196 NEUROPTERA. 
EPILASCHNA. 
Epieschna, Hagen, Proc. Bost. Soc. Nat. Hist. xviii. p. 86 (1875) *; Selys, Bull. Acad. Belg. (3) 
v. p. 729 (1883) ?; Kirby, Cat. Odon. p. 90 (1890) *; Karsch, Ent. Nachr. xvii. pp. 285, 290 
(1891) *; Williamson, Ent. News, xiv. pp. 5-7 (1903) ’. 
There is but one known species, Epiwschna debilis, Karsch, being apparently a 
Nasieschna, as first suggested by Messrs. Needham and Hart. 
1. Epi#schna heros, 
Aishna heros, Fabr. Ent. Syst., Suppl. p. 285 (1798) '. : 
4ischna heros, Rambur, Névr. p. 194 (1842)?; Hagen, Syn. Neur. N. Am. p. 128 (1861) °; 
Provancher, Nat. Canad. x. p. 130 (1878)‘; Aaron, Dragonflies vs. Mosquitoes, t. 1. fig. 2 
(entire insect, coloured) (1890) °. 
Epieschna heros, Kellicott, Canad. Ent. xxvi. p. 846 (1894)°; Needham, Bull. 47, N. Y. St. Mus. 
p- 468 (1901) (with bibliography) ; Howard, Insect Book, t. xli. fig. 7 (entire insect) (1901) °; 
Williamson, Ent. News, xiv. t. ii. fig. 3 (venation) (1908) ’. 
Abdomen (excl. apps.), ¢ 55-63, 9 57-62; apps., ¢ 7, 2 8-5-9; hind wing, ¢ 50-60, 2 58-63, costal edge 
of pterostigma, front wing, 4°5-5°5 mm. 
Hab. Norta America, Quebec* and Michigan ® to Florida? and Texas (A. W. S.: 
1 2 ).—MExico ?. 
LIBELLULID. 
Antenodals of the costal and subcostal series mostly continuous, the last antenodal 
on the hind wings continued to the median vein, no postnodals in the proximal end of 
the second (median) series; triangles of the front and hind wings dissimilar in shape 
(that of the front wing with its long axis at right angles to the length of the wing, that 
of the hind wing with its long axis parallel to the length of the wing), that of the hind 
wing much nearer to the arculus than is the case on the front wing. Lateral lobes of 
the labium of one joint. Head subglobose, eyes meeting on the top of the head 
(except in the South-American Diastatops). Abdomen with lateral carine. Females 
without genital valves (outer? gonapophyses of the ninth segment), except in Uracis 
and in Palewosynthemis of New Guinea. 
De Selys divided this group into two subfamilies, which he distinguished substantially 
as follows * :— 
Eyes posteriorly with a sinuous or graniform prolongation, venation of the anal 
margin different in the two sexes, almost always a bundle of hairs at the 
external [antero-distal] extremity of the first femora; males with auricles on 
the sides of the second abdominal segment; first tibiz bordered with an 
[inferior, distal] lamella, anal margin of the hind wings almost always 
* Bull, Acad. Belg. (2) xxxi. pp. 289, 240, 247 (1871). 
