1925] Habits of the Hibiscus Bee, Emphor bombiformis 281 
pale. How can one tell that the characters of E. bombiformis are 
shown by one specimen or that Grossbeck’s observations were 
on E. fuscojubatus ? 
Historically the relations of flowers and insects was a botan- 
ical subject as shown by the works of Sprengel, Darwin, Delpino, 
Mueller, Mac Leod and others. Most of the papers and abstracts 
are in botanical journals, a fact which indicates the place to look 
for the literature. 
Dependence of E. bombiformis on pollen of H. lasiocarpus, 
and adaptation of scopa to large pollen grains was recorded in 1, 
1888 (see also 2 and 4); habit of male of flying about flowers in 
search of the female, in 1, 1888, and 2, 1890; female carrying 
water to soften ground, in 2, 1890 (also in 4 and 9); phenological 
correlation with H. lasiocarpus and habit of nesting near it, in 4, 
1899. 
Chronological Bibliography. 
1. 1888. 
2; 1890 
3. 1893. 
4. 1899. 
5. 1905. 
6. 1911. 
7. 1911. 
8. 1913. 
9. 1918. 
Robertson, C. Zygomorphy and its causes. I-IXI. 
Bot. Gaz. 13: 146-51, 203-8, 224-30. 
Habits of Emphor bombiformis. Proc. Ent. Club 
A. A. A. S. Can. . Ent. 22: 216-17. Abstract by 
James Fletcher? 
Hibiscus lasiocarpus. Flowers and insects. XI. 
Bot. Gaz. 18: 270-1. 
On the flower visits of oligotropic bees. Flowers 
and insects. XIX. Bot. Gaz. 28: 27-38. 
Knuth, P. Handbuch der Bliitenbiologie. 3 2 : 417. 
Grossbeck, J. A. A contribution toward the life 
history of Emphor bombiformis. Journ. New 
York Ent. Soc. 10: 238-43. 
Knab, F. How Emphor drinks. Proc. Ent. Soc. 
Wash. 13: 170. 
Nichols, M. L. Some observations on the nesting 
habits of the mining bee, Emphor fuscojubatus. 
Psyche 20: 107-12. 
Robertson, C. How Emphor drinks. Can. Ent. 
50: 320. 
