70 



The color of the vertex is usually white or gray, but it is 

 sometimes ochreous, and in one specimen it is even orange ; the 

 front almost always varies in the same manner, but in a less 

 degree. 



No two specimens have their wings of exactly the same 

 shape, but in general the variation is only slight ; in some fe- 

 males, however, the elongation of both pairs is quite percepti- 

 ble, and in such specimens the costa is more strongly arched 

 than usual, and on the posterior wings the costal angle is less, 

 and the anal anode greater ; in one well marked insect of this 

 group the posterior wings are shorter and more triangular than 

 in others. 



I have described the principal types of variation, and have 

 given a few examples under each ; it would be quite impossible 

 to characterize them all within the limits of this paper. I know 

 of no Geometrid in which there is so much variability in char- 

 acters which are usually in this family constant and of specific 

 value. H. K. Morrison. 



BIBLIOGRAPHICAL RECORD. 



Authors and Societies are requested to forward their -works to the Edi- 

 tor at the earliest date possible. We ask our readers to inform us of the 

 publication especially of those works which are not generally consulted by- 

 entomologists. B. Pickman Mann. 

 (Continued from page 64.) 



pleasures of defence against insects not being a part of the 

 science of entomology, although of small value in its absence, they 

 will only be noticed hereafter, in this Record, when given in con- 

 nection with some matter of entomological import. 



In addition to articles on Insects, we shall hereafter record 

 articles on all other Arthropoda, except Crustacea.'] 



* 173. The Proc. Bost. Soc. Nat. Hist, [see Rec, Nos. 

 1-10], vol. xvi, from p. 209, contain the following, and Nos. 

 174-177. 



a. On the disposition made of some of Abbot's paintings of insects (by 

 S. H. Scudder), p. 295 (see also, vol. xvii, p. 10-11). b. On the capture 

 of Argynnis polaris by the Polar Expedition (by S. H. Scudder), p. 365. 



* 174. A. R. Grote. Descriptions and Notes on the Noc- 

 tuidse. p. 239-245. 



Enumerates 15 species ; describes 10 (9 ? new) species. 



