198 



are in a single row toward the base ; a hinder black streak near the base. 

 Wings pellucid. 



Length of the body, 1.33 inches; expansion of elytra, 2.33 inches. 



Chontales, Nicaragua (Walker). 



I€HTH\DIO]¥, f$aii88. 



The body similar to that in the genus Opomala, except that the elytra 

 and wings are wanting, and the face is less oblique, Antennae 13-jointed, 

 triquetrous, slightly dilated. The fastigium of the head as in Opomala. 

 Eyes oval, in the male large and prominent. Face quadricarinate. Body 

 compressed, elongate, slender; prosternum tuberculate. Legs short. 



I. mexicantim, Sauss., Rev. et. Mag. ZooL, XI (1859), 390. 



Olivaceous, varied with scarlet; the lateral margins of the pronotum 

 striped with white. Body of the female carinated above. Fastigium of the 

 vertex sub-carinate above, the apical foveola furnished internally with two 

 minute arcuate carinse. The pronotum of the male granulose. Genital 

 apparatus large. The posterior femora with the upper carina cristate near 

 the base; shorter than the abdomen. 



9 Length, 1.1 inches. 3 Length, 0.5 inch. 



Mexico calida (Saussure). 



PEGASIDIOHf, Sauss. 



Body slender, compressed, elongate. Head slightly deflexed. Antennae 

 broad, ensiform ; eyes prominent, elongate-ovatg ; vertex in front of the eyes 

 shghtly prominent, foveolate, somewhat deflexed, truncate. Facial carinas 

 elevated, not obsolete below. Pronotum but slightly carinate, truncate in 

 front. Prosternum armed with a cylindrical spine. Posterior legs slender, 

 very long ; spines on the inner side of the tibiae largest. Elytra narrow and 

 quite long. 



P. volitnns, Sauss., Rev. et. Mag. Zool., XIII (1861), 319. 



Head narrow; vertex short; face sub-deflexed, sub-rugose, strongly 

 quadricarinate ; intermediate carinas sub-parallel; costa above the ocellus not 

 excavated, wth large punctures. Pronotum compressed, with large punc- 

 tures througliout. sub-scabrous, scarcely carinated; anterior angle of the 



