Flowers and insects. XY.! 
CHARLES ROBERTSON. 
POLYGONUM Tourn.—For the present I withhold the © 
consideration of the mode of pollination and of the copious 
special literature and contribute lists of insect visitors of the 
two following species. 
POLYGONUM PENNSYLVANICUM L.—The visitors observed 
on nine days between Aug. 8th and Sept. 16th, are as fol- 
lows: 
YMENOPTERA—Afi ide: (1) Apis mellifica L. 8, ab.; (2) Bombus sep: 
aratus Cr. 6; (3) B. americanorum F. 4y; P Ms inicus Oliv. sy, ab. | 
(5) Megachile brevis Say 6; Aeleeniia: (6) Andrena mre Rob. 33() 
Agapostemon radiatus Say 8; (8) Augochtora viridula Sm. ¢; (9) A 
Ee Say 9; (10) Halictus fasciatus Nyl. 9; (11) H. pilos oh Sm. 9; (13) 
confusus Sm. % (13) H. stultus a F EC ores (14) Polistes Le 
ephus ribesii L as rericanus Wd., fre (34) Ktesogran 
polita M ta Say; (36) Srictalis. tenax L.; (37) & 
eus F.; (38) Tropidia quadrata Soe: (39) Syritta pipiens L.; £4 sil 
ide: (40) Cis ter Immaculata Mcq.; (41) Jurinia smaragdina Mcq, 
ab.; (42) J. apicifera WIk.; ; (43) Micropalpus fulgens Frowss 
acitatiec 45) F. flavicauda Rile y; (46) Atr ophopoda me 
ns.; Sarconke pies: (47, 48) Se aohac spp.; Mus : (49) 
raphanayis sp., freq.; (50) iis caesar L.; (51) L. Pe ee + ; (52) 
Liiboreei — Rhopalocera: (53) Pieris protodice B-L.; (54) 
rape L.; (55) Colias phtodice a: 63) } Ehevisphaaas) thoe B.-L.; ($1 
Pamphila ce ernes B.-L.; nee: = Heliothis armiger Hiib.; | 
Scepsis fulvicollis Hiib.— 
on jcus 
DeGrs. hn RA Temiviane (60) Chauliognathus pennsylvan! 
Patseaere HYDROPIPEROIDES Michx.— The followi"é 
visitors were observed Aug. 30th and Sept. 20th: 
*Contributions to an account of the ecological lations of the entomophilovs 
flora og the anthophilous insect fauna 7 the neighnci thos of Carlinvill 
{72} 
