AQUATIC INSECTS IN NEW YORK STATH# 452 
darker; R, only one branched; Sc-R, cross vein only one. 
Length to tip of wings 12 to 14 mm; alar expanse 24 to 26 mm. 
Reported from Georgia and Pennsylvania. One specimen in 
the Museum of Comparative Zoology. Hagen [1861] is my au- 
thority for placing the name given by Walker as synonymous: 
with the above. 
6 S. bifasciata Hagen 
1861 Sialis bifasciata Hagen, Synopsis Neur. N. Am. p.188 
General color ferruginous; head not narrowed posteriorly, 
color orange with two broad, black stripes, shining orange 
streaks and spots behind; antennae stout, black, pilose; protho- 
rax orange, anterior angles obtuse, sides with broad fuscous: 
somewhat shining stripe and flat points; femora yellowish with 
base fuscous; feet fuscous; wings pale fuscous, somewhat shin- 
ing, front ones obscure on costal margin, veins pale fuscous. 
Length to tip of wings 10 to 12 mm; alar expanse 17 to 20 mm. 
Cuba. 
7 S. chilensis McLachlan 
1870 Sialis chilensis McLachlan. Ent. Mo. Mag. 7:145 
Fusco-nigra, abdomen black; head reddish, an impressed med- 
ian longitudinal line reaching the hind margin, joining a sinuate 
‘line in front before the antennae, frontal part and at sides of 
median line suffused fuscous, a fuscous spot on each side below 
the eyes; labrum truncate in front, testaceous; eyes larger and 
much more prominent than in other species; thorax blackish 
fuscous, very narrow, clothed with a short pubescence; antennae 
and palpi black; legs and feet blackish fuscous, short pubescent; 
claws and beneath lobes of fourth tarsal joints testaceous; 
wings smoky, somewhat shining, membrane with short, black 
hairs, pale space in each wing below the juncture of R with Se; 
veins black, costal area narrow, slightly dilated, with about 
seven ©-Sc cross veins, R, with but one forked branch; front 
wings long and narrow, apex long elliptic; hind pair slightly 
~ broader. 
Chile. 
S. lutaria Linn. is the most common European member of 
the genus. There are seven specimens in the Hagen col- 
