegmina provided with a more or less well de- 

 veloped intercalary vein. 

 e. Foveolae of the vertex very inconspicuous. Antennae 

 elongate. 

 /. Fastigium of the vertex provided with a prominent 

 median longitudinal carina. A polobamba gen. no v. 

 ff. Fastigium of the vertex without a prominent median 

 longitudinal carina. 

 g. Pronotum without lateral carinae or with carinae that 

 are very widely interrupted in the middle . 

 Insects moderately graceful in form. 

 /;. Valves of the ovipositor short and very blunt 



[Paraguay] Amblyscapheus Bruner. 



hh. Valves of the ovipositor normal in form 



[Peru] Compsacris Bolivar. 



gg. Pronotum provided with well developed lateral 

 carinae that are usually continuous. Insects 

 more robust in form. .Slaurorhcclus Giglio-Tos. 

 ee. Foveolae of the vertex distinct. Antennae shorter. 



/. Size of insects larger (d\ 17-18 mm., 9, 21-22 mm.); 

 form rather robust. 



