JAN. 1907. WISCONSIN FLOWERS AND THEIR POLLINATION. 
21 
B. Diptera 
Bombyliidse : (4) Anthrax siniiosa Wied. ; Syrphidse: (5) 
Syrphus americanus Wied.; (6) AUograpta obliqua Say; (7) 
M eso gramma mar ginaf a Say; Tachinidse: (8) Bxorista nigri- 
palpis Town.; (9) Archytas analis Fabr. ; Sarcophagidse : (10) 
Sarcophaga hclicis Town.; Muscidae : (11) Lucilia sylvarum 
Meig. ; ( 12) L. sericata Meig. ; — all s. or f. p. 
C. Lepidoptera 
Rhopaloceia: (13) Pontia rapa) L. ; (14) Phyciodes tharos 
Dru. — all s. 
D. Coleoptera 
Mordellidge: (15) Mordellistena comata Lec. s. 
This list is similar to that obtained by H. Mueller (4) for 
ToRcldia caiyciilata Wahlenberg in the Alps, viz: i bee, 6 flies, 
3 beetles, 3 butterflies and i ant. As regards the latter insect it is 
interesting to note that in our species of Tofieldia the viscid glands 
along the stem do not prevent the ants from reaching the flowers, 
although such arrangements are generally supposed to protect the 
flowers from these and similar intruders. Two species of ants 
formica fuse a L. var. suhsericca (Say) Emery and Cremastogas- 
fer Uneolata (Say) Emery were seen crawling on the flowers, and 
feeding on nectar. 
Uvularia grandiflora J- E. Smith. Larg-e-flowered Bellwort. 
The blooming period extends from May 5 to June 5. Robert- 
son (5) has made us acquainted with the mode of pollination of 
this species in southern Illinois, and little is to be added from 
observations on flowers of our region. The one or two pendulous 
flowers have a length of 4 cm. In the newly opened ones the 
twisted perianth-leaves are close together and only bees of large 
size (bumble-bees) are able to force their way in, but later on • 
especially in warm weather, the flower through the loosening of 
4. Henn. Mueller. Alpenblumen pp. 39-40. See also P. Knuth. 
Handbuch der Bluetenbiolog-ie. Vol. II, p. 516. 
5. Chas. Eobertson. Flowers and insects. XVI. Bot. Gaz. Vol. 
XXT. pp. 270-271. (1896). 
