358 NEW TROPICAL AMERICAN ORTHOPTERA 



the narrower fastigium of the vertex, in the more compressed 

 pronotum which also has narrower lateral lobes, in the narrower 

 stridulating field of the male tegmina, in the shorter stridulating 

 vein, in the more robust caudal femora and tibiae, and in the 

 more compressed subgenital plate of the male. One of the 

 striking features of the species is the black patellar spot dorso- 

 proximad on the caudal tibiae. 



Type. — cf; Puntarenas, Costa Rica. November 2, 1915. 

 (Anastasio Alfaro; at electric light.) [Academy of Natural 

 Sciences of Philadelphia, Tj^pe no. 5356.] 



Size large: form compressed and as usual in the genus: surface smooth, 

 weakly glabrous, tegmina with a moderate sheen. 



Head with its greatest width across eyes contained one and one-half times in 

 the greatest depth of the head; occiput gently arcuate declivent cephalad; fas- 

 tigium somewhat broader than the proximal antennal joint, faintly narrowed 

 mesad at the cephalic border of the paired ocelli, non-sulcate dorsad, meeting 

 the fastigium of the face in a straight suture; median ocellus rather small: 

 palpi xery slender; third joint slightly longer than the fourth, the latter faintly 

 sigmoid and narrowed at base; fifth joint elongate, longer than the third and 

 fourth together, weakly and regularly enlarging distad: eyes but little promi- 

 nent when seen from the dorsum, in basal outline circular-ovate, faintly 

 pointed ventro-cephalad, in depth very slightly greater than that of the infra- 

 ocular sulcus: antennae surpassing the apices of the tegmina. 



Pronotum with the dorsum very faintly arcuate longitudinally, greatest 

 (caudal) width of pronotal disk contained one and one-third times in the 

 greatest length of the same; cephalic margin of disk emargina to-truncate, 

 caudal margin of disk broadly and strongly arcuate with a suspicion of angula- 

 tion mesad, lateral portions of disk broadly rounding into the lateral lobes, 

 more angulate, though appreciably rounded, caudad; disk with indications of a 

 subobsolete median carina, mesad there is indicated a reversed bipinnate, lightly 

 impressed, figure, the caudal outline of which is narrowly acute-angulate : 

 lateral lobes deep, narrow^, the greatest width contained one and one-half times 

 in the greatest depth, narrowing appreciably caudad; cephalic margin faintly 

 concave, ventro-cephalic angle rounded obtuse, ventral margin very short, 

 oblique, ventro-caudal angle broadly arcuate, caudal margin slightly oblique 

 arcuate ventrad, slightly flattened dorsad, humeral sinus acute with the angle 

 narrowly rounded. Tegmina surpassing the apex of the abdomen by nearly 

 the length of the body, of the type usually found in the genus, but narrower, the 

 greatest width {which is at the proximal third) contained three and three- 

 fifths in the greatest length of the tegmen; costal margin regularly arcuate in the 

 proximal haK, straight in distal half, rounding to the apex, which is narrow but 

 rounded; sutural margin largely straight: marginal field broad in proximal 

 three-fifths of the tegmen, its greatest wndth equal to two-fifths of the greatest 

 tegminal width : costal margin with the callose nodes of the proximal half dis- 

 tinct, rather regularly placed and decreasing in size and prominence distad: 



