1898] FLOWERS AND INSECTS 233 
absence spontaneous self-pollination or geitonogamy may some- 
times occur by the pollen falling upon the stigmas. In Cornus 
ad Viburnum the elongation and strong divergence of the 
samens is no kind of an ‘arrangement for geitonogamy,” 
though it may result in that, but merely places the anthers in 
position to strike insects which run about irregularly over the 
flowers, 
The flowers were noted in bloom from April 22 to May 8. 
Inthis time very few of the lower aculeate Hymenoptera are 
fying. The following list, observed on April 23, showing a 
strong preponderance of Andrenidae, with flies less abundant, is 
about what might be expected from the structure of the flowers 
and the composition of the insect-fauna at the blooming time : 
Hymenoptera — Apidae : (1) Bombus separatus Cr. 9, S., one; (2) Osmia 
ibiventris Cr. ¢, s. & c. p., one; (3) Nomada sayi Rob. 4, s.; Andrenidae : 
(4) Halictus foxii Rob. 9, s. & c. p.; (5) H. coriaceus Sm. %, S. ; (6) H. fasci- 
Nyl. 9, s. & c. p., freq.; (7) H. pilosus Sm. 2, Ss. & C. P-; (8) H. zephyrus 
et Ems ididae : (21) Empis humilis Coq., freq. ; Bombylidae : (22) 
| 0 Lw.; (23) B. major L.; Syrphidae: (24) ont 
Wi; me hans daa marginata Say; (26) Criorhina umbrati ne 
Lepidopters apes Lonchaea polita Say — alls. 
Coleoptera — C epalocera - (28) Nisoniades juvenalis re a 
erambycidae : (29) Molorchus bimaculatus Say, s. « p 
— PANICULATA L’Her.— C. candidissima Marsh.— a his 
is « — of floral types Delpino (3) places this species 1D 
a idrangeino,” which, as stated above, he regards as 
ea beetles. He considers the scent of the flowers, 
- Mt adapt lls “odore carabico o scarabeo,” as further indicating 
— Nisited 5 S B these insects. He saw the flowers abundantly 
The Y Cetonia aurata and other Coleoptera. 
shrubs are much branched, rise from 1 to 3" high and 
