J . > / 
3] . Flowers and Insects. 269 
_ Diptera—Syrphzdae : (21) Mesograpta marginata Say, s. and 
f.p.; Muscidae: (22) Lucilia cornicina F., s.; Anthomyidae: 
_ (23) Chortophila sp., s., freq. : 
Lepidoptera—Rhopalocera: (24) Pieris rape L., s. 
Coleoptera—Malachidae: (25) Collops 4-maculatus F., f.p. 
Halic- | Other | Other 
tus. bees insects. Total. 
In the Pyrenees—MacLeod.............. - I x . 
ln Low Germany—Miiller.............. 2 3 1 : 
ME gets i 13 7 5 ” 
ae 
SIDA SPINOSA L.—‘‘Nat. from the tropics.”—-The stigmas 
receiv pollen from the dehiscent anthers, but may be effect- 
ually dusted with pollen from other flowers in case of early 
lasect visits. Later the styles bend and turn the stigmas in 
tig the anthers, so that thorough self-pollination is in- 
nag The plant has small yellow flowers. It was noted in 
a. tom July 25th to October 3d, and the following visit- 
ere observed:— 
a: 3) Conta Apidae: (1) Bombus americanorum F. 2%, 
(2) Ceratina dupla Say 9, s. and c. p.; Andrenid@: (3) 
; M4 ” 
The “ley AVICENN A Gertn.—‘‘Adv. from > india, = 
tions un i are yellow and occupy very inconspicuous Pposi- 
pollinate cc large leaves, They are spontaneously isd 
i nce. of in -pollinate 
m their presence sects, but may be cross-po 
*anting and that For a long time I thought that nectar was 
August aa at visitors never occurred, but in three days, 
Sects © September 19th, I captured the following in- 
on the flow eee ’ 
“a y Menoptera— 
