202 The Scottish Naturalist. 



picking off by successive blows the small triangular pieces of glass which 

 stood out round the edge. The next station rid us of his society, though 

 he tried to convince the guard that we had been trying to rob him, showing 

 his bleeding hand as evidence. We had time to breakfast at Aberdeen, and 

 arrived at Edinburgh in the afternoon. 



I have made myself a tacit promise that whenever I can get a day" to 

 spare in Scotland, it shall be spent at Aberlady, perhaps the most success- 

 ful collecting spot I was ever in, though I have never yet been able to reach 

 what is described as the best place, having had my hands filled before 

 reaching it. Its most noticeable features in Diptera are the Dolichopodida 

 on the sea shore and in the wood by its side. This year I caught in abund- 

 ance Macharium maritime, Synarthrus pallipes, Dolichopus salinus (on 

 the mud like a Tachyti echus) D. ti ivialis, plumipes, uubilus, daviger (in the 

 wood, only unfortunately I mistook it for discifer), Gymnoptemus chtcrophylli 

 swarming on Umbellifercc in the wood) Sympycmus annutipes, Campsicnemus 

 armatus, (with very dark legs), Chrysohcs gramineus, Mcdeterus tntneorum 

 or teimicauda, Lav. Hydrophones bisetus, and PsUopus Wildemanni. 

 Hygroceleuthus diadema occurred sparingly, being I suppose nearly over, as 

 it was in abundance at the end of June, 1870 ; one PsUopus platypterus and 

 one Hydrophorus baltkus completed the captures in this family. 



In the Empidce I caught C/zersodrofum hirta (the first of the genus I ever 

 took), Hybos cidiciforinis, Rhcunphotnyia varialnlis and umbripennis, 

 Hilara litorea, interstincta, and a third species, the same as one I caught a 

 few of, near the mouth of the Cuckmere in Sussex last May. 



Beris geniculate: (one male), which I never saw alive before, Pachygashr 

 ater and A T emotelus idiginos2is (nearly over), represented the Stratiomyidir ; 

 but when I was at the locality in June 1870, A r e;notei?is ?//iginosus abounded, 

 and in its company was N. notatus, Zett., a species which I believe has 

 not hitherto been noticed as British, though I have seen it from other 

 localities. 



In the Syrphidcc I saw Syrphus tricinctus, glaucius, and vitripennis, 

 Cheilosia chloris (very shy), and on the marshy space just beyond the town 

 two or three HelophUus trivittatits hovered about the pools of water. In 

 the Muscidce I have named Elgiva dorsalis and Limnia ungukomis, and in 

 the Bibionidce, Scatopse pulicaria Lw. 



This list of my captures does not include a large number of Muscidce and 

 other small species, but is tolerably complete in the Syrp)ud<c, Dolichopodida 

 &c, and I have mentioned every species I know, however common, as the 

 locality will be the most northerly hitherto recorded in Great Britain for 

 many of them. 



The next night mail brought us back to London and business ; but the 

 holiday was thoroughly enjoyed, and we met with great kindness and 

 hospitality from all friends previously known by correspondence only. 



Occurrence of Nematus Wttewaalli Voll.— This year T have bred 

 from larvae found feeding on sallows, in Cakler Wood, near Glasgow. 

 Nematus Wttewaalli Voll. which is now, for the first time, recorded as a 

 native of Britain. As the insect and its transformations will be described 

 in an early number of the "Scottish Naturalist" I need not further allude 



