92 Bulletin Wisconsin Natural History Society. [Vol. 8, No. 2. 



and blue flowers ; but the evidence furnished by the visits 

 of the following o more or less common species of bee-flies does 

 not agree at all with the theory in question. 



1. Anthrax alternata Say. 



Flowers visited: Solidago juncea. 2 Yellow. 



Solidago canadensis. Yellow. 



Anthemis Cotula. White. 



Arctium Lappa. Purple. 



Parnassia caroliniana. White. 



Rhus glabra. Yellowish. 



Verbena hastata. Blue. 



Angelica atropurpurea. White. 



Pastinaca sativa. Yellow. 



Skim eicattrfolium. White. 



Oxypolis rigidior. White. 



Cicuta maculata. White. 

 Altogether for the 12 flowers: 



White and yellow 83.3% 



lied, purple and blue 16.7% 



2. Anthrax halcyon Say. 



Flowers visited :■ Aster puniceus. Blue. 



Eupatorium perfoliatum. White. 



Eupatorium purpureum. Purple. 



Solidago juncea. Yellow. 



Solidago canadensis. Yellow. 



SoUdago graminifolia. Yellow. 



Rudbeckia laciniata. Yellow. 



Hclianthus stnnnosus. Yellow. 



Helen ium autuninale. Yellow. 

 Alltogether for the 9 flowers : 



White and yellow 77.8%. 



Red, purple and blue 22.2%. 



3. Bombylius fulvibasis Macq. (atrieeps Loew). 

 Flowers visited : Allium canadensc. Reddish. 



Smilacina racemosa. White. 

 Viburnum dentatum. White. 

 Stellaria longipes. White. 



2) Nomenclature according to Gray's ManuaL of Botany, 7th edit. (1908) 



