AQUATIC INSECTS IN NEW YORK STATE 449^ 



blacker; R3 of fore wings with rarely more than two simple or 

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

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

 22 to 26 mm. Males are the smaller. 



S, c o n c a V a 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 of S. i n f u m a t a . 



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, in 

 Minnesota at Minneapolis and St Gloud, in California at Lake 

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



2 S, fuliginosa Pictet 



1836 Sialis fuliginosa Pictet, Ann. Sci. Nat. pl.3, fig.G 



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



1856 Sialis fuliginosa Brauer, Verb. Zool. Bot. Ges. p.397 



1857 Sialis fuliginosa Brauer & Low, Neur. Aust. p.52 



1865 Sialis fuliginosa McLachlan, Ent. Mo. Mag. 2:10Y, fig.t; and ' 



1866. 3:95 

 1868 Sialis fuliginosa McLachlan, Ent. Soc. Lond. Trans. 1.52:8, 



fig.2 



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

 fers from S. i n f u m a t a 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 Ri-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 

 Rg; these are either simple or forked. 



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

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



