CHARLES ROBERTSON 47 
Philanth.: Cerceris compacta, rufinoda; Eumen.: Leionotus forami- 
natus, fulvipes. 
Diptera (34)—Taban.: Chrysops striatus; Nemestrin.: Rhyn- 
chocephalus; Bombyli.: Oncodocera, Toxophora; Syrph.: Allo- 
grapta, Eristalis aeneus, dimidiatus, tenax, transversus Mallota 
cimbiciformis, Mesogramma marginata, Orthoneura nitida, Paragus 
tibialis, Sphaerophoria, Syritta, Syrphus americanus, ribesii; 
Conop.: Conops brachyrrhynchus, Oncomyia; Tachin.: Apinops, 
Archytas analis, Cistogaster occidua, pallasii, Epigrimyia polita, 
Gymnosoma, Senotainia rubriventris, trilineata; Sarcophag.: Heli- 
cobia helicis, Sarcophaga cimbicis ; Musc.: Lucilia sylvarum, Pseudo- 
pyrellia; Anthomy.: Phorbia acra, platura; Sapromyz.: Sapromyza 
vulgaris. 
Coleoptera (1)—Mordell.: Mordella melaena. 
Actinomeris alternifolia—Blooms August 15—October 4, 12 
visitors observed, August 17—September 12; Mas, Y. 
Long-tongued Bees (6)—Bomb.: Bombias separatus ¢, Bombus 
americanorum 9%, consimilis ¢ ¥, sc, impatiens ¥Y, se; Ap.: Apis se, 
fq; Epeol.: Triepeolus remigatus 9. 
Short-tongued Bees (2)—Halict.: Curtisapis coriacea ; 
Panurg.: Pseudopanurgus labrosiformis 9, c. 
Other Hymenoptera (1)—Scoli.: Seolia bicincta. 
Diptera (1)—Syrph.: Syrphus ribesii. _ 
Lepidoptera (1)—Lycaen.: Cyaniris. 
Coleoptera (1)—Lampyr.: Chauliognathus pennsylvanicus, in 
cop. 
Ambrosia trifida (anemophilous).—Two species and 33 individ- 
uals observed, August 27, September 1. 
Long-tongued Bees (1: 31)—Ap.: Apis ¢, 31. 
Other Hymenoptera (1: 2)—Vesp.: Vespula germanica, expl., 2. 
Antennaria plantaginifolia (15: 462-—3)—Blooms April 4~May 
21; 72 visitors observed, April 14~May 5; Mis, W. 
On staminate flowers (25): 
Long-tongued Bees (3)—Megachil.: Osmia pumila ¢; Bomb.: 
Bombus americanorum 9; Nomad.: Nomada cressonii ¢. 
Short-tongued Bees (2, 9)—Halict.: Evylaeus foxii se ; Spheco- 
dini: Dialonia antennariae type. 
Diptera (14)—Empid.: Empis otiosa type; Syrph.: Eristalis 
aeneus, Mesogramma geminata, Orthoneura nitida, Paragus tibialis, 
Platychirus hyperboreus, quadratus; Tachin.: Pachyophthalmus 
signatus; Sarcophag.: Cynomyia, Helicobia helicis, Sarcophaga 
