1909] Graenicher, Wisconsin Flowers and Their Pollination. 63 



ALLOTEOPOUS. 

 Wasp: 141, s. 



Flies: 267; 345 ; . 346 ; 355; 36.0; 369.; 373; 376; 381; 383; 387; 

 395 ; 418 ; 422 ; 428 ; 437 — all s. or c. p. 

 Beetles: 510; 517— both s. 

 Bugs: 543; 551— both s. 



Eutrop 3 = 4 - 6 % 



Hemitrop 42 = 63.6% 



Allotrop 21 = 31.8% 



Heliopsis Pers. 

 2i. Heliopsis scabra Dunal. Bough Ox-eye. 



Blooming from around June 30 to August 13. The heads are 

 about 5 cm. in diameter, and have the rays, as well as the disk 

 florets yellow. In color, and general appearance they resemble the 

 sunflowers but come about 3 weeks ahead of Helianthus strumosus, 

 and H. tracheliifolius, our earlies species of sunflowers. The dis- 

 cal floret has a tube of equal width throughout (1 mm.), and of 

 5 mm. length with erect corollar lobes. Nectar rises in the tube 

 to a certain extent, and for this reason it may be accessible to an 

 insect whose tongue is shorter than 5 mm., as for example .P/^/m- 

 ria punctipennis. and Eusiphona mira, two small flies which are 

 regular visitors to Heliopsis scabra, and to other composite flowers 

 of a similar type. 



The following 42 visitors were observed. 



EUTEOPOUS. 



Bees : 1, worker, s. and c. p. ; 9, female, s. and c. p. ; 17, male and 

 female, s. and c. p. ; 20, male, s. ; 27, male and female, s. ; 28, male, s. ; 

 31, male, s. ; 33', male and female, s. and c. p. ; 34, male and female, 

 s. and c. p. ; 35, male and female, s. and c. p. ; 36, female, s. and c. p. ; 

 46, male and female, s. and c. p. 



HEMITEOPOUS. 



Bees : 87, female, s. and c. p. ; 96, female, s. and c. p. ; 99, female. 

 s. and c. p. ; 100, female, s. and c. p. ; 102, male and female, s. and 

 c. p.; 113, female, s. and e. p. 



Flies: 272; 280; 281; 307; 308; 319— all s. or f. p. 



Butterflies and moths: 451; 454; 459; 460; 464; 469; 480; 497— 

 all s. 



ALLOTEOPOUS. 

 Wasp: 163, s. • 



Flies: 352 ; 369 ; 397 ; 442— all s. or f. p. 

 Beetles: 513; 534— both f. p. 

 Bugs: 550; 557; 559— all s. 



