1907. J 105 



to me preferable, as the above diagnosis will show, to regard them as 

 fuscous with yellow markings, but it is merely " a distinction without 

 a difference." 1 have not at hand Havvorth's original description of 

 latifasciana, published iu Trans. Ent. Soc. Lond., i, 337 (1810), but 

 have little doubt that he took the latter view, and that the broad fascia 

 that suggested the name is the i/eUoiv one: in any case, this was 

 obviously so when he gave the name aurofascicma to this same species 

 in Lep. Brit., 4<68 (1S12), for it must be remembered that his lati- 

 fasciana of Lep. Brit., iL4, is not the Tortrix under notice, but Acalla 

 schalleriana, L. 



1 learn from Mr. Vine that the latter half of July is the best 

 time for the imagines of jSJ. latifasciana, which fly, rather high, from 

 about 4 to about 7 p m. He used to watch for them as they approached 

 the ash tree with a spinning flight and alighted on the bunches of 

 old seeds, from which they were then beaten out and netted, but 

 he failed to ascertain whence they came, and says that they certainly 

 do not roost among the ash seeds, and that a large supply of these, 

 collected in the hope of breeding the insect therefrom, only yielded 

 Argyrotozn conwayana, Eb., iu abundance. On the Continent the larva 

 is found, in the spring, in galleries amongst moss on ti'ee-trunks, but 

 Mr. Vine tells me that there was very little moss on the trunk, and 

 none at all on the exposed roots, of his extraordinarily productive 

 ash tree. 



Norden, Corfe Castle : 



April IGth, 1907. 



THE MIGRATION OF AQUATIC REMIPTERA. 

 BY N. M. EICHARDSON, B.A. 



On September 2(jth, 1904, Mrs. Richardson was standing by a 

 small pond in one of our fields at about 11 a.m., when she noticed 

 that there was something unusual going on amongst its inhabitants 

 and called me to see it. The pond is a shallow one, never dry, like 

 many of these field ponds, about seven or eight yards in diameter, 

 and there is a similar slightly larger cue on the other side of the 

 hedge. It is a good deal shaded by trees, and the margin of it is 

 soft mud. Numbers of "water-boatmen" {Gorixa geofroyi, Leach) 

 were coming up out of the water to the edge of the pond, parts of 

 the shore being often lined with a rank two or three deep. They 

 mostly remained for a short time in the water, on the surface, within an 

 inch or two of the shore, and as soon as the sun came out, which it did 



