i ULY & 
32 BOTANICAL GAZETTE [J | 
those in the neighborhood of the Hibiscus. Thus a | 
single female sucking the nectar of Cephalanthus a 1S, : _ 
another that of Vernonia fasciculata, as wellas a single male suck _ 
ee aa 
ing nectar of /pomewa pandurata. The outside visits in no y 
| ibiscus. For 
modify the essential relation of the bee to the Hibiscus 
s ok li- 
myself, I do not believe in the absolutely exclusive visits of oli 
hy 
gotropic bees to their pollen flowers, and I see ng <a "d | 
they should be expected. If the plants from which a bee g 
ay ion of 
pollen are common and widely distributed, the a 
flowers to which it occasionally resorts is much ae alll 
case like Hibiscus, Indeed, it strikes me that it is an adva 
me owels — 
for the males and unimpregnated females to visit other a 
and not interfere with the females which are collecting p 
: llen 
Some bees which stick their pollen with honey get a io 
from nectarless flowers, and so are compelled to visit other 
; 's, with pollen 
ers for nectar. I have seen Macropis steironematis, with p 
balls on her legs, sucking nectar of Melilotus alba. 
. : ts e 
_In case of this Macropis and Steironema, Kerner might sa 
the bee perceived or liked yellow flowers, but all of the ae 
visits I have seen this bee make were to white flowers, Ceanot 
Melilotus alba, Apocynum. 
bloom in the neighborhood. 
. alle 
I shall now give the cases of oligotropic bees mentioned ? 
: é rity of 
Lubbock,* on authority of Miller ; by Loew, on authority P 
Schmiedeknecht ; and by Knuth® from various sources. 
Andrena florea _ Visits exclusively Bryonia dioica. i 
hattorfiana = « " Scabiosa ( Knautia ) arvens® : 
Halictoides “ “ Campanula spp. 
Cilissa melanura “ as Lythrum Salicaria. : 
Macropis labiata " a Lysimachia vulgaris. . 
Osmia adunca . “ Echium. 7 
‘British Wild Flowers in Relation to Insects 21. 1875. 
’Blumenbestch von Insekten an Freilandpflanzen. Jahrb. Bot. Gartens 
3:274 (72). 1884 
° Handbuch der Bliitenbiologie I:114. 1898, 
: in 
In these cases Steironema was 
ee eee A 
