FLOWER POLLINATION 349 



3202. Semmola, Vincenzo. Delia caprificazione : esperienze e ragionamenti. Rend. 



Ace. sc, Napoli, iv, 1845, pp. 430-1. 

 Senebier, J. See under Spallanzani, L. 



3203. Senrat, L. G. Note sur la pollination des Cactees (Opuntia, Cereus). Rev. gen. 



bot., Paris, x, 1898, pp. 191-2. Ab. : Justs bot. Jahresber., Leipzig, xxvi, 

 (1898) 1900, p. 424. 



3204. Sergi, G. Ricerche su alcuni organi di sentore nelle antenne delle formiche. 



Riv. filos. scient., Milano, ix, 1891. 



3205. Shaw, Charles H. Inflorescences and flowers of Polygala polygama. Bot. Gaz., 



Chicago (111.), xxvii, 1899, p. 121. 



3206. The comparative structure of the flowers in Polygala polygama and P. pauciflora, 



with a review of cleistogamy. Trans. Bot. Soc. Pa., Philadelphia, i, 1901, 

 pp. 122-49. Ab. : Bot. Centralbl., Cassel, xc, 1902, pp. 662-3. 



3207. Shaw, Walter Robert. Contributions to the life-history of Sequoia sempervirens. 



Bot. Gaz., Chicago (111.), xxi, 1896, pp. 332-9. 

 Sherman, Franklin, /r. See under Brimley, C. S. 



3208. Shibata, Keita. Beitrage zur Kenntniss der Kelch- und Kapsel-Hydathoden. 



Bot. Mag., Tokyo, xv, 1901, pp. 19-25, 117-34. 



3209. Die Doppelbefruchtung bei Monotropa uniflora L. Flora, Marburg, xc, 1902, 



pp. 61-6. Ab. : Bot. Centralbl., Cassel, Ixxxix, 1902, p. 150. 



3210. Shimek, B. Perfect flowers of Salix amygdaloides Ands. Proc. Iowa Acad. Sci., 



Des Moines, iii, 1896, pp. 89-90. Ab. : Bot. Centralbl., Cassel, Ixx, 1897, p. 27. 



3211. Shoemaker, D. N. Notes on the development of Hamamelis virginiana Z. Johns 



Hopkins Univ. Cir., Baltimore (Md.), xxi, 1902, pp. 86-7. 



3212. Shiifeldt, R. W. The tulip-tree's flowers. Country Life in America, New York, iv, 



1903, p. 363. 



3213. Shull, George Harrison. A quantitative study of variation in the bracts, rays, 



and disk-florets of Aster shortii Hook., A. Novae Angliae Z., A. puniceus L., 

 and A. prenanthoides Mukl., from Yellow Springs, Ohio. Amer. Nat., Boston 

 (Mass.),xxxvi, 1902, pp. 11 1-52. Ab. : Bot. Centralbl., Cassel, xc, 1902, p. 24. 



3214. Sickmann, F. Die Hymenopterenfauna von Iburg und seiner nachsten Umge- 



bung. (i) Grabwespen. Jahresber. natw.Ver., Osnabriick, ix, 1893, pp. 39-112. 



3215. Verzeichnis der bei Wellingholthausen aufgefundenen Raubwespen. Op. cit., 



V, 1883, pp. 60-93. 



3216. Nachtrag zu voriger Arbeit. Op. cit., vi, 1885, pp. 175-83. 



3217. Simmons, P. L. Tropical Agriculture. [Ficus, pp. 478-80.] London, 1889. 



3218. Simon, F. Die Sexualitat und ihre Erscheinungsweisen in der Natur. Jena, 1883. 



3219. Skinner, H. Notes on Buprestidae (Coleoptera) with Descriptions of new species. 



[Tyndaris chamaeleonis sp. nov. on the flowers of Prosopis juliflora.] Ent. 

 News Acad. Nat. Sci., Amer. Ent. Soc, Philadelphia (Pa.), xiv, 1903, 

 pp. 236-9. 



3220. Slater, J. W. Flowers and insects. J. Sci., London, Ser. 3, v, 1883, pp. 217-23. 



3221. A question on the relation between insects and flowers. Proc. Ent. Soc, London, 



1886, pp. liii-lv. 



3222. On the functions of the antennae of insects. Zoologist, London, vi, 1S48, 



pp. 2175-77. Froriep's Notizen, Erfurt and Weimar, viii, 1848, col. 6-8, 



3223. On Insects destroyed by Flowers. Proc. Ent. Soc, London, 1879, pp. ix-x. 



3224. A flower attractive to Insects. [The so-called African stone-crop.] Entomologist, 



London, xiii, 1880, p. 72. 



3225. Slosson, Annie Trumbull. Hunting Empids. [Rhamphomyia umbilicata visits 



the flowers of Solidago at Franconia (N. H.).] Ent. News Acad. Nat. Sci., 

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