AD0 NEW YORK STATE MUSEUM 
from Webber lake, Cal., agree with this characterization, and are 
like the European specimens in the Museum of Compara ts 
| Zoology. 
3 §. nevadensis n. sp. 
Body black; head not narrowed behind, black with orange 
band clear across the caudal half and reaching around under the 
eyes to the antennae, smooth streaks and spots of the same color 
in the orange band above, no such spots between the antennae; 
eyes black; prothorax hardly narrower than the head, black, 
not at all marked with the orange color, anterior angles obtuse; 
antennae black, very slender; feet and legs black; legs pilose; 
wings black, translucent, either shining or dull, veins darker if 
possible; Sc-R, cross veins only one or two; R, with two simple 
or forked branches. Length to tip of wings 18 to 25 mm; alar 
expanse 38 to 40 mm. 
Collected by Morrison at Reno Ney., 1878. In Nevada county, 
Cal., June 12, 1880, said to be “ very injurious to grapevine,” or 
“injuring grape leaves.” Types in United States National Mu- 
seum catalogue no. 5177. 
4 §. morrisoni n. sp. 
Body black; head and thorax shaped and marked as in 8. 
nevadensis; legs and feet ferruginous; wings ferruginous, 
veins hardly darker; venation as in that species. Length to tip 
of wings 20mm; alar expanse 40mm. 
Collected by Morrison, Reno Neyv., 1878. Type in Museum of 
‘Comparative Zoology. , 
5 §. americana Rambur 
1842 Semblis americana Rambur, Hist. Nat. Neur. p.447 
18538 Sialis ferrugineus Walker, Cat. Brit. Mus. Neur. p.195 
1861 Sialis americana Hagen, Synopsis Neur. N. Am. p.188 
1892 Sialis americana Banks, Am. Ent. Soc. Trans. 19:357 
General color ferruginous; head narrower behind; eyes black; 
caudal half of head. with flat streaks and spots shining and sur- 
rounded with ferruginous; antennae ferruginous; anterior 
angles of prothorax square; prothorax a little narrower than 
the head, sides with yellowish impressed punctures; femora fer- 
ruginous; feet fuscous; wings pale ferruginous, the veins 
