154 Trans. Acad. Sci. of St. Louis. 



time. The following list was observed on March 21 and 29, 

 and April, 4 : — 



Bees — Apidae: (1) Apis melliflca L. g, s. &c. p., freq. ; (2) Ceratina 

 tejonensis Cr. ^f, s.; Andrenidae: (3) Halictus sp. $,s. ; (4) H. confusus 

 Sm. 9 , s, ; (5; H. stultus Cr. $ , s. ; (6) Andrena vicina Sm. fj' ^ > s. ; (7) A. 

 erythronii Rob. (j^, s.; (8) A. mandibularis Rob. f^, s.; (9) A. flavoclypeata 

 Sm. 9, s.; (10) A. rugot^a Rob. ^^9,8., freq.; (11) Colletes inaequalis Say 



Flies — Bombijlidae: (12) Bombylius major L., s., freq.; Syrphidae: (13) 

 Syrphus americanus Wd., f. p.; (^li) Eristalis dimidiatus Wd., s. & f . p.; 

 (15) Brachypalpus frontosus Lw., s. & f . p., freq.; Tachinidae: (IG") Gonia 

 frontosa Say, s.; 3Iuscidae: (17) Lucilia cornicinaF., s.,treq.; Anthomyidae: 

 (18) Phorbia fusciceps Zett., s. 



On the literature of Hepatica see : — 



(1) Sprengel, Das entdeckte Gelieimniss, 31, 291-2. 1793. Anemone hepa- 

 tica. — (2) Irmisch, Montrose Anemonenbluthien. Bot. Zeit. 1848: 217-18. A. 

 hepatica. — (3) Axell, Om anorduiugarna for de fanerogama viixternas be- 

 fruktning, 104. 1869. Anemone hepalica. — (4) Miiller, Weitere Beobachtun- 

 gen. I: 43. Verti. naturliist. Vereins preuss. Rlieinl. u. Westfalens 1878. — 

 (5) Hildebrand, Die Farben der Biiithen in itirer jetzigen Variation und 

 friiheren Entwicljelung, 25, 28. 1879. H. triloba^ cyanic. (Just 1'^: 110).— (6) 

 Miiller, Die Stellung der Honigbiene in der Blumenwelt. Bienenzeit. 38 : No. 

 10. 1882. (,Tust 91; 499).— (7) Miiller, Fertilization of Flowers, 71.1883. 

 H. triloba. — (8) Loew, Blumenbesuch von Insekten an Freilandpflanzen. 

 Jahrb. Bot. Gartens Berlin 3: 114 (4G). 1884.— (9) Schroter, Gynodioecisme 

 ctiez Anemone hepatica. Arch, sci.phys. etnat. Geneva 14: 283. 1885.— (10) 

 Calloni, Fleurs unisexu^es et mouvement spontan6 des etamiues dans 1' Ane- 

 mone hepatica. Arch. sci. phys. et. nat. III. 13 : 409. 1885. (Just 13^ : 751) — 

 (11) Schulz. Beitrage zur Kenntniss der Bestaubungseinrichtungen und 

 Geschlechtsvertheilung bei den Pflanzen. 2: 178. 1890. — (12) Kerner, Pflan- 

 zenleben 2:126, etc. 1891. — (13) Hansgirg, Neue biologische Mittheil- 

 ungen. Bot. Centralblatt 52: 386. 1892. //. angulosa. — (14) Loew, 

 Bliitenbiologische Floristik, 177, 377. 1894. E. triloba. 



AsiMiNA TRILOBA Dunal. — Common Papaw — Delpino 

 (1-4) has given so complete an account of this flower that 

 there is hardly anything new that can be said about it. It is 

 our best example of a flower* adapted to flesh-flies (sapromyi- 

 ophilous). It is pendulous, broad bell-shaped, with dark 

 purple color and an odor which Delpino compares to that of 

 leaven. The short-lived stigmas protrude from the hemispher- 

 ical mass of stamens and are receptive before the latter dis- 

 charge, so that we have a very well marked case of protero- 

 gyny. The three outer petals are larger and form the most 



