1881.] 221 



Pontresina and Samaden. Rh. proximo,, McLach. — 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 (contracta 

 and fraudulenta I take to be sufficiently marked, according to present evidence). 

 The 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 had it not occurred with more ordinary conditions, 



this example must have been considered specifically distinct. Rh. glareosa t 



McLach. — At the torrent in the Yal Languard, and at another between Pontresina 



and Samaden, also at a waterfall in the Yal Bevers ; tolerably common. Rh. 



stigmatica, Kol. — In company with the last at the torrents mentioned, and more 

 common than it. 



PLANIPENNIA. 



SIALID.E. 



Sialis lutaria, L. — Lake St. Moritz ; of ordinary size and colour ; very late for 

 this species. 



CHRYSOPID.E. 



Chrysopa vulgaris, Schnd. — One example between Pontresina and St. Moritz ; 

 the only species seen. 



Hemeeobiid^;. 



Hemerobius nervostis, F. ? — A few $ from Yal Eoseg, Yal Bevers, and between 

 Pontresina and Samaden ; beaten from larches (I am by no means certain that these 



are true nervostis, the $ having a short upturned ovipositor).- H. fasciatus, 



Goszy. — A few examples with the last. 



CONIOPTERYGID^. 



Coniopieryx psocif ormis, Cvrt. — One example near the Morteratsch Glacier. 



PSEUDO-NEUROPTERA. 



Psocid^:. 



Elipsocus unipunctatus, Mull. — One example in the Yal Roseg. 



Perlid^:.* 



Dictyopteryx alpina, Pict. — 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 Yal 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 <$ {of. " 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 <? , 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. 



