CHARLES ROBERTSON 75 
Triepeolus cressonii 9, ab; Lucer.: Epimelissodes obliqua ?, Melis- 
sodes agilis ¢, boltoniae 2, se, ab, simillima 9, se, type, trinodis 2, se. 
Short-tongued Bees (3)—Halict.: Agapostemon viridulus d, 
Seladonia 9, se; Collet.: Colletes compactus Q, se. 
Other Hymenoptera (7)—Sphec.: Priononyx atrata, Sphex 
nigricans, procera; Bembic.: Bembix spinolae, Bicyrtes ventralis 
fq; Vesp.: Polistes variatus, Vespula germanica. 
Diptera (4)—Syrph.: Syrphus arcuatus; Bombyli.: Anthrax 
haleyon, Sparnopolius. 
Lepidoptera (4)—Nymphal.: Phyciodes; Papilion.: Eurymus; 
Hesperi.: Limochores taumas; Ctenuch.: Scepsis. 
Coleoptera (2)—Lampyr.: Chauliognathus pennsylvanicus ab; 
Melo.: Epicauta pennsylvanica f, n. 
Hemiptera (1)—Pentatom.: Euschistus fissilis. 
Helianthus annuus (cult).—Blooms July 10-September 11; 42 
species and 434 individuals observed, July 11-September 6; Mas, Y. 
Long-tongued Bees (19: 311)—Ap.: Apis se, 65; Bomb.: Bom- 
bias separatus 4’, 12, Bombus americanorus ¢ 9 Y, se, 117, con- 
similis %, 2, impatiens ¢ Y, se, 26, ridingsii ¢, 5, Psithyrus varia- 
bilis ¢ 2, 8; Ceratin.: Ceratina 9, se, 1; Megachil. (2) : Megachile 
mendica se, 1, Sayapis sayi 1, Xanthosarus 1; Epeol.: Triepeolus 
concavus 9, 1; Eucer.: Epimelissodes obliqua ¢ 9, se, 6, Melissodes 
agilis ¢ 9, se, 50, autumnalis 9, 1, bimaculata ¢ 9, 2, boltoniae 
3 9, se, 6, coloradensis 9, se, 2, trinodis ¢ 9, se, 4. 
Short-tongued Bees (9:69)—Halict.: Agapostemon viridulus 
& 9, 11, Chloralictus pilosus 9, ¢, 1, sparsus 9, ¢, 1, versatus 9, 
ce, 2, Odontalictus ¢ 9, se, 50, Oxystoglossa confusa 9, 1, Seladonia 
3,1; Andren.: Pterandrena helianthi ¢, 1, pulchella 9, 1. 
Diptera (5:36)—Syrph.: Eristalis brousi 1, transversus 1, 
Syritta f, 1, n; Bombyli.: Anthrax alternata f, 1, n, Sparnopol- 
ius 32. 
Lepidoptera (4:10)—Nymphal.: <Anosia 1, Argynnis 3; 
Papilion.: Pieris 2; Hesperi.: Limochores taumas 4. 
Coleoptera (4:5)—Chrysomel. (f, n): Diabrotica 12-punctata 
1, longicornis 1, vittata 1; Lampyr.: Chauliognathus pennsyl- 
vanicus 2. 
Hemiptera (1:3)—Caps.: Lygus 3. 
Helianthus divaricatus (10: 244-5).—Blooms July 22-Septem- 
ber 15; 75 visitors observed, July 22-September 19; Mas, Y. 
Long-tongued Bees (38)—Ap.: Apis; Bomb.: Bombias scutel- 
laris Y, sc, separatus ¢, Bombus americanorum ¢ 9%, ab; Ceratin.: 
