80 THE entomologist's record. 



points overwhelmingly to the influence of " natural selection " 

 rather than that an excess of carbon in the soil, after assimila- 

 tion, first, by the plant to form its tissues, and then by the 

 larva when it eats it as food, should act in some unknown 

 way on the larva and thus affect the colour of the moth, in 

 the final stage of its existence. 



I have gone thus fully into what has been written con- 

 cerning "this physiological aspect of melanism," but I think 

 there has been very little written which will strike practical 

 lepidopterists as having any value in causing us to look on 

 melanism generally, as a result of phytophagic variation. 

 {To be continued.) 



gIBLIOGRAPHY. 



Additions to the BRrnsH List and Changes in Nomenclature. 



DiPTERA. 



Macq2iartia spi?iiciiichi, n. sp. Previously confounded with M. cxlebs 

 (R. H. Meade, E.M.M., pp. 156-157). 



Polidea crassitarsis replaces P. shnplicitarsis (R. H. Meade, E.M.M., 



P- 157)- 



Hemiptera. 



Dactylopius walkeri, n. sp. from specimens taken at Manley, Cheshire, 

 Sept., i8go, on Agrostis vulgaris (R. Newstead, E.M.M., 164, with 

 plates). 



Eriococcus insignis, n. sp. from specimens taken at Ince and Manley 

 (Cheshire), August and Sept., 1890, on Agrostis vulgaris, Rumex, Pteris 

 and Ulex (Id., E.M.M., 164-165, with plates). 



Eriococcus fraxini, n. sp. at Ince, August, 1890, on bark oi Fraxinus 

 excelsior (Id., E.M.M., pp. 165-166, with plates). 



Lepidoptera. 



Phisia bimaculata, St. = /', veriici/lata, Guen. {acuta, Walk.) (P. B. 

 Mason, E.M.M., p. 163). 



Viminia, O/spidia and Bisulcia, Chapman. Incorrectly referred by 

 Mr. A. G. Butler to Pharefia, Triaua and Arctomyscis of Hiibner 

 respectively (see " Scientific Notes" in this number). 



Erastria vetiustula, Hb. Referred by Mr. A. G. Butler to the genus 

 Hapalolis, Hb. with much doubt as to this genus being sufficiently 

 characterised. 



Hydj'CBcia lucens, Frr. (with vars, nov. pallida, ^risea and rufa); Cara- 

 drina superstes, Tr., H.-S. (with var. nov. suffusa) are treated as distil. ct 

 sub-species (J. W. Tutt, The British Noctuce a?id their Varieties). 



Helotropha leucostigina var. hmifia, Haw. = var. intermedia, Tutt ; 

 Gortyna ochracea var. flavago, Esp. = var. flavo-auratum, Tutt (J. W. 

 Tutt, The British Noctuce. atid their Varieties). 



Vimima menyanthidis var. salicis. Curt, is referred to V. ruinicis var. 

 salicis. Curt. (J. ^V. Tutt, The British Noctuce and their Varieties). 



