Graenicher—Andrenine Bees and Entomophilous Flora. 91 
Name of Species. 
Time of Flight. 
1. Andrena cockerelli, Graen .. 
Mar. 31—May 4 
2. Andrena illinoensis, Rob ... 
Apr. 6—May 7 
3. Andrena radiatula, Ckll_ 
Apr. 8—June 16 
4. Andrena bipunctata. Cress.. 
Apr. 8—June 17 
5. Andrena mariae, Rob. 
Apr. 9—June 6 
6. Andrena erythrogastra, 
Apr. 17—June 6 
Ashiu. 
7. Andrena carlini, Ckll. 
Apr. 18—June 10 
8. Andrena vicina, Sm. 
Apr. 20—June 15 
9. Andrena hippotes, Rob. 
Apr. 25—June-26 
10. Andrena cressonii, Rob. 
Apr. 28—June 28 
11. Andrena dubia, Rob. 
Apr. 28—May 21 
12. Andrena erigeniae, Rob. 
Apr. 28—May 7 
13. Andrena dunningi, Ckll_ 
Apr. 30—May 12 
14. Andrena macgillivrayi. 
May 2—May 7 
Ckll. 
15. Andrena milwaukeensis, 
May 4—June 26 
Graen. 
16. Par andrena andrenoides, 
May 8—May 28 
Cress. 
17. Andrena rugosa, Rob. 
May 9—June 12 
18. Andrena hartfordensis, Ckll. 
May 9—June 2 
19 -A-TicIvptici nivalis Sm 
Mav 9 .InnA 97 
20. Andrena forbesii. Rob. 
C/ U UUu U I 
May 9—June 26 
21. Andrena claytonice, Rob. 
May 10—May 14 
22. Andrena fragariana, Graen. 
May 15—June 15 
23. Andrena platyparia, Rob .. 
May 16—July 4 
24. Andrena ziziae, Rob. 
May 18—June 26 
25. Andrena geranii, Rob. 
May 18—July 1 
26. Andrena rufosignata, Ckll.. 
May 19 
27. Andrena geranii maculati, 
May 20—June 25 
Rob. 
28. Andrena sigmundi, Ckll_ 
May 26—June 6 
29. Andrena subcommoda, Ckll 
May 27—July 3 
30. Andrena corni, Rob. 
May 27—July 9 
31. Andrenamultiplicata, Ckll.. 
May 29—July 30 
32. Andrena thaspii, Graen. 
May 29—June 23 
Flowers Visited for Pollen. 
Oligotropic, Salix. 
Oligotropic, Salix. 
Species of Salix and Thaspium. 
Species of Salix, Primus, Clayto- 
nia, Cornus , Crataegus, Vi¬ 
burnum, Angelica, Symphori- 
carpos, etc. 
Oligotropic, Salix. 
Oligotropic, Salix. 
Species of Salix, Claytonia and 
Crataegus . 
Species of Salix, Sanguinaria 
Erythronium, Caltha, Ribes 
Rosa, etc. 
Species of Salix, Pru»us, Vibur 
num, Angelica. Sniraea, Ce 
lastrus, etc. 
Species of Acer, Salix, Claytonia 
Cornus , Vagnera, Hydrophyl 
lum, Geranium, etc. 
This species is known in the male 
sex only. 
Oligotropic, Claytonia Virginica. 
Species of Caltha and Lonicera. 
Species of Salix. 
Species of Claytonia, Ribes, Strep- 
topus, Symp?wricarpos, 1 Angeli¬ 
ca, Spiraea, Celastrus, Diervilla, 
etc. 
Oligotropic, Salix. 
Species of Salix, Taraxacum and 
Rubus. 
Species of Taraxacum, Vagnera 
Thaspium, Angelico, Viburnum 
Symphoricarpos, etc. 
Species of Ribes, Vagnera, Thas 
pium, Heracleum, Cornus, Ru 
bus, Geranium, etc. 
Species of Salix, Taraxacum, Vi 
burnum. Geranium, Crataegus 
Cornv s, Thaspium, Sanicula,etc 
Claytonia Virginica. 
Oligotropic, Fragaria Virginiana. 
Species of Salix, Thaspium, An¬ 
gelica, Cornus, Viburnum,Rhus, 
etc. 
Oligotropic, Umbelliferae. 
Oligotropic, Hydrophyllum. 
Uvularia grandiflora. 
Oligotropic, Geranium macula- 
tum. 
Species of Vagnera and Crataegus. 
Species of Thaspium, Viburnum, 
Crataegus, Symphoricarpos, 
Rosa, Spiraea, Rhus, etc. 
Species of Viburnum, Sanicula, 
Angelica, Cornus, Rubus,Rhus, 
Rosa, etc. 
Species of Thaspium, Cornus, 
Spiraea, Symphoricarpos, 
Rhus, Ceanothus, Veronica, etc. 
Oligoitropic, Umbelliferae. 
