Mr. Edward Forster on Mnium annotinum. 433 



scuriores extrorsum fuscescentes. Tibia3 anteriores setis nullis supra praeapi- 

 calern parvam, posticae unica media Alae hyalinae exunguiculatae, nervis 

 obscure flavescentes squama? albidas. Halteres fiavi." — Hal. in litteris. 



This is from the same locality mentioned for the Limnobia (or 

 Idiocera ?) sex -guttata, viz. Cosmore common, Glanville's Wootton, 

 and New Forest, middle of June and beginning of July. Mr. Haliday 

 at first thought it new and named it albicornis, but as Meigen has one 

 so named he thinks it may be as above ; it varies however from it in size. 



I sent Mr. Haliday a pair of Limnobia (or Idioptera ?) allied to 

 marmorata, which I take only in one locality near this part ; and as 

 they agree in size and markings, I fancied they might be distinct. 

 Mr. H. has also taken it in Ireland, and thought the same formerly ; 

 but having observed marmorata to vary much, and not being able to 

 lay hold of any tangible character, he has come to a very different 

 conclusion ; he formerly named it fasciata ? (which Wiedman has 

 changed to pulchella), and asks me how it agrees with the I. fasciata 

 I had from Mr. Wailes, taken in the lake district, which has a di- 

 stinct fascia, which the other has not. Mr. Haliday has likewise a 

 third species, the /. trimaculata, Zett., taken near Belfast. I also sent 

 him a pair of Hemerodhomia, which he decidedly says are only a var. 

 of H. monostigma, although in size and colour they closely resemble 

 H. mantispa ; but the nerves of the wings at once remove them from 

 that division. 



I have lately had sent to me from my liberal correspondent Mr. 

 Edleston of Manchester, a Geometra <$ (so like Cidaria badiata, 

 930, 2 of Curtis's Guide, that I can see no difference), taken on the 

 moors in September with an apterous female (also sent) which is 

 new to me. G. badiata has a winged ? and flies in March and April. 



I have an Hermaphrodite Dilophus vulgaris, one ( $ ) wing white 

 and the other (?) black : the size of the white side is much smaller, 

 and the same half-side of body is also smaller in proportion. I have 

 also an hermaphrodite JEgeria ichneumoniformis, Brit. Ent., which 

 on one side has the antenna ciliated, and on the other plain like the $ . 



Glanville's Wootton, Jan. 1, 1842. 



LII. — On Mnium annotinum of Linnceus. By Edward 

 Forster, Esq., V.P.L.S. 



To Richard Taylor, Esq. 

 My Dear Sir, 

 It sometimes happens that a plant well known formerly is 

 now forgotten. This is the case with Mnium annotinum of 

 Linnaeus, one of the most remarkable among the mosses ; yet 

 it has been totally neglected or badly understood, though fifty 

 years since, no cryptogamist had any doubts concerning it. 

 Difficult indeed it is to account for the present ignorance of 

 this Bryum, unless it arose from the plate 1862 in the 28th 

 Ann. $ Mag. N. Hist. Vol. viii. 2 F 



