158 Trans. Acad. Sci. of St. Louis. 



Muscidae, while in the Tyrol Schulz observed many flies, bees 

 and wasps, and beetles. In the Berlin Garden, Loew (8, 9) 

 saw ^. laiifolius visited by si flesh-fly, Calliphora erythro- 

 cephala^ and our E. americanus visited by the hive-bee. 



According to Muller E. europaeus is proterandrous, with 

 spontaneous self-pollination impossible. According to Schulz 

 the proterandry is sometimes only slight. (See 2.) 



EuoNYMUs ATROPURPUREUS Jacq. — Waahoo. — This is a 

 small tree bearing numerous small, dark purple, pendulous 

 flowers in loose cymes. The flowers expand horizontally for 

 about 8 mm. In the center is situated a nearly square flat 

 disc which secretes nectar. Each angle of the disc bears a 

 nearly sessile anther, while in the middle is situated a stigma 

 which is also nearly sessile. The flowers are proterandrous. 

 The stamens and style are so short that, I think, pollen is 

 carried mainly upon the feet and proboscides of the insects. 

 The flower has a disagreeable odor, which, with the dark pur- 

 ple color, would probably place it in Delpino's Tipo melantino, 

 along with E. verrucosus. These characters suggest an adap- 

 tation to flesh-flies, but my observations as yet do not confirm 

 this view. 



I have found the flowers in bloom from the 28th of May, 

 to the 23d of June. The following visitors were taken on 

 June 8, 11 and 15 : — 



Bees — Andrenidae: (1) Halictus confusus Sm. 9> (2) H. zephyrus Sm. 

 9 ; (3) H. stultus Cr. 9, freq. ; (4) Augochlora labrosa Say 9 ; (5) A. pura 

 Say ?. 



Diptera — Syrphidae: (6) Sjrphus ribesil L. ; (7) Allograpta obliqua Say ; 

 (8) Mesograpta marginata Say; (9) Baccha tarchetius Wlk.; Ortalidae: (10) 

 Seoptera colon Lw. 



Coleoptera — Chrysomelidae: (II) Rhabdopterus plcipes Oliv. ; Mordeh 

 lidae: (12) Mordellistena ornata Melsh. — All sucking. 



On the pollination of Euonymus see : — 



(1) Fournier, Dela F^condation dans les Phanerogames, 118. 1863. Pro- 

 terandry. — (2) Delpino, Altri apparecchi dicogamici recentemente osser- 

 vati. Nuovo. Giorn. Bot. Ital. 2: 52. Proterandry. 1870.— (3) Miiller, Be- 

 fruchtung der Blumen, 153. 1873. Fertilization of Flowers, 162. 1883.— (4) 

 Delpino, Ulteriori osservazioni. II. 2: 25, 64, 160, 214, 300, 302. 1875. Atti 

 d. soc. Ital. d. sci. nat. in Milano 16: 173, 202, 308. 1873. 17:—. 1874. (Just 

 2: 883, 895). — (5) Darwin, Forms of Flowers, 287-93. 1877. (Just 6: 738)— 

 (6) Errera et Gevaert, Sur la structure et les modes de f^condation des 



