442 PROCEEDINGS OF THE ACADEMY OF [June, 



AIDEMONA Brunner.8 

 Aidemona azteca (Saussure). 



Monte Redondo, Costa Rica. January, 1903. (C. F. Underwood.) 

 One male, one nymph. [A. N. S. Phila.] 



Guatel, Costa Rica. April and September, 1902. (C. F. Under- 

 wood.) Three males, eighteen females. [A. N. S. Phila.] 



This series appears to be rather uniform in size and of quite uniform 

 coloration. The males differ somewhat from central Mexican (Jalisco, 

 San Luis Potosi and ]\Iicht)acan) specimens in the slenderer cerci, and 

 both sexes in the shorter tegmina and wings, which but slightly exceed 

 the caudal femora in the male, and are of proportionate length in the 

 female. Specimens from the State of Vera Cruz are closer related to the 

 Costa Rican type than to the more northern form. As the material 

 of the male sex from Costa Rica is rather limited, I have refrained from 

 describing the form, but a more extensive series will in all probabilit}^ 

 verify the observation made regarding the cerci. 



DICHROPLUS Stll. 

 1873. Dichroplus Stal, Recensio Orthopterorum, I, p. 78. 



Included arrogans, patruelis, cliens and lemniscatus Stal, of which the 

 first may be considered the type. 

 Dichroplus morosus n. sp. 



Type: 9 ; Monte Redondo, Costa Rica. January, 1903. (C, F. 

 Underwood.) [A. N. S. Phila.] 



Allied to D. punctulatus and conspersus, but differing in the more 

 obtuse-angulate caudal margin of the pronotum, the more uniformly 

 sulcate frontal costa, as w'ell as the duller coloration. 



Size small; form as usual in the genus. Plead with the occiput 

 very slightly rounded and ascending; interocular space slightly 

 more than half the width of the eye ; fastigium strongly de- 

 clivent, not excavated, margins slightly elevated, hardly separated 

 from the frontal costa; frontal costa subequal, slightly expanding ven- 

 trad, moderately sulcate to and for a short distance below the ocellus; 

 lateral ocelli situated close to the eye at the dorsal margin of the an- 

 tennal fossae, median ocellus situated between the antenna? and slightly 

 ventrad ; eyes subreniform, slightly longer than the infra-ocular portion 

 of the gense, the greatest width contained about once and a half in 

 the length; antennae slightly depressed, apically damaged. Pronotum 

 depressed dorsad, no median carina except a slight ridge on the meta- 



* This generic name should be credited to Brimner (Ann. Mus. Civ. Stor. 

 Nat. Genova, XXXIII, p. 14.5) instead of Scudder. It was based on Stal's 

 "Divisio tertia" of the genus Pezotetti.v, of which the only species not eliminated 

 — azteca — is the type. 



