JAN. 1907. 
WISCONSIN FLOWERS AND THEIR POLLINATION. 
36 
Lep. female, c. p. ; (6) H. zephyrus Sm. female, c. p. ; (7) H. albi- 
pcnnis Rob. female, c. p.: (8) Sphecodes clematidis Rob. female, 
searching for nectar. 
B. Diptera 
Stratiomyidse : (9) Stratiomyia lativentris Lw. ; Bombyliidse: 
( 10 ) Bombylius atriceps Lw. ; Syrphidse : ( 1 1 ) Meso gramma gem- 
iiiata Say ; Tachinidse : (12) Peleteria iessellata Fabr. ; (13) 
Archytas anal is Fabr.; Sarcophagidse : (14) Sarcophaga sp. ; 
Dexiidse: (15) Myocera cremides Walk.; Muscidse: (16) Lucilia 
syk arum Meig. : (17) L. sericata Meig. ; Anthomyidse: (18) 
Phorbia sp. ; (19) Drymeia sp. — all except (10) f. p., (10) prob- 
ing around the base of the ovary for nectar. 
D. Coleoptera 
Elateridse: (20) Agriotes oblongicoUis Mels. ; Scarabseidae : 
(21) Trichhis piger Fabr.; Cerambycidse : (22) Cyrtophorus ver- 
rucosus 0\iv.; (23) Acmwops biviftata Say; Anthicidse : (24) 
Corphyra coUaris Sav ; Meloidse: (25 ) Macrobasis unicolor Kirby 
—all f. p. 
D. Hemiptera. 
CapsidcT : (26) Calocoris rapidiis Say; (27) Poecilocapsus 
liiieaius Fabr. (28) P. goniphorus Say — all resting on the flowers. 
Vagnera stellata (L.) Morong. Star-flowered Solomon's Seal. 
This common species blooms aroimd Milwaukee from about 
May 13 to June 8 and the flowers are abundantly visited by bees as 
well as flies. Robertson (18) speaks of an adaptation to the less 
specialized bees — Andrcnidw, but my observations show that they 
are equally v/ell adapted to the specialized flies of the family 
Syrphidce, over one-half of the visitors belonging to the Andrenidw 
and Syphidw, taken together. This is what might be expected 
when we consider the structure of the flowers. They are pure 
white with the exception of the light yellow anthers and are 
arranged in a terminal raceme. The diameter of a flower is about 
12 mm. The leaves of the perianth are spread so as to form 
nearly a right angle with the axis of the flower, and the stamens 
take up an intermediate position between the perianth-segments 
and the pistil, whereby the anthers are kept at a distance from the 
18. Chas. Eobertson. Loc. cit., pp. 269-270. 
