24 
BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 5, NO. 1. 
Andrenidse: (4) Halictus provancheri D. T. female, s. and c. p.; 
(5) H. connexus Cr. female, s. and c. p.; (6) H. zephyrus Sm. 
female, s. and c. p.; (7) H. pilosus Sm. female, s. ; (8) Prosopis 
modesta Say female, s. ; (9) P. aMnis Sm. female, s. 
B. Diptera 
Syrphidae: (10) M eso gramma geminata Say; (11) Spluero- 
phoria cylindrica Say ; Muscid?e: (12) Lucilia ccesar L. — all s. 
or f. p. 
Allium Canadense L. Meadow Garlic. 
The flowering period is from June 19 to July 17. There are 
4 to 18 pinkish flowers arranged in a terminal umbel of 4 dm. 
length, and in addition to these the inflorescense contains about 
a dozen ovoid bulblets. The perianth-leaves are 7 mm. long, 
and they spread sufficiently to give the flower a diameter of 12 
to 15 mm. In the middle of each of these pinkish leaves, espe- 
cially on those of the inner row, a light violet line, the so-called 
nectar-guide, points towards the middle of the flower. Nectar 
appears near the base of the ovary in the septal furrows and accu- 
mulates between the latter and the bases of the inner filaments. 
The flowers have a faint sweet scent. 
Proterandry is well marked. In the first or male stage the 
anthers dehisce one after the other, and the style has at the begin- 
ning of this stage a length of only 15^2 mm. with scarcely a trace 
of a stigma. The introrse anthers gradually become extrorse. In 
the second or female stage the style attains its entire length 
of 4 mm., and the stigma reaches maturity after all of the anthers 
are empty, rarely before. The stigma surpasses the anthers. The 
style assumes a pink color and the stamens also (with the excep- 
tion of the light-yellow pollen) agree in color with the perianth. 
Numerous insects pay their attention to the flowers, and cross- 
pollination is insured through the high degree of proterandry. 
Visitors were taken as follows : 
A. Hymenoptera 
. Apidae: (i) Clisodon tcrminalis Cr. female, c. p.; (2) Alci- 
damea producta Cr. female, s. ; (3) Andronicus cylindricus Cr. 
male, s. : (4) Osmia piimila Cr. female, s. ; (5) Stelis 6-maculata 
Ashm. female, s. ; (6) S. suhemarginata Cr. female, s. ; (8) 
Coelioxys moesta Cr. female, s. ; (9) Calliopsis andreniformis Sm. 
