AMERICAN ORTHOPTERA. 21 



Size medium. Head with the vertex developed into a conoid process of con- 

 siderable length; eyes globose, much exserted; antenna? filiform, rather long; 

 region of the frontal costa considerably swollen. Pronotum sub-sericeous; an- 

 terior margin sub-truncate, the posterior arcuate; lateral lobes deeper than long, 

 the anterior and posterior margins straight, lower margin arcuate, anterior angle 

 apparent. Tegmina rather elongate; apex diagonally trimmed; tympanum 

 rather small, the stridulatihg vein not more apparent than the other veins of the 

 same area. Wings extending to the apex of the tegmina. Anterior and median 

 femora slender, unarmed except for the genicular spines, the median consider- 

 ably longer than the anterior, both deeply sulcate inferiorly ; tibia slender, quad- 

 rate in section, anterior pair with several spines on the lower margins, the pos- 

 terior with many spines on the lower margins, the proximal portion unarmed, 

 the distal extremity with the spines closely placed. Posterior femora slender, 

 sulcate below, the distal portion of the lower margins with a number of small 

 spines, the internal margin with fewer spines, genicular lobes produced; tibiae 

 considerably longer than the femora, quadrate, margins entirely spined, in the 

 proximal section sparser than in the distal. Subgenital plate elongate, bicarinate, 

 the apex truncate ; styles short and stout. Cerci lunate, the apex expanded, ter- 

 minal portion produced, supplemented by a sub-terminal tooth, the resulting 

 diastema being considerably emarginate. 



General color pea green, tinged on the head and pronotum with an ashy tint ; 

 a yellow line extending from the extremity of the vertex to the border of the 

 pronotum ; eyes reddish brown. 

 Measurements: 



Length of body 17. mm. 



Length of pronotum ..... 5.5 mm. 



Length of tegmina ...... 31.5 mm. 



Length of bind femora ..... 19.5 mm. 



Pycnopalpa morl uii'olia n. sp. 



Type : male ; Teocelo, Vera Cruz, Mexico. September. Collected 

 by Otis W. Barrett. 



Allied to P. bicordata Serville, but differing iu the more dentate 

 and non-lamellate lower margin of the anterior femora, the anterior 

 border of the pronotum being more deeply emarginate, the posterior 

 border more shallowly emarginate, and the wings also elongate. 



Size small. Head with the vertex developed into an elongate, sulcate process 

 bearing two lateral spines and a basal denticle, the extremity of the vertex being 

 narrowly truncate; eyes ovate, strongly exserted ; face below the eyes bearing a 

 pair of wide shallow sulcations extending to the base of the clypeus; region 

 between the antennal bases with a blunt, wart-like process; antenna? filiform 

 Pronotum narrow, sub-concave above; the anterior margin broadly, triangularly 

 emarginate, posterior bi-arcuate, the ceutral emargination being slight ; central 



* The genus Pycnopalpa Serviile (Orthopteres, p. 408, 1839), antedates Plagioptera 

 Stal (Eecens. Orthopt.. ii, p. 16, 1874), and was based on a single species — Locusta 

 bicordata Serville. 



TRANS. AM. ENT. SOC, XXIX. NOV KM HER, 1902. 



