234 . [October, 



Symtdia, gen. n. 



Head narrower than tliorax ; vertex triangular, small, face linear to near 

 apex, formed by the two contiguous carinae which diverge slightly near apex ; 

 no subantennal processes ; antennae small, globose ; clypeus longer than face, 

 feebly tricarinate, rostrum reaching to near the end of the abdomen. Pro- 

 notnm widely auuularlv euiarginate on hind margin, shoulder keels lar^^e, 

 lateral margin turned up and, together with the shoulder keels, forming an 

 antennal chamber; mesonotum tricarinate. Tegmen with the subcostal cell 

 long, cubitus bifurcate, both veins entering the hind margin, clavus narrowly 

 open, media with three sectors, the iirst sector with three branches and 

 appearing as if part of the cubitus. AVings slightly less than half the length 

 of the tegmina (l-2"2), two distinct cubital veins, anal area small, without 

 Teins, the margin striate, forming a "■ stridulating" area. 



This genus approaches the Zoraidinae in the structure of the wing, 

 but it cannot be placed among them, as the cubital veins are distinct 

 and the cubital and anal areas are not sufficiently reduced. The tegmen 

 is not unlike that of Mysidia. 



Type, S.flava Muir. 



S.Jlava, sp. n. 



o" . Light yellow, a small spot of brown in front of the eyes at the junc- 

 tion of the vertex and face. Tegmina white, hyaline, veins yellowish, with 

 some irregular light brown markings, six small marks in costal cell, an irregular 

 mark in the middle of the cubital area, an irregular broken band from the apex 

 of subcostal cell to apex of cubital veins, slight fuscous marks over the apical 

 portions of the median sectors ; wings hyaline, a small fuscous spot in the 

 middle, an irregular transverse mark near apex, and a small spot at apex. 

 Both tegmina and wings opaque with white, powdery, waxy secretion. 



Medio-ventral edge of py gofer forming a small triangular projection ; anal 

 segment large, narrow at base, widened to the middle and then slightly 

 narrowed to apex, which is angularly emarginate, anus at base ; genital styles 

 large, narrow at base, widest in middle, ventral edge entire, gradually pro- 

 duced to middle, then more abruptly reduced, dorsal edge with a semicircular 

 projection near the apex, apex bluntly pointed and slightly turned inward, a 

 keel runs from near the base to the apex near the dorsal margin. ^ 



Length 2 mm. ; tegmen 4-1 mm. 



2 . Genital styles exceedingly small ; anal segment very small, sunk into 

 the pregenital segment, ventral edge slightly angularly produced ; pregenital 

 plate large, the median third of the posterior margin produced into a sub- 

 lanceolate process with a wide base, the production concave along the middle, 

 the concavity extending to near the base of the pregenital plate. 



Length 2 mm.; tegmen 4*25 mm. 



Hah. Beitish Guia>a, Demerai-a Kiver. 

 Described from five males and five females. 



