References to Literature 391 



189. W. L. Distant. — (a) A Naturalist in the Transvaal. London, 



1892. (/>) Assimilative Coloration. Zoologist (4) ii., 1898. 

 (Also 88, 91.) 



g. Sexual Modifications. 



190. C. Darwin. — The Descent of Man and Selection in relation to 



Sex. 2nd. edition. London, 1874. 



191. P. Geddes and J. A. Thomson. — The Evolution of Sex. London, 



1889. 



192. E. B. PouLTON. — On the Courtship of certain European Acri- 



diidas. Trans. Ent. Soc. , 1896. 



193. C. ZiMMER. — Die Facettenaugen der Ephemeriden. Zeh. luhs. 



Zoolog., Ixiii., 1 898. 



(Also 88, 91, 181.) 



I'. Family and Social Life. 



194. G. W. and E. G. Peckham. — On the Instincts and Habits of the 



Solitary Wasps. Madison, Wisconsin, 1898. (See Poulton 



Nature, lix. I 899.) 



195. C. Verhoeff. — Beitrage zur Biologieder Hymenopteren. Zoolog. 



Jahrb. {Ahth. f. Syst.) vi., 1892 



196. A. FoREL. — Die Nester der Ameisen. Neujahrschr. Naturf. 



Gesell. Zurich, XCV. , I 893. 



197. A. MoLLER. — Die Pilzgarten einiger, siidamericanischen 



Ameisen. Botan. Mitt, aus dtn Tropen, 1893. 

 (Also 3. 113, 163, 164, 2CO.) 



/. Economic Entomology. 



198. E. A. Ormerod.— (a) Manual of Injurious Insects. 2nd edition, 



London, 1840. (i) Handbook of Insects Injurious to Orchards, 

 etc. London, 1898. 



199. J. T. C. Ratzeburg. — Die Waldverderber und ihre Feinde. (yth 



edition by J. F. Judeich), Berlin, 1876. 



200. F.R.Cheshire. — Bees and Bee-keeping. 2 vols. London, 1885-8. 



201. C. V. Riley. — Reports on the Noxious, Beneficial, and other 



Insects of the State of Missouri. Jefferson City, 1869-77. 

 (Also Insect Life, 7 vols., and the Bulletins of the U. S. Depart- 

 ment of Agriculture, Division of Entomology.) 

 fAlso 182.) 



VII. WORKS ON THE PEDIGREE OF INSECTS. 

 a. Origin of Wings. 



202. G. Gegenbaur. — (Trans, by F.';J. Bell). Elements of Com- 



parative Anatomy. London, 1878. 

 (Also I, 2, 36, 68.) 



