1892. ] Flowers and Insects. 177 
phous Papilionaceae, the bee inserts its proboscis between the 
upper filaments. The filaments are somewhat unequal in 
length. The anthers dehisce in succession, so that to remove 
all of the pollen, bees must visit each flower several times. 
The stigma is situated among the anthers, and I find nothing 
to prevent self-pollination. The flower has more accessible 
nectar than in B. leucantha, but on account of its early 
blooming, it has less need of adaptation to exclude shorter 
tongues, since it is mostly exposed to Bombus females and 
species of Synhalonia. 
Osmia latitarsis was the only bee visiting it for both honey 
and pollen, and there may be an important relation between 
the flower and the bee, which are both equally rare. I have 
: yet taken the female of this Osmia only on the present 
ower 
The following list of visitors was observed on May 16 and 19: 
‘Apidae: (1) Bombus separatus Cr. 9, s.; (2) B. american- 
frum F. 9, s.; (3) Synhalonia speciosa Cr. 2, s.; (4) Osmia 
latitarsis (r.8.s& c. p. 
TRIFOLIUM PRATENSE L.—( ‘Adv. from Eu.” )—I have 
“aby much interested in observing how frequently this well- 
town bumble-bee flower is visited by Lepidoptera. It is a 
een thing for bee-flowers to be visited to some extent by 
utter-flies, but this seems to me to be an unusual case. In Ger- 
Pid Miller found it visited by 8 Lepidoptera in a list of 39 
ee while in Illinois I have found it visited by 13 species 
Bel 20, Our flowers are exposed toa richer butterfly- 
butterfli we may expect to find a larger proportion of 
butt ay upon them, and the differences between bee and 
4 .¥-flowers may not be so well indicated in the lists of 
tint, While butterflies may sometimes effect cross-fertiliza- 
jurio the red clover, they are of doubtful value, if not in- 
us. Bumble-bees depress the keel so that their heads 
can insert thus ee Well dusted with pollen. But athe 
even if th their thin tongues without depressing the keel, and, 
apt to 5 £Y get a little pollen on their thin proboscides, it is 
Petals, Tet gay off by the closely approximated tips of the 
I ive a Close the mouth of the flower. 
days, y Cund it in bloom from April 26 to Nov. 4. On 15 
» May 10 to Sept. 11, I noted as visitors: 
