Dec. 1891] THE BRITISH NATURALIST. 



253 



Meyrick writes: — " A genus of limited extent, but cosmopolitan; more 

 species are known from America than any other region " fl.c. p. 485). 



T. pahidum, Zell. — This, the smallest and most delicate of all our 

 "plume" moths, is comparatively rare and exceedingly local in Britain. 

 The captures of the last few years have been almost entirely confined 

 to Dorsetshire. 



Synonymy — Paludwu, Zell. " Isis," 1841,866, " Linn. Ent. Zeit.,'' 

 VI., 400; Sta. "Man." II., p. 445; H.-S. ig, V., p. 382; Wood " Ind. 

 Ent.," 1854, p. 281, pi. 59. 



Imago — The imago is described by the Rev. O. P. Cambridge as 

 follows: — "The width of the upper wings, which are cleft at the 

 extremity, through half their length, into two lobes, is 6\ lines. Their 

 colour is greyish brown, tinged with chocolate. Each lobe has one or 

 two oblique white markings. A conspicuous one on the lower lobe is 

 formed by the long white fringe near the extremity on the lower 

 margin ; and is brought into relief by a black dash on its inner side. 

 There are also one or two other black dashes, and some black points, 

 formed by minute black scales on these lobes, giving that part a 

 prettily variegated appearance. The lower wings are three-lobed, 

 unicolorous, and destitute ol any black scales. The legs are greyish 

 brown, the extremities annulated with darker and white and furnished 

 with long blackish and white spurs" (" Proceedings Dorset Natural 

 History Field Club" &c.. Vol. VIII., p. 55). The imago is also 

 beautifully figured in the same work. Stainton describes it as : — - 

 "6'"-6-|-'". F.-w. yellowish-brown, with the lobes mtersected by two 

 slender whitish fasciae; third feather of h.-w. with no black tuft 

 ("Manual," Vol. II., p. 445). 



Larva — The larva is unknown, but in a letter Dr. Jordan wrote 

 to me he mentioned that he had from M. Milliere particulars of the 

 life-history of the allied baptodactyla which was quite different from 

 that of the Aciptilia. 



Time of Appearance — The insect is double-brooded, occurring 

 first in June and again in August. Mr. C. G. Barrett took a specimen 

 in Woolmer Forest in June, 1865 ("Entomologist's Monthly 

 Magazine," Vol. II., p. 263). "June," too, is the only date given in 

 Stainton's " Manual/' II., p. 445. The first examples of the Rev- 

 O. P. Cambridge's specimens were taken from August 23rd to 

 September 4th in 1886, Vv'hilst in 1887 he writes : — " The species would. 



