88 FLOWERS AND INSECTS—XXVI 
Short-tongued Bees (6:44)—AHalict.: Chloralictus pilosus 2, 
versatus 1, Evylaeus pectoralis 2, Odontalictus 36, Oxystoglossa 
similis 1; Panurg.: Pseudopanurgus rudbeckiae 2. 
Other Hymenoptera (2: 3)—Sphec.: Sphex nigricans 1; Humen.: 
Leionotus arvensis 2. 
Diptera (6:34)—Syrph.: Eristalis transversus 6; Bombylt.: 
Sparnopolius 3, Systoechus 1; Yachin.: Cistogaster occidua 1, 
Siphoplagia anomala 22; Musc.: Pseudopyrellia 1. 
Lepidoptera (2:7)—Nymphal.: Basilarchia archippus 1, 
Phyciodes 6. 
Coleoptera (2:43)—Lampyr.: Chauliognathus pennsylvanicus 
42; Epicauta pennsylvanica 1. 
Senecio aureus.—Blooms May 7—June 5; 18 visitors observed 
on May 15, June 2; Mis, Y. 
Long-tongued Bees (4)—Ceratin.: Ceratina ¢; Nomad.: Cen- 
trias americanus <, Holonomada superba ¢ 9, fq; Eucer.: Tetra- 
lonia dilecta 3, fq. 
Short-tongued Bees (5, 2)—Halict.: Chloralictus pilosus se, ab, 
pruinosus se, Odontalictus se, ab, Oxystoglossa confusa, se, similis. 
Other Hymenoptera (1)—KHumen.: Leionotus elypeatus. 
Diptera (8)—Syrph.: Eristalis latifrons, Mesogramma margi- 
nata, Sphaerophoria, Tropidia mamillata; Conop.: Zodion fulvi- 
frons; Tachin.: Cistogaster occidua, Epigrimyia floridensis fq, 
Peleteria. 
Silphium integrifolium (15: 463).—Blooms June 10-September 
20; 24 visitors observed, July 7-September 16; Mas, Y. 
Long-tongued Bees (18)—Ap.: Apis se; Bomb.: Bombus con- 
similis $, impatiens 9; Ceratin.: Ceratina 9, fq; Megachil.: Cypho- 
pyga 63, Megachile brevis 3, mendica 2, petulans 4, Sayapis pol- 
licaris 9, pugnata ¢ 9, se, ab, sayi 0; Epeol. (¢): Triepeolus 
concavus, remigatus, simplex; Hucer.: Epimelissodes obliqua ¢ 9, 
Melissodes agilis ¢, fq, coloradensis ¢ 9, se, trinodis ¢, fq. 
Short-tongued Bees (3)— Halict.: Agapostemon radiatus ¢ 9, 
se, Odontalictus 2; Andren.: Pterandrena pulchella 9. 
Diptera (3)—Bombyli.: Systoechus ; Conop.: Physocephala tibi- 
alis; Tachin.: Cistogaster occidua. 
Silphium laciniatum (15:463-4).—Blooms June 21—August 
30; 29 visitors observed, July 16—August 6; Mas, Y. 
Long-tongued Bees (13)—Ap.: Apis; Bomb.: Bombias separatus 
2 §, Bombus americanorum $; Ceratin.: Ceratina 2; Megachil.: 
(2) : Megachile brevis, 6-dentata, Sayapis pugnata, sc; Epeol.: Tri- 
