1892. Flowers and Insects. 273 
Hymenoptera—A pide: (1) Bombus americanorum F. 9, s. 
andc. p., ab.; (2) Synhalonia speciosa Cr. 9, s. and c. p.; (3) 
Ceratina dupla Say 9, c. p.; (4) Megachile brevis Say 29, s.; 
(5) M. montivaga Cr. 49, s. and c. p., ab.; (6) Alcidamea pro- 
ducta Cr. 9, c. p.; Andrenide: (7) Agapostemon nigricornis 
F.9,¢. p., ab.; (8) Augochlora pura Say 9, c. p., freq.; (9) 
Halictus pectoralis Sm. 9, c. p.; (10) H. parallelus Say 8, ¢. p.; 
(11) H. lerouxii Lep. 9, c. p.; (12) H. ligatus Say 9, ¢. p.; 
(13) H. fasciatus Nyl. 9, c. p.; (14) H. albipennis Rob. 9, c. 
P-; (15) H. confusus Sm. 9, c. p. 
Diptera—Syrphide: (16) Syrphus americanus Wd., f. p.; 
(17) Sphaerophoria cylindrica Say, f. p.; (18) Eristalis dimid- 
fatus Wd., f. p.; (19) E. latifrons Lw., f. p.; (20) Tropidia 
mamillata Lw., f. p.; Tachinide: (21) Cistogaster pallasii 
wns., f. p. 
Lepidoptera—Rhopalocera: (22) Pieris protodice Ba: 
(23) Pamphila peckius Kby.; (24) P. cernes B.-L.—all s. 
Coleoptera—Chrysomelide - (25) Diabrotica 12-punctata 
Oliv., £. p-; Curculionide: (26) Centrinus scutellum album 
Say, f. pi, ab: 
_ GAURA BIENNIS L.*—This common species was observed 
in bloom from August 4th to October 24th. The stems grow 
one or two metres high, bear numerous flowers, and are often 
collected in large patches. 
€ flowers are white. The four petals are all turned to 
the upper side of the flower, and the stamens, which are di- 
rected horizontally, afford a landing place to the visiting in- 
Sects. The stigma is in advance of the anthers and touches 
the bee before them. The calyx tube is about 10 mm. long. 
he flowers are adapted to long-tongued bees, but on account 
of the-exposure of the anthers are also visited for pollen by 
other insects. The list was observed on 5 days, between 
"g- 23d and Sept. roth. 
yMenoptera—A pide: (1) Apis mellifica L. %, ©. p.i (2) 
mbus americanorum F. &, s. and c. p., ab.; (3) B. virgini- 
Dee Oliv. &, ¢, p-; (4) Melissodes bimaculata Lep. 9, S. and c. 
P. pa ndrenida : (5) Halictus confusus Sm. 9, ee 
'ptera—Syrphide: (6) Syrphus americanus foweln ie 
b CIRCAA LUTETIANA L.—The flower is described and figured 
°¥ Miiller in the Fertilization of Flowers, 265. Miller saw 
4 Corsa eee mea Meme Se ne te 
ised Sprengel; 223, Pl. XIII, 12, 14, 15. See G, Lindheimer, Goodale & 
Bue: Wild flowers, Pl. XXIIL 
