46 Bulletin Wisconsin Natural History Society. [Vol. 7, Nos. 1-2. 



ALLOTROPOUS. 



Wasps: 137; 139; 141; 164; 165; 194— all s. 



Parasitic wasp : 238, s. 



Flies: 372; 377; 378; 385; 389; 400; 415; 416; 442; 443; 444— 

 all s. or f. p. 



Beetle: 533, f. p. 



Bugs : 546 ; 547 ; 554 — all s. 



Eutrop 14 = 16.3% 



Hemitrop 50 = 58.1% 



Allotrop 22 = 25.6% 



4. Aster macrophyllus L. Large-leaved Aster. 



The flowers of this species have been observed throughout a 

 rather extended blooming- period, from about July 24 to October 

 11. The heads are larger than in the preceding species, having a 

 width of 25 to 30 mm. In color the rays are rather variable, dif- 

 ferent shades between light violet and blue being noticeable. In 

 several heads the number of ray florets was found to be from 13 

 to 14, and of disk florets from 27 to 37. 



In color, gradual change of color, and structure the disk floret 

 agrees very closely with that of A. furcatus, the bell is of the 

 same length, and width as in that species, and the somewhat 

 longer corollar lobes are also spreading. In shape the bell in both 

 of these species resembles that of A. paniculatus, but in the latter 

 species it is shorter, and its yellow color is of a lighter hue. In 

 A. macrophyllus the stylar branches are just as slender, and as 

 long as in A. furcatus, and cross each other in the older flowers in 

 the same manner. 



The fragrant odor of the flowers is more noticeable in this 

 species than in any of the other species of Aster considered in this 

 paper, except A. novce-anglice. 



These flowers are very attractive to insects, of which the fol- 

 lowing 95 species have been taken : 



EUTROPOUS. 



Bees : 1, worker, s. ; 4, male and worker, s. ; 7, female, s. ; 10, 

 male, s. ; 16, male, s. ; 17. female, s. ; 20, female, s. and c. p. ; 29, male 

 and female, s. ; 31, female, s. ; 32. male, s. ; 35, male and female, s. and 

 c. p. ; 36, male, s. ; 39, male, s. ; 42, female, s. ; 44, female, s. ; 58, male 

 and female, s. 



HEMITROPOUS. 



Bees : 70, male and female, s. ; 72, male and female, s. ; 87, female, 

 «. and c. p. ; 89, male and female, s. and e. p. ; 102, male and female, s. 



