72 Bulletin Wisconsin Natural History Society. [Vol. 7. Xos. 1-2. 



Tanacetum L. 

 31. Tanacetum vulgare L. Tansy. 



A European species which occurs in several places around Mil- 

 waukee growing in patches, and which has been noticed in bloom 

 from August 3 to September 18. We have received much infor- 

 mation regarding the pollination of these flowers from H Muel- 

 ler 34 , and others. In the flat inflorescence the small yellow heads 

 are crowded in the same manner as in Achillea. The upper part 

 of the tube with its short erect corollar lobes is small, hardly more 

 than 2 /$ mm. wide, and about 1 mm. deep. The scent of the 

 flowers is strong, and rather disagreeable, and visitors are not 

 abundant on the flowers growing in our surroundings. 



The following 34 were observed : 



EUTEOPOUS. 



Bees: 1. worker, s. ; 7, male, s. ; 35, female, s. and c. p. 



-HEMITKOPOUS. 



Bees: 104, male, s. ; 114. male, s. 



Flies: 290. 306; 308; 315; 316; 330; 332— all s. or f. p. 



Butterflies and moths : 451 ; 480 ; 481 ; 491 — all s. 



ALLOTROPOUS. 



Wasp: 137, s. 



Parasitic wasp : 226, s. 



Flies: 356; 360; 369; 371; 372; 373; 374; 377; 379; 381; 391; 

 395 — all s. or f. p. 



Beetles : 527 ; 528 — both s. and f. p. 



Bugs : 553 ; 554— both s. 



Eutrop 3 = 8.8% 



Hemitrop 13 =z 38.2% 



Allotrop 18 = 53.0% 



Cacalia I.. 

 32. Cacalia reniformis Muhl. Great Indian Plantain. 



In our surroundings these flowers bloom from about July 2 

 to September 6. The heads, each containing 5 white fragrant 

 tubular florets are gathered in large flat inflorescences. The bell 

 of the tube is 2 mm. deep, its corollar lobes are spreading, and 

 even strongly reflexed in the later stage. In the older flowers the 

 branches of the style curl backwards. 



50 visitors were taken. 



34) H. Mueller, loc cit, p. 397-398. 



