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



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

 tind April, 4 ; — 



Bees — Apidae: (V) Apis melliflca L. §, s. &c. p., freq.; (2j Ceratina 

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

 Sm. 9, s. ; (6) H. stultus Cr. $,8.; (6) Andrena vicina Sra. ^J*?, s.; (7) A. 

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

 Sm. $, s.; CIO) A. rugosa Rob. (J^$, s., fieq. ; (11) Colletes inaequalis Say 



&", s- 



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

 Syrphius americanus Wd., f. p.; (14) Eristalis dlmidiatus Wd., s. & f . p.; 

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

 frontosa Say, s. ; Muscidae: (17) Lucilia cornicinaF., 8., freq. ; Anthomyidae: 

 (18) Phorbia fusciceps Zett., s. 



On the literature of Hepatica see : — 



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

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

 hepatica. — (3) Axell, Om anordningarna for de fanerogaraa vaxternas be- 

 fruktning, 104. 1869. Anemone hepatica. — (4) Miiller, Weitere Beobaclitun- 

 gen. I: 43. Verb, naturhist. Vereins preuss. Rheinl. u. "Westfalens 1878. — 

 (5) Hildebrand, Die Farben der Bliithen in ihrer jetzigen Variation und 

 friiheren Entwickelung, 25, 28. 1879. H. triloba^ cyanic. (Just 7^: 110).— (6) 

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

 10. 1882. (Just 91 : 499).— (7") Miiller, Fertilization of Flowers, 71.1883. 

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

 Jahrb. Bot. Gartens Berlin 3: 114 (46). 1884.— (9) Scliroter, Gynodioecisme 

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

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

 mone hepatica. Arch. sci. phys. et. nat. III. 13: 409, 1885. (Jast 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. H. angulosa. — {li) Loew, 

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



AsiMiNA TRILOBA Diinal. — 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 



