AQUATIC INSECTS IN NEW YOEK STATE 44:9> 



blacker; Bj of fore wings with rarely more than two simple or ' 

 forked branches; the proximal cross veins of Ri-R, and R,-M 

 are opposite. Length to tip of wings 10 to 15 mm; alar expanse 

 22 to 26 mm. Males are the smaller. ■ 



S. concava Banks was said to differ in being always con- 

 cave between the eyes. This, however, is not a constant character- 

 as shown by an examination of hundreds of specimens. Four- 

 teen specimens in the Harvard collection under this label are 

 apparently males ofS. infumata. 



A species of very wide distribution: arctic America, Quebec,. 

 Nova Scotia, throughout New England and New York, New Jer- 

 sey, Maryland, Washington D. C, Washington N. C, Ohio, De- 

 troit Mich., Galena and Galesburg 111., Saskatchewan region, ia 

 Minnesota at Minneapolis and St Cloud, in California at Lake- 

 Tahoe, Placer co., San Geronimo, San Celito. 



2 S. fuliginosa Pictet 



1836 Sialis fuligiiiosa Bictet, Ann. Sci. Nat. pl.3, fig.6 



1839 Sialis fuliginosa Burmeister, Handb. Ent. 2:947 



1S56 Sialis fuliginosa Brauer, Verli. Zool. Bot. Ges. p. 397 



1857 Sialis fuliginosa Brauer & Lo-w, Neur. Aust. p.52 



ISes Sialis fuliginosa McLachlan, Ent. Mo. Mag. 2:107, flg.l; and" 



1866, 3:95 

 1868 Sialis fuliginosa McLachlan, Ent. Soe. Lond. Trans. 152:8, 



fig.2 

 This European species, not formerly reported in America, dif- 

 fers from S. infumata in several points: larger, the alar ex- 

 panse of the female being 38mm and the three brown spots be- 

 tween the antennae relatively much larger; much more densely 

 pilose throughout, even slightly so on the hind wings; compound 

 eyes ferruginous with several black spots or areas ;' the proximal 

 cross vein Bj-R^ is distinctly distad of the proximal cross vein 

 Rg-M, the latter generally opposite the first fork of media. In S. 

 infumata the yellow infusion around the eyes is usually quite- 

 distinct, while in S. fuliginosa it is much less so. Fore 

 wings never -with less than three accessory veins arising from 

 B3; these are either simple or forked. 



Six specimens collected by Morrison 1878, Reno Nev., one- 

 from Morris county, Cal., two from Mendocino Cal., and two^ 



