OCHETOTETTIX. 9 



Group TETTIGLE. 



OCHETOTETTIX, gen. nov. 



Related to and resembling Neotettiw, but differing from tbat genus in the wider furcation of the facial 

 costa, which approaches that of the Cladonotae ; in the presence of supernumerary carinae between the 

 humeral angles and the mid-carina; and in having the humero-apical carinae joined to the lateral carinae ; 

 leaving no scapular area. 



Key to Species. 



Lateral lobes of pronotum with the posterior sinus very shallow barretti, Hane. 



Lateral lobes of pronotum with the posterior sinus of normal size volans, sp. n. 



1. Ochetotettix barretti, Hanc. 



Neotettiw barretti, Hancock, Ent. News, x. p. 277 (Dec. 1899) \ 



Vertex very broad, twice the width of one of the eyes, and projecting in advance of them, its front margin 

 convex, with a prominent median tooth, the mid-carina, whose apex is nearly half the length of one of 

 the eyes in advance of their front margin ; shallowly excavate above on each side of the mid-carina ; the 

 crown elevated, with indications of mammillae close to and nearly opposite the middle of the eyes. Eyes 

 of moderate size, but little protuberant. Eace in profile convex, with a slight emargination at the lower 

 end of the rami of the facial costa. Antennae very short, inserted just below the level of the eyes, 

 separated by a space three to four times greater than the distance between them and the eyes. Facial 

 costa forking high up, opposite the upper part of the eyes ; the rami of moderate height, smoothly sinuous, 

 convergent below, forming a deep, concave, broadly lanceolate scutellum, acutely pointed above. Pronotum 

 moderately tectiform, truncate before, cuneate behind, reaching the apex of the hind femora, the humeral 

 angles very obtuse, sides of hind process nearly straight ; surface granular-tuberculate ; mid- and lateral 

 carinae prominent, sharp, the former arched in front of the shoulders, straight or slightly undulate behind. 

 Supernumerary carinulae short, distinct, placed just in front of the humeral angles, parallel to the lateral 

 carinae, midway between them and the mid-carina. Lateral lobes with the posterior sinus very shallow, 

 somewhat as in Nomotettix. Elytra narrowly lanceolate, rounded at the apex. Wings absent. Anterior 

 and middle femora short and stout, of the female 2| x 1, of the male almost clypeate, barely 2x1, the 

 lower margins lobate ; hind femora stout, genicular and femoral lobes conspicuous. 



Total length, <J 7, $ 6-8-8: pronotum, <$ 6, $ 6-2-7; post, fern., <$ 4, $ 4-4*5; antennae, <5 1'5, $ 2millim. 



Eab. Mexico, Chilpancingo in Guerrero, Atoyac in Vera Cruz (H. H. Smith). 

 A male from Atoyac and three females from Chilpancingo. 



2. Ochetotettix volans, sp. n. 



A larger species, with fully developed wings and pro- 

 notum, readily distinguished from its congener by 

 having the posterior sinus of the lateral lobes of the 

 pronotum of normal size; the surface is more 

 smoothly granulate; the shoulders broader, with 

 more pronounced humeral angles ; the elytra larger, 

 long-elliptical, with rounded apex. The femora are 

 of the same general character, but less stout, especi- 

 ally the intermediate pair of the male. 



Total length, <S 11-11-5, $ 12-12-8: pronotum, 6 10-5, $ 11-11-7; post, fern., 6 4-5-4-8, $ 5-5-6; 

 antennae, 6 2, $ 2-2-5 ; pronotum beyond post. fern. 3-3-5 millim. 



Hal. Mexico, Dos Arroyos, Chilpancingo, Venta de Zopilote, Xucumanatlan, and 

 Omilteme, all in Guerrero, 1000 to 8000 feet (//. H. Smith). 



Two males and five females. 

 biol. CENTR.-AMER., Orthopt., Vol. IT., August 1900. Cc 



