Vol. XXvi] ENTOMOLOGICAL NEWS. 159 



portion deeply blackish along subcosta, radius, media, lower cubitus 

 and upper anal vein; membrane with a great many minute black spots. 

 Venation black, excepting median fuscous portion of media; costal 

 area blackish at basal half, gradually becoming paler toward middle, 

 with about ten cross-veins; pterostigmatic region blackish, with one, 

 two, or rarely three, fuscous veinlets. Hind wing paler, nearly color- 

 less in anal area, but blackish in apical and hind marginal areas ; ptero.- 

 stigmatic region tinged with fuscous. Venation mostly blackish, but 

 radius, media and cubitus are yellowish at bases, and anal veins almost 

 entirely yellowish; a blackish streak along the upper cubitus and first 

 anal vein. 



Abdomen black, somewhat brownish on ventral side. In the male, 

 the ninth abdominal segment rather long, the tenth much shorter; 

 ventral appendages are nearly equilaterally triangular in outline, and 

 are very close together. 



Length of body, n mm.; of fore wing, II mm.; of hind wing, 10 mm. 

 Two specimens ( $ $ ), captured by Mr. T. Esaki, at Mino- 

 mo, near Osaka, in May, 1914, are in my collection. 



Sialis nikkoensis n. sp. (Text-fig. 3). 



Head blackish, a little narrower than prothorax, not narrowed pos- 

 teriorly, beset with blackish hairs on the sides; caudal half of head 

 with ferruginous streaks and spots ; maxillary and labial palpi fuscous ; 

 antenna black. 



Prothorax black, rather rounded on the anterior angles ; meso- and 

 metathorax nearly as large as prothorax, and totally blackish. 



Legs black, coxae and femora of all the legs covered with short 

 brownish hairs; the first tarsal joint as long as the next two following 

 joints together in each leg; claws very small, piceous. 



Fore wing slightly tinged with grayish ; marginal area somewhat 

 brownish ; basal portion deeply variegated with piceous black, espe- 

 cially deeply along veins ; pterostigma rather piceous. Venation black, 

 basal portion of upper branch of media pale; 11-14 cross-veins in discal 

 area ; two very weak cross-veins in pterostigma ; a single cross-vein 

 between subcosta and radius. Hind wing slightly tinged with grayish 

 throughout; pterostigma and apical area of the wing more or less 

 suffused with brownish; venation mostly blackish or piceous; nar- 

 rowly piceous along upper cubitus; 6-8 cross-veins in costal area. 



Abdomen fuscous gray; the ninth ventral segment very short; the 

 tenth segment short, yellowish and minutely spotted with piceous. 

 Paired ventral appendages very large, nearly deltoid in shape when 

 seen from below. 



Length of body, $ 15, 9 17 mm.; of fore wing, $ 12, 5 14 mm.; 

 of hind wing, $ n, $ 13 mm. 



