1881 . J 
221 
Pontresina and Samaden. 1th. proximo, McLacli. — Nearly fifty examples of what 
I am bound to consider proximo were taken at various torrents in the district (also 
one ? on the summit of the Julier Pass). In examining this long series, a good deal 
of variation is evident (independent of locality) in the form of the dorsal lobe and in 
that of the penis, which latter not infrequently has the angles distinctly (though but 
slightly) produced, and in this case difficult to separate from intermedia {contractu 
and fraudulent a I take to be sufficiently marked, according to present evidence), 
dhe examples are mostly very large (one expanding to 37 mm.). The variation 
in the horny anal parts is of somewhat serious interest ; in one $ the dorsal lobe 
forms an elongate triangle, and bad it not occurred with more ordinary conditions, 
this example must have been considered specifically distinct.- Rh. glareosa , 
McLach. At the torrent in the Val Languard, and at another between Pontresina 
and Samaden, also at a waterfall in the "Val Bevers ; tolerably common.- Rh. 
siigmatica, Kol. In company with the last at the torrents mentioned, and more 
common than it. 
PLANIPENNIA. 
SlALID^. 
Sialis lutaria, L. — Lake St. Moritz ; of ordinary size and colour; very late for 
this species. 
Chrysopid^:. 
Chrysopa vulgaris, Scbnd. — One example between Pontresina and St. Moritz ; 
the only species seen. 
Hemerobiid.e. 
Hemerobius nervosus, F. ? — A few $ from Val Eoseg, Val Bevers, and between 
Pontresina and Samaden ; beaten from larches (I am by no means certain that these 
are true nervosus, the £ having a short upturned ovipositor). H. fasciatus, 
Goszy. — A few examples with the last. 
CONIOPTERYGIDiE. 
Coniopteryx psocifonnis, Curt. — One example near the Morteratsch Glacier. 
PSEUDO-NEUROPTERA. 
Psocid^:. 
JElipsocus unipunctatus, Mull. — One example in the Val Roseg. 
Perlidjs.* 
Dictyopteryx alpina, Piet.- — On the Flatzbach and between Pontresina and 
Samaden ; taken singly. This is one of the few insects that can exist in glacier-fed 
streams. Along the Flatzbach the nymph-skins were numerous, sticking on stones, &c. 
In the Val Roseg I found three $ (under stones) of what must be a micropterous 
form, in which the wings are not longer than the abdomen when in a fresh state ; 
they agree with the long-winged form in all other respects. It is probable that this 
form was considered by Pictet as the d {<]f. “ Perlides,” p. 162, pi. viii, fig. 7) ; the 
examples before me appears to be certainly $ . In a series of nearly 20 examples of 
D. alpina I find only two or three that seem to be J , and in those the wings are not 
abbreviated. 
* The nomenclature in Lists of Perlidce must be considered as approximate only ; there 
are few Families of insects that, so greatly need thorough revision, and in which the difficulties 
are so many. 
