Of Chiffchaff.--[The difficulty of determining Chiffchaffs and Willow Wrens at any time, but more especially in autumn, even to an expert, must in great measure militate against almost any records of "Chiffchaff" at Isle of May. Yet there can be no doubt that it has occurred there, certainly in October 1884; and on one or two more occasions certain. There are many records of "Chiffchaff" at Isle of May; but it is impossible to say which are correct identifications, and which are really immature Willow Warblers. That the Chiffchaff does occur is undoubted, but to what extent is yet uncertain. Henceforth, until certainty can be arrived at, we will only mention Chiffchaffs in inverted commas.--J. A. H.-B.] "Chiffchaff"--a single record at Isle of May on 12th April, and Willow Wren very numerous on 19th May. One "Chiffchaff" also noted on 5th May. _In Autumn._--Goldcrests numerous on October 24th at Isle of May; and numbers at Pentland Skerries, from 17th to 27th, all day long. Seems to have been pretty general, as it is spoken of at Noss Head, also on 24th; at Inchkeith, in small numbers, 7th, 8th, and 9th (light E. breezes). Numbers all day on Fidra on 8th October, and also at Sumburgh Head on 7th and on 20th, and at Girdleness on the 21st. Numerous at Isle of May up to 30th. "Chiffchaff"--a solitary record of one at Isle of May on 27th August. A great number (rush) of Willow Warblers at Isle of May on 1st September--light W., fog--along with Sedge Warblers. "Chiffchaff" is also recorded from North Unst by Mr Charles Youngclause--light N.E., haze--a single bird. Numbers again of "Chiffchaffs" at Isle of May on 19th. Those who have their doubts about the occurrence in any number of the Chiffchaff (_vera_) can read the above together with the entries of _Willow Warbler_. The migration of _Phylloscopinæ_ is thus compressed into October, with one rush in September of Willow Warblers, which appears to have been preceded by one example of "Chiffchaff" four days before. In preceding spring very pronounced on 18th and 19th May at same station, Isle of May, of Willow Warblers. Accentorinæ.--Hedge Sparrows.--_Spring._--Only two records on 12th April at Isle of May (resident all winter); and at Pentland Skerries on 19th, two--S.E., haze; and on 18th May, at Isle of May, a brood of young "now flying." _In Autumn_--only record at Pentland Skerries, one seen all day--light S.W.; "seldom seen here." Acrocephalinæ.--Sedge Warbler.--No spring notice. In Autumn--only two in August at Isle of May. Sedge Warbler, one, on 20th--calm, clear; and on 23d, two--light S.E. wind; but large numbers (in company with Willow Warbler rush) at Isle of May on 2d September. The Willow Warbler rush came on the 1st, the Sedge Warblers on the 2d; the former at 2 A.M. of that day--light W., fog; the latter at 11 A.M. of the next day--light W., and clear. Troglodytidæ.--Wren.--Nests on Fidra. No spring records.