136 



other species a cross vein is présent between the posterior brandi 

 of cubitus and the first anal vein a little before tlie anal vein runs 

 into the margin. The présence or absence of thèse cross veins is 

 of good spécifie value. 



In some species subcosta runs into costa in the same distance 

 from the base as the furcation of the radial sector and the média 

 takes place, but in the greater part of species the subcosta rims 

 into the costa far outer. 



With regard to the genus Haplodictyus of Navas (^Meinorias 

 de la Real Acadeviia de Ciencias y Artes de Harceloua, vol. VI, 

 igoS, p. 413), I am sure that the main character (subtriangular 

 pterostigma), tipon which Navas has founded the genus, can not 



FiG. I. — liittacjis iichiJosus ç^ . l'ure and hind wing. M = Media; 

 G = Cubitus; A = Anal veins. 



hold good. The shape of the pterostigma in the Bittacid-wing 

 mainly dépends on the number of cross veins from the hind 

 border of the pterostigma to the anterior brandi of the radial 

 sector, and the distance between thèse veins. 



Most frequently there are t\vo cross veins, and the pterostigma 

 gets a subquadrangular or rectangular shape, but in the genus 

 Haplodictyus there onlv was to be one cross vein, and the shape 

 of the pterostigma accordinglv was to be subtriangular. I hâve 

 looked at a species from the Muséum of Paris, determined bv 

 Prof. Navas himself as Haplodictyus chevalieri , in which 



