AQUATIC INSECTS IX NEW YORK STATE 451 



darker; R, only one branched; Sc-Rj 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 

 ISGl Si a lis bifasciata Hagen, Synopsis Neur. N. Am. p.l88 



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 ]\IcLachlan. 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 Sc; 

 veins black, costal area narrow, slightly dilated, with about 

 seven C-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- 



