1909] Graenicher, Wisconsin Flowers and Their Pollination. 7<. 



ALLOTROPOUS. 



Wasps: 173; 180; 181; 194— all s. 



Flies: 346; 354; 358; 365; 367; 369; 372; 373; 377; 379; 383; 



384 ; 395 ; 400 ; 401 ; 408 ; 413 ; 415 ; 442— all s. or f. p. 



Beetles: 507; 510; 512— all s. or f. p. 



Bugs : 543 ; 553 ; 554 ; 555 ; 559 — all s. 



Eutrop 2 = 3.2% 



Hemitrop 31 = 48.4% 



Allotrop 31 = 48.4% 



Chrysanthemum (Tourn.) L. 

 30. Chrysanthemum Leucanthemum L. Ox-eye Daisy. 



We have here another example of a foreign (European) plant, 

 which has gained a strong foothold in our flora. The flowers have 

 been found from June 20 to November 5. Hermann Mueller 33 

 and several other European authors have given a detailed account 

 of the mode of pollination of this species, and its relation to in- 

 sects. The head measures 40 mm. in diameter, 16 mm. of which 

 are taken up by the yellow disk. The broad white rays with a 

 length of 12 mm. render the head very conspicuous. The dimen- 

 sions of the cup of the tubal floret are 1 mm. length, and nearly 

 1 mm. width. A rather faint sweetish odor is present in these 

 flowers. 



61 visitors : 



EUTROPOUS. 



Bees : 1, worker, s. and c. p. ; 17, female, s. and c. p. ; 35, male 

 and female, s. and e. p. 



HEMITROPOUS. 



Bees : 102, female, s. ; 104, male, s. ; 105, female, s. and c. p. ; 112, 

 female, s. and c. p.; 118, female, s. and c. p.; 122, female, s. and c. p.; 

 123, female, s. ; 128, male, s. ; 134, female, c. p.; 136, female, s. 



Wasps : 151, 155 — both s. 



Flies : 288 ; 298 ; 300 ; 306 ; 307 ; 308 ; 313 ; 316 ; 319 ; 322 ; 332 ; 343 ; 

 344 — all s. or f. p. 



ALLOTROPOUS. 



Flies : 256 ; 259 ; 266 ; 268 ; 349 ; 350 ; 354 ; 361 ; 369 ; 373 ; 377 ; 384 ; 



385 ; 391 ; 395 ; 396 ; 413 ; 415 ; 416 ; 426 ; 438 — all s. or f. p. 



Beetles: 511; 519; 527— all s. or f. p. 



Bugs : 544 ; 545 ; 54S : 553 ; 554 ; 559 ; 560 ; 561 ; 562— all s. 



Eutrop 3 = 4.9% 



Hemitrop 25 = 41.0% 



Allotrop 33 = 54.1% 



33) H. Mueller, loc. cit. pp. 394-395. 



