220 
[March, 
Stenophylax picicornis, Piet. — Tlie 3 common at a lateral streamlet in the Val 
Ro6eg, but only one 9 ; one 9 near the Statzer-See. S. latipennis, Curt. Yal 
Celerina, two very dark 9 • 
Ibalesus digitatus, Schrk. — One 3 between Pontresina’and Samaden (probably 
early), darker than examples from flat districts. H. mjicollis , Piet. — More than 
twenty examples ; especially frequent at a torrent between Pontresina and Samaden 
(I now suspect that H. moestus, McLach., is not distinct). H. hilaris, McLach. — 
One 9 at the torrent above-mentioned (probably early). H. auricollis, Piet. 
Scarce (probably early). Two 3 between Pontresina and Samaden, one 9 011 
summit of the Julier Pass. 
Metancea Jlavipennis, Piet. — Generally distributed ; very common in the Yal 
Celerina ; varying greatly in size. 
Drusus discolor, Rbr. — Generally distributed and common ; about fifty examples, 
varying much in size and in the comparative duskiness or brightnes of the wings. 
D. chrysotus, Rbr. — Rare. One 3 and one 9 hi the Yal Roseg near the glacier, one 
9 in the Yal da Fain. D. trifidus , McLach. — Streamlets supplying the Statzer- 
See ; more common at small streamlets between Pontresina and Samaden. The 
examples are remarkably small. 
Cryptothrix nebulicola (Hag.), McLach. — Abundant at the torrent in the Yal 
Languard, and also at another between Pontresina and Samaden ; those from the 
latter locality are very large. 
Potamorites biguttatus, Piet. — Three very dark 3 at a streamlet in the wood 
opposite Pontresina, but no 9 : thirteen 9 along the stream in Yal Bevers, but no 
3 (almost the only species found along this snow-fed stream). I am at a loss for a 
reason to account for this unequal distribution of the sexes. The 9 shows great 
variability in the length of the discoidal cell, as already remarked. 
Leptocerid^:. 
Bercea pullala, Curt.- — Two 3 at boggy ground in Yal Bevers. 
Odontocerum albicorne, Scop.— Yery common at the Lake St. Moritz; also 
along the Inn between Celerina and Samaden. 
Mystacides nigra, L. — Lake St. Moritz. 
Hydropsych id.®. 
Dolophilus copiosus, McLach.- — One 3 hi the Yal Celerina. 
Wormaldia occipitalis, Piet. — One 3 between Pontresina and St. Moritz. 
Plectrocnemia covspersa, Curt. — One 3 a t the stream between the Statzer-See 
and Lake St. Moritz. 
llolocentroptis dubius, Rbr. — One 3 at the Statzer-See. 
RHYACOPHILIDiE. 
Rhyaco'phila persimilis, McLach. — A few examples at the falls of the Inn at 
St. Moritz. A few others from the stream between the Statzer-See and Lake St. 
Moritz show a distinct difference, although the localities are so near each other. 
They have the dorsal process shorter and broader, and the dilatations of the penis 
more acute, thus showing a tendency towards llh. acviidens, McLach., without, 
however, being sufficiently pronounced to be identified therewith. Rh. vulgaris, 
Piet. — Decidedly scarce ; taken singly above the Mortcratscli glacier, and between 
