322 NEW TROPICAL AMERICAN ORTHOPTERA 



abdomen, in the greater interspace between the eyes, in the pro- 

 nounced depression and expansion of the caudal tibiae of the 

 male, in the more elongate and slender median and caudal tarsi, 

 in the caudal metatarsi of the male being subequal in length to 

 the remainder of the tarsus, instead of distinctly shorter as in 

 mexicana, in the supra-anal plate of the male being proportion- 

 ately broader, in the subgenital plate of the male being trans- 

 verse with the distal margin broadly truncate, instead of trigonal 

 with the apex narrow and V-emarginate as in mexicana, and in 

 the apices of the cerci of the female surpassing the supra-anal 

 plate, instead of subequal to the same as in mexicana. 



The expansion of the caudal tibiae of the male recalls E. tibialis 

 Hebard,^ from Hispaniola, but in the present species the expan- 

 sion is more regular and the dorsal surface bears a deep longitu- 

 dinal groove, instead of a shorter ovate depression as in tibialis, in 

 which species this expansion is equally marked in the female. 

 From tibialis, however, the present species is quite distinct, the 

 size being much less, the abdominal form different, the form of 

 the supra-anal plate of the male and details of the head not as in 

 tibialis. 



Type.- — cf ; Pacayas, Costa Rica. Elevation, 1430 meters. 

 April, 1906. (P. Biolley; no. 39.) [Academy of Natural Sciences 

 of Philadelphia, Type no. 5351.) 



_ Size medium: form elliptical, depressed: surface polished. 



Head with the occiput regularly arcuate transversely; interspace between 

 the eyes very broad, equal to the length of the head from the occiput to the 

 clypeal suture, the interspace between the ocellar spots distinctly less than that 

 between the eyes; eyes reversed reniform, subpyriform in basal outline, this 

 rectangulate at the dorso-cephalic angle ; antennae subequal to the body length. 



Pronotum of the form usual in the genus ; cephahc margin subtruncate in the 

 greater portion of the supra-occipital region, caudal margin arcuato-truncate 

 mesad, subtruncate laterad; lateral and cephahc margins narrowly cingulate. 

 Mesonotum and metanotum of the type usual in the genus. Tegmina not 

 surpassing the caudal margin of the mesonotum, lateral, their length almost 

 twice their greatest width; external margin shghtly arcuate, weakly cingulate, 

 apex rectangulate, internal and distal margin regularly arcuate. Wings absent. 



Abdomen very short ovate, more deplanate than the thoracic segments, 

 disto-dorsal abdominal segments with distinct but not strongly pronounced 

 caudad projections of the cauda langles. Supra-anal plate distinctly transverse, 

 the greatest length contained nearly two and one-haK times in the proximal 



1 Entom. News, xxvii, p. 264, pi. xiv, fig. 1 and text fig., (1916). 



