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 E. lalifolius visited by a flesh-fly, CalUphora erythro- 

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



According to Midler 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 iu 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 Sra. $; (2) H. zephyrus Sm. 

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

 Say $. 



Diptera— Syrphidae: (6) Syrphus ribesii L. ; (7) Allograpta obliqua Say; 

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

 Seoptera colon Lw. 



Coleoptera — Chrysomelidae : (11) Rkabdopterus picipes Oliv.; Mordel- 

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



On the pollination of Euonymus see : — 



(1) Fournier, De la Fecondation 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, 54, 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 5: 738)— 

 (6) Errera et Gevaert, Sur la structure et les modes de fecondation des 



