236 BOTANICAL GAZETTE [APRIL 
Centralb. 61: 263).—(15) MacLeod, Bevruchting der bloemen van Viaan- 
deren. Bot. Jaarboek 6: 256, 437. 1894. C. sanguinea, Mas.—(16) Loew, 
Bliitenbiologische Floristik 248. 1894. C. sanguinea, Mas. 
VIBURNUM PUBESCENS Pursh.—The mode of pollination of this 
species, along with a general account of the genus and an index 
to the literature, has been given in Trans. Acad. Sci. St. Louis 
7:170-2. The list of visitors recorded there, indicating a pre- 
ponderance of beetles, is fragmentary and quite misleading. 
Beetles are more abundant on the old flowers, of which they 
eat all parts. The most frequent and efficient pollinators ate 
the less specialized bees, and flies. The blooming season is May 
2-25. The following list, observed on May 4, 5,7 and 9, includes 
visitors previously mentioned. It shows an interesting asset 
blage of Empididae, a family of flies which reaches its maximua 
in May. 
Bees — Apidae: (1) Bombus americanorum F. 9, s.; (2) B. sepa — 
% 8. ; (3) Synhalonia frater Cr. ¢, s. : (4) Ceratina dupla Say 2, s. & © P-) (5) 
Osmia albiventris Cr. ¢, s. ; Andrenidae: (6) Halictus pectoralis Sm. 3,5 4 
C. p., freq. ; (7) H. foxii Rob. ?, S.& Cc. p. ; (8) H. 4-maculatus Rob. 3, 5; (9) #- 
coriaceus Sm. 9, s.; (10) H.cressonii Rob. 9, s.& Cc. p.; (11) H. confusus S®- 
%, 8. & C. p. ; (12) Augochlora confusa Rob. 9, s. & c. p. ; (13) Andrena vicina 
Sm. % s. & ¢, P-; (14) A. sayi Rob. 9, s. & c. p., freq.; (15) A, robe 
D.T. % 8. & c. p., freq. ; (16) A. mandibularis Rob. 9, 8. & ¢. P» frei 
Rob. 3,5. & c. p., ab. ; (24) Prosopis affinis Sm. 4, s.; (25) P,m 
8.; (26) P. pygmaea Cr. 9, s, 
2) Mer 
ey - (49) Siphopey” 
pipiens L.; Tachinidae : (48) Siphona illinoensis Twns., freq. ’ (49) 5) chloe 
floridensis Twns.; Muscidae: (50, 51) Lucilia spp. ; Oscinidae : (5 : 
Proxima Say ; (53) Hippelates plebejus Lw.—all s. 1, L. freq: (33) 
Coleoptera — Dermestidae - (54) Anthrenus musaeorum ©" — 
