ino2.j 35 



A torrent which comes down from the hills behind the house, in 

 summer runs to earth before it reaches the Morfa. The water wells 

 up again in the sloping fields above the railway, under which it goes, 

 and is then carried across the Morfa in ditches, these ditches being in 

 parts grown up with water weeds ; and in some places where drainage 

 is either impracticable or has not been attempted, patches of swampy 

 bog exist. The greatest number of species were found in this area. 

 In the late evening hosts of caddis flies were about here. Phryganea 

 varia, F., in a small way, seemed to assemble like Hydropsyche ; 

 Limnophilus hirsutus, Pict., flew for a short time, just as it was getting 

 dark, and at the same hour Ecclisopteryx guttulata, Pict., Lepidostoma 

 hirtum, P., and P. geniculata, McL., were on the wing. Hydropsyche 

 instabilis, Curt., was usually in abundance a little earlier in the 

 evening. During the day other species were to be taken by sweeping, 

 or in flight, such as Sericostoma personatum, Spence (a most abundant 

 insect in several of the localities), Leptocerus aterrimus, iSteph., 

 Ifystacides azurea, L., Tricenodes bicolor, Curt., AdicelJa reducta, 

 McL., (Ecetis lacustris, Pict. (one), Polycentropus multiguttatus, Curt. 

 Holocentropus picicornis, Steph., Agapetus fuscipes, Curt., together 

 with numerous examples of Hydroptilidce, but only comprising 

 Hydroptila occulta, Etn., Oxyethira simplex, Pus, and f idea fa, Mort. 

 When it is remembered that in Wigtownshire 1 captured nine species 

 of the last named family, while in Wales I only took four, it will be 

 seen that the representation here is very poor. 



The torrent above the house produced abundance of Odontocerum 



albicomc, Scop., also Philopotamus montanus, Donov., Diplectrona 



felix, McL., Hydroptila forcipata, Etn., and at a tiny waterfall on its 



course, Tinodcs assimilis, McL. I), felix was also common at a rill 



running alongside the public road near Tal-y-bont. 



The lakes visited were not very productive in species. The 

 charming Llyn Cwm Bychan gave a few lacustrine species, such as 

 Limnophilus rhombicits, L., and marmoratus, Curt., Cyrnus trimacu- 

 latus, Curt., and Jlavidus McL. A stream near the lake produced 

 Chimarrha marginata, L., in abundance, and the river Artro, Hydro- 

 psyche lepida, Pict. Llyn-irddyn, another lake, gave multitudes of 

 Leptocerus fulvus, Pamb., and Tinodes wceneri, L. ; and the fine 

 stream, the Tsgethin, which unites the waters of Llyn-irddyn and 

 Llyn-bodlyn, was frequented by Philopotamus montanus in a form 

 which is practically the var. scoticus. On the lower parts of this 

 stream, (Ecetis testacea, Curt., abounded, and here also was found 



