172 THE entomologist's record. 



production of melanism, which I assume is moisture ; (2). The 

 general protective influence of " natural selection." The same 

 cause (moisture) does produce the same effect, viz., the 

 darkening of the ground colour, but the second influence of 

 environment, governed by " natural selection," plays a still 

 stronger part, and I would again ask my readers to bear in 

 mind that, if anything in the environment tends to the pro- 

 tection of a certain form, that form will be produced to the 

 almost entire exclusion of all others, and a permanent local 

 form will be established. In Polia chi these forces are un- 

 doubtedly at work, and, until my readers will master the fact 

 that any secondary influence may modify, or almost entirely 

 obliterate the original effect, very little can be done towards 

 the mastery of this subject. 



{To be continued^ 



Bibliography. 



Additions to the British List and Changes in Nomenclature. 

 Lepidoptera. 



Miafia arcuosa v. morrisii C. W. Dale ( = AcosDietia morrisii), Etit. 



Rec, 34. 

 Ciispidia aceris Lewcock and Hanes { = Aavnyda'^ aceris). Ent. 



Rec, 167. 

 Retinia tnargarotana H.-S., C. G. Barrett. Ent. Mo. Mag., Feb., 49. 



Scotland. 

 Doryphora clougella Hein. \^Doryphorella elongeUa\ C. G. Barrett. 



E7it. Sac. Lond., April 2. 

 Gelechia portlandicella n, sp. Richardson. Ent. Mo. Mag., Feb., 29. 



Portland. 

 Tinagma betulcB n. sp. Stainton, Etit. Mo. Mag., Oct., 264 (imago). 



J. H. Wood, Ejit. Mo. Mag., Oct., 261-264 (life history). 

 Prof. J. B. Smith has published (1890) a bulky revision of the North 

 American moths formerly referred to the genus Agroiis {Bull. U. S. 

 Nat. Mus., No. 38). The generic nomenclature is considerably revised, 

 and although the work relates only to American species it is of impor- 

 tance in relation to the British fauna, several of our species being found 

 in the United States. 



Prof. Smith adopts the genus Feridroma Hbn. for Agrotis saucia and 

 other species. 



In Canad. Ento?n., Sept., 173-175, the present writer suggests the 

 use of plural section names for groups of species which do not seem 

 well separated as genera or subgenera, and yet show affinities which 

 ought not to be overlooked. Of the names proposed, Antiopx includes 

 our Vanessa antiopa, Rusiici includes Lyccena cegon, and Chrysophaiitdi 



^ Grote, in his recent (1890) Check-List of North American Noctuidce divides 

 Acrofiycta into ten subgenera. 



