796 PROCEEDINGS OF THE ACADEMY OF [Nov., 



QQ — Cerci exceeding the subgenital operciile in length, very distinctly 

 bent arcuate proximad and compressed in the distal half, 



B. jugalis Rehn. 



Stal's B. dorsuariri' and Scudder's B. exigua^ are known from the 

 males, while B. remiformis Rehn^ is based on the female sex. The 

 latter has the median segment two-thirds the length of the metanotum 

 itself, which fact would associate it with jaliscensis, inco7npta and 

 jugalis. As the female of jugalis is known it is certainly not that 

 species, while the other two species are very much larger in the male 

 sex than the female type of remiformis. Accordingly I think it a good 

 species of which the male is unknown. 



LIBETHRA StM. 

 1875. Libethra Stal, Recensio Orthopterorum, III, pp. 20, 74. 



Type. — L. nisseri Stal. 

 Libethra auritus n. sp. 



Type: ? ; San Jose, Costa Rica. Altitude, 1,160 meters. August, 

 1904. [No. 22.] (P. Biolley.) [A. N. S. Phila.] 



Allied to L. ignavus Westwood, but differing in the ear-like cephalic 

 appendages, the reduction of the lobes on the median and caudal 

 limbs, the absence of especially pronounced lobes on the second ab- 

 dominal segment and the presence of such on the fifth segment, and the 

 shorter caudal limbs. 



Size rather small; form moderately robust; surface closely supplied 

 with tubercles of several sizes, the larger size arranged in parallel longi- 

 tudinal rows. Head slightly longer than broad, supplied between and 

 slightly caudad of the eyes with a pair of erect subrotundate foliaceous 

 lobes, about twice as high as the eye is deep, margins of the lobes irregu- 

 larly crenulate; eyes short ovate; antennae about equal to the head 

 and thorax in length, proximal joint large, considerably depressed. 

 Pronotum slightly longer than broad. Mesonotum about twice as 

 long as the head and pronotum together, a longitudinal median carina 

 present but subobsolete cephalad, the large tubercles irregularly 

 paired laterad of the median carina with a regularly placed pair caudad. 

 Metanotum with the median segment about two-thirds the length of 

 the mesonotum wdth the median carina distinct through the entire 

 length; median segment subquadrate, slightly narrowed cephalad, 



' Recensio Orthopterorum, III, p. 79. [Chiriqui.] 



^ Proc. Boston Soc. Nat. Hist., XVII, p. 278. [Eastern slope of Peruvian 

 Andes.] 



* Proc. Acad. Nat. Sci. Phila., 1904, p. 58. [Piedras Negras, Costa Rica.] 



