THE CANADIAN ENTOMOLOGIST 67 



and Minot; 26 females, June 25, July 1, 3, 4, 7, 14, 16, 18, 2o and 27 at flowers 

 of Brauneria pallida, Carduiis undulatus, Lactuca pulchella, Onagra strigosa, 

 Opuntia hnmifusa, Petalostemon purpurea, Rosa, Sisymbrium altissimum and 

 Taraxacum taraxacum; 5 males, Sept. 15, 20, and 25 at flowers of Aster chinensis, 

 A. paniculatus and Helianthus maximiliani. 



Agapostemon radiatus (Say). 



Fargo and Mandan; 14 females, May 14, 26, June 17, 26, Aug. 7, Sept. 8 

 at flowers of Dracocephalum parviflorum, Erigeron philadelphicus, Oxalis stricta, 

 Physalis ixiocarpa, Ribes missouriensis, Rosa, Salix, Symphoricarpos occi- 

 dentalis and Taraxacum taraxacum; 21 males, Aug. 7, 11, 13, 25, Sept. 6, 8, 11. 

 15, 18, 27 and Oct. 15, at flowers of Aster paniculatus, A. sagittif alius. Bidens 

 frondosa, B. vulgata, Grindelia squarrosa, Medicago saliva. Melilotus alba, Physalis 

 ixiocarpa and Physostegia parvi flora. 



Also females from Minneapolis, Minnesota, at Aquilegia (Nevada S. Evans), 

 Webster City, Iowa, on Syringa vulgaris (J. R. Campbell), and Blue Rapids, 

 Kansas, Oxalis stricta (Edna M. Stevens) ; a male from Blue Rapids at Helianthus 

 tuberosus. 



Agapostemon texanus (Cress.). 



Fargo, Venlo, Lisbon, Nicholson, Monango, Oakes, Kulm, Gascoyne, 

 Bowman, Valley City, Jamestown, Mandan, Glen Ullin, Mott, Dickinson, 

 Washburn, Pleasant Lake, Minot, Williston, and Schafer; 92 females. Apr. 29 

 May 5. 11, 13, 17, June 2, 4, 5, 14, 16, 26, 28, July 1, 3, 4, 7, 10. 11, 18, 21, 25, 

 26, 27, Aug. 9, 12, 13, 17, Sept. 5, 10, 17, Oct. 22 and 31; at flowers of Aster 

 chinensis, Brassica arvensis, Brauneria pallida, Cactus viviparus, Carduus undu- 

 lattcs, Centaur ea jacea, Cerastium arvense, Chrysopsis villosa, Dracocephalum 

 parviflorum, Erysimum asperum, Gaillardia aristata, Gaura coccinea, Grindelia 

 squarrosa, Helianthus annuus (cult.), H. petiolaris, Homalobus tenellus, Lactuca 

 pulchella, Malvastrum coccineum, Medicago falcata, M. saliva, Onagra strigosa, 

 Opuntia humifusa, Pentstemon albidus, P. gracilis, Prunus americana, Ratibida 

 columnar is, Ribes setosum, Rosa, Rudbeckia laciniata, Senecio perplexus, Spircea 

 salicifolia, Symphoricarpos occidentalis. Taraxacum taraxacum, and TrifoHum 

 repf'M^; 37 males Aug. 7, 11, 13, 14, 17, 18, 24, 25, 30, 31, Sept. 5, 6, 8, 10, 13, 15, 

 17, 19, 20, 21, 27, Oct. 1, 14, 22, 27 at flowers of Allionia hirsuta. Aster chinensis, 

 A. laevis, A. multiflorus, A. paniculatus, Boltonia asterioides, Centaitrea jacea, 

 Erucastrum polHchii, Grindelia squarrosa, Gutierrezia sarothrce, Helianthus 

 maximiliani, Physalis ixiocarpa, Physostegia parviflora and Sideranthus spinulosus. 



This is by far the most common species of the group in North Dakota and 

 one of the most common bees. The earliest Fargo record which I have is Apr. 

 29, 1913, (C. H. Waldron). The October records are all in 1915, but the past 

 year a male was seen Oct. 20, and both sexes quite abundant in the early part 

 of the month, the fall having been mild except for one heavy frost on Sept, 29. 



A single female from Ft. Douglas, Utah, (J. F. Brenckle, May 5, 1918, at 

 Balsamorrhiza sagittata) difTers somewhat in the sculpture of the propodeum. 

 It has a fairly distinct enclosure, from which run laterally about a dozen promi- 

 nent ridges, converging slightly on the angle. 



I have also 6 females from Denver, Colo.. 3 at Cleome serrulala and 1 at 

 Sisymbrium altissimum (Edna M. Stevens, July 5, 1915). Two of these and 



