194: Journal of the Mitchell Society [May 



Head narrow ; vertex about twice as long as broad, strongly pro- 

 duced anteriorly; triangularly excavated on the posterior margin, 

 lateral margins strongly elevated and pustulate ; anterior margin 

 separated from the f rons by a distinct carina ; f rons narrow, about 

 four times as long as broad on the clypeal margin, the lateral margins 

 nearly parallel above, gradually widened to the border of the clypeus 

 below ; the lateral margins strongly elevated ; median carina wanting ; 

 clypeus strongly inflated broadly inserted into the frons, wider than 

 the frons ; lateral border faintly margined ; median carina distinct ; 

 antennae short ; antennal collar strongly elevated ; second segment of 

 the antennae about four times as long as the first ; eyes large, ventral 

 sinus broad and deep ; prothorax short, broadly notched posteriorly ; 

 the posterior borders strongly elevated ; median carina blunt ; inter- 

 mediate carina blunt ; lateral carina not as strongly elevated as the 

 ventral margin ; antennal chamber very deep. Mesonotum nearly as 

 long as broad, strongly inflated anteriorly, tricarinate; all the carinas 

 faint; wings long and narrow, nearly five times as long as broad; 

 radius separated from subcosta at about the middle of its length : 

 medius two branched, each of these branches forked at a short dis- 

 tance from the apex; cubitus deeply forked; forking nearly the same 

 level as the claval veins ; claval veins two, the posterior one coarsely 

 pustulate ; legs slender ; posterior tibia unarmed ; posterior tarsi 

 nearly half as long as the tibia. 



Euklastus New Genus. 



Fig. 339 

 Orthotype Euklastus harti n. sp. 



This genus ma}^ be recognized by the peculiar venation of the 

 wings, by the narrow frons and elongate antenna. 



Head narrow, the eyes large, vertex very small, deeply incised 

 posteriorly ; produced anteriorly and continued as the narrow rounded 

 frons ; frons very narrow produced ; clypeus broader slightly inflated, 

 antennie elongate, first joint very small, second joint flattened, elong- 

 ate; pronotum short, deeply notched posteriorly, the anterior margin 

 a little produced, median carina evident; mesonotum large, ecarinate; 

 fore wings long, subcosta and radius united to near the apex of the 

 wing; medius with four branches, clavus narrow, open, the common 

 stem of claval veins extending to first cubitus, hind wings small, costal 

 margin with an appendix, venation reduced ; legs slender, hind tibite 

 without spines. 



