178 [January, 



"Wocke quotes as a doubtful synonym to this, the lielvetica of 

 Fi*ey, of which he saj^s " it seems to belong here ; worn specimens of 

 " monticola are just as pale." 



Immediately before monticola, "Wocke describes Trey's sfagjiaJis, 

 which occurs on mountain moors in Bohemia and in the Harz at the 

 end of June and the beginning of July, and if not already in our col- 

 lections, is extremely likely to occur with us. I therefore translate 

 the description : 



" Stagnalis, Frey, L.E., 13, 316. KilmuneUa, Nolcken, 705. Turfosella, 

 " Heinemann in lit. 



" Anterior wings black-grey, with a white fascia and two hinder spots placed 

 " almost exactly opposite ; cilia dark grey, at the apex white-grey, with a black 

 " dividing line beyond the middle, before which they are dusted with black ; the 

 " head dark grey. Length of wing, IJ — 2 lines (4 times as long as broad). 



" Smaller and shorter winged than the allied species, recognised by the whitish 

 " colour of the cilia beyond the dividing line and below the apex of the wing. 



"Anterior wings pale grey, the $ with the basal portion sometimes rather paler, 

 " but only slightly so, the fascia beyond one-third of the length of the wing entire, 

 " whitish, narrow, in other respects rather variable, sometimes quite perpendicular, 

 " sometimes from the fold to the costa inclining towards the base, or with a blunt 

 " angle in the middle pointing posteriorly ; the opposite spots as far from the fascia 

 " as the latter is from the base, exactly opposite and pointing towards each other, 

 " almost forming a second straight fascia nearly parallel to the first, though with a 

 " slender interruption in the middle, where, however, there is frequently a more or 

 " less distinct fine angulated marking as a connecting link, as in pocB. Cilia dark 

 " gi'PJ) tlie dividing line not far from the tips, previous to this line they are rather 

 " thickly dusted with dark scales. 



" Posterior wings half the length of the anterior wings, black-grey, with paler 

 " cilia, which are yellowish at the base. 



" Head dark grey, the face in certain directions paler, palpi moderately long, 

 " grey, internally yellowish-white, abdomen and legs grey, the former in the ^ with 

 " a long pale ochrcous-yellow-grey anal tuft, the hinder tibiee from the base to the 

 " middle sj^urs yellowish-white. 



" Ou the high moors of the Sudetic Mountains, and the Upper Harz, at the 

 " end of June and beginning of July. 



" Nolcken mixes this species {turfosellaj with monticola (formerly montana, 

 " Hein. in lit.), his notices suit especially to the former, and I also possess two males 

 " from him which leave no doubt. The distinctness of the two species is proved with 

 " certainty, from tlie different mode of life of the larva and the food-plant (I once 

 " hveA stagnalis ho'oi the leaf of a Carex), &\so, though both fly ou the Harz in 

 " neighbouring localities, they do not fly together and are out at different times." 



I may be dull of comprehension, but I confess I do not quite 

 follow Wocke as to " the different mode of life of the larva and the 

 " food plant ;" both feed on Carex — only monticola is said to mine the 

 stem, stagnalis the leaf. Is that the great distinction ? Mr. Sang's 

 larva first mines the leaf and then the stem. 



