342 STUDIES IN THE ISCHNOPTERITES (oRTHOPTERa) 



the wings, distinctive male supra-anal plate and somewhat dif- 

 ferently formed male subgenital plate and styles.^ 



Type.— d"; Caparo, Trinidad. June, 1912. (S. M. Klages.) 

 [Acad. Nat. Sci. Phila., Type no. 5308.] 



DescripHon of Type. — Size very large for the genus; form moderately slender. 

 Head elongate, much as in morio but with interocular slightly narrower than 

 interocellar space. Pronotum with discal sulci strongly defined as in morio. 

 Tegmina and wings much as in that species, but with wing veins embrowned. 

 Dorsal surface of abdomen likewise in general similar, but with distal margin 

 of eighth segment very broadly and evenly concave. Supra-anal plate with a 

 meso-distal nearly circular portion, occupied by a soft integument which is 

 much less extensive than in morio, leaving large proximal and lateral chitinous 

 areas; lateral chitinous portions with distal area expanded and almost circular, 

 bearing distad a number of bristles. Cerci elongate with thirteen apparent 

 joints. Subgenital plate strongly asymmetrical, produced, with free margin 

 dextrad straight transverse to slightly beyond mesal point, there directed 

 caudad, forming slightly more than a right angle with angle rather sharply 

 rounded, there at the apex of this produced portion is situated a heavy style of 

 similar size and character to that found in morio except that it curves evenly 

 sinistrad, thence the free margin is oblique to its sinistral base, furnished 

 beneath the sinistral cercus with a small, slender, straight style of half the 

 length of the conspicuous style. 



Allotype. — 9 ; same data as the type. [Acad. Nat. Sci. Phila.] 

 Description of Allotype. — Similar to male except in the following features. 

 Size slightly larger; form broader, particularly in abdominal region. Portion 

 of dextral tegmen concealed when at rest, hyahne, but weakly embrowned, 

 with veins embrowned. Dorsal surface of abdomen not specialized. Supra- 

 anal plate triangularly produced with sides rather deeply angulato-concave 

 and apex broadly rounded; the distal portion less strongly chit'nous. Sub- 

 genital plate large and convex; free margin broadly convex, showing a broad 

 weak flattening mesad and at the cerci. 



M ensurements {in millimeters) 

 Caparo, Trinidad ^| ^| |§ || l| 



& x^ ^ ^ ^ ^ 



Type 19.8 4.8 6.5 21.9 5.5 



9 



Allotype 20.5 5.3 7.2 23.3 5.9 



Paratypes (5) ... 20 . 2-23 . S 5 . 1-5 .4 6 . 4-G . 9 22-23 .1 5.3-6.1 



Coloration. — General color of head, pronotum and ventral 

 surface of abdomen polished blackish brown. Liml)s and dorsal 



' The female of morio is unknown to us and we are consotiuontly unal)I(> to 

 make comparisons with that sex. 



