of the Subfamily iEschnina. 419 



basal costal nervules before the first thickened nervule in one 

 anterior wing. 



Heliceschna ugandica, sp. n. 



General characters as in H. fuliginosa, and apparently not 

 differing in anal structure. Colour (excepting the face, 

 which is dingy) black, paler beneath, the abdomen showing 

 traces of paler markings (more evident in the female). Legs 

 wholly reddish ]jiceous, or the tarsi sometimes blackish. 



^ . Wings hyaline, not tinged ; pterostigma black 

 (3 millim.), surmounting nearly 4 cellules; neuration less 

 dense, black ; two rows of cellules between the branches of 

 the sector, 4 cellules on the margin ; 4 cellules between the 

 subnodal and the interposed sector at the widest part ; a 

 single row between the sectors of the triangle for the whole 

 length ; 22 ante- and 13 postnodals in the anterior and 15 

 and 13 in the posterior wings ; 5 cellules in the principal 

 triangle, 2 in the inner ; 5 supra-trigonals ; 3 or 4 nervules 

 in the basal area; anal triangle 3-celled. 



$ . Wings as in male, but slightly tinged with yellow at 

 the extreme base; pterostigma brownish yellow (2£ millim.) ; 

 23 ante- and 15 postnodals in the anterior and 17 ante- and 

 postnodals in the posterior ; two rows of cellules between the 

 sectors of the triangle for a short distance on the margin in 

 the anterior only ; (other neural details mainly as in the 

 male). 



Length of abdomen, $ {cum append.) 49 millim., $ [ap- 

 pend, excl.) 42 millim. ; length of posterior wing, J 42, 

 $ 43 millim., greatest breadth, $ 14, ? 14^ millim. 



Hah. Uganda, East Central Africa (E. P. De?wit, received 

 from M. Kene" Oberthur), one male and one female, slightly 

 immature. 



The pair above noticed appear to be specifically distinct by 

 the very small pterostigma, less dense neuration *, and appre- 

 ciably broader wings (especially the posterior) when compared 

 with an example of H.juliginosa of practically the same size; 

 also in the nearly wholly reddish legs. In the right poste- 

 rior wing of the female the first postnodal cellule is divided 

 longitudinally, but exceptionally and not as a continuation 

 of the subcosta. 



JEschna erythromelas, sp. n. 



? . Face elongate, olive- green, labium and palpi brownish ; 

 crest of top of the front dusky posteriorly, ciliated with 



* Compare the details given for H. ftdiyinosa by Dr. Karscb, he. cit. 



