1889.] 4 23 



with us. Many examples of a highly melanic form are also from 

 Reykjavik. In these the anterior-wings are nearly suffused with 

 blackish-fuscous, and almost without markings, reminding one of some 

 small high- alpine forms of bipunctatus, or a not uncommon form of 

 sparsus. All gradations between the pale and dark, and the large and 

 small, occur. 



Apatania arctica, Boh. Reykjavik, 3 $ . 



Truly an inhabitant of the boreal and arctic islands and probably 

 mainland, and which must be usually, if not entirely, parthenogenetic. 

 The Icelandic examples appear identical with others from Spitzbergen 

 (the typical locality) ; naturally there is danger in determining insects 

 of this genus of which only the ? is known, and especially from dry 

 specimens. 



All the above, with the exception of A. arctica, have been 

 previously recorded from Iceland. So also have Limnophilm eleqans, 

 Curt., taken by Gaimard, and now in the Museum of the Jardin des 

 Plantes at Paris {cf. Revis. and Synop., Suppl., p. xviii) ; and L. miser, 

 McLach. {I. c, p. vii). 



On the other hand, two species have been incorrectly recorded 

 from the island, viz. : L. bipunctatus, Curt. (Re vis. and Synop., p. 88), 

 the locality proving to be erroneous (Suppl., p. vii), and L. trimaculatus, 

 Zett. {cf. Hagen, Neurop. IS". Amer., p. 262), which proved to be 

 L. miser, McLach. 



Staudinger, in the account of his journey in Iceland (Stett. Zeit., 

 1857), mentions having taken seven species of Triclioptera [also 

 Hemerobius nervosus, F. (determined by Stein), and a Capnia~\. Some 

 much earlier records are too vague to be of importance. 



The following species have been recorded from the Faroe Islands, 

 which lie nearly half-way between Unst in Shetland and Iceland, viz. : 

 Limnopliilus griseus, L., L. sparsus, Curt., Plectrocnemia conspersa, 

 Curt., and Rhyacophila dorsalis, Curt. The last two frequent streams. 

 It is somewhat singular that all those recorded from Iceland may be 

 presumed to inhabit standing water in the larval stage, the Apatania 

 possibly excepted ; but Mr. Mason suggests a possible reason for the 

 apparent absence of torrentine species, viz., the fact that the streams 

 are, almost without exception, fed by glacier water. 



Lewishani, London : 



September 21st, 1889. 



