CHARLES ROBERTSON 65 
Long-tongued Bees (14)—Bomb.: Bombias auricomus ¢ 2 ¥, 
se, fq, scutellaris ¢ ¥, sc, separatus ¢ 2, Bombus americanorum 
3& 2 Y, se, ab, impatiens 2 %, sc, Psithyrus variabilis ¢ 9, ab; 
Megachil.: Xanthosarus ¢ 9, se, fq; Epeol.: Triepeolus concavus 
3 2; Eucer.: Epimelissodes obliqua ¢ 9, se, ab, Melissodes agilis J, 
enici ¢ 9, se, ab, coloradensis 9, sc, variabilis ¢; Emphor.: Meli- 
toma 9. 
Short-tongued Bees (5, 2, ¢, n)—Halict.: Chloralictus prui- 
nosus, sparsus, versatus, Odontalictus; Collet.: Colletes eulophi. 
Diptera (2)—Bombyli.: Exoprosopa fasciata, Systoechus. 
Lepidoptera (9)—Nymphal.: Anosia, Argynnis, Speyeria, Va- 
nessa cardui; Papilion.: Callidryas, Heraclides, Papilio; Sphing.: 
Deilephila, Hemaris thysbe. 
Coleoptera (1)—Chrysomel.: Diabrotica longicornis f, n. 
Cirsium lanceolatum (int, 15: 475-6).—Blooms June 24—Octo- 
ber 27; 48 visitors observed, July 3—October 27; Mas, R. 
Long-tongued Bees (25)—Bomb.: Bombias auricomus %, sepa- 
ratus ¢ 9, fq, Bombus americanorum ¢ @ 9, se, ab, in cop, con- 
similis %, impatiens 9, fq, Psithyrus laboriosus ¢, variabilis ¢; 
Megachil.: Megachile 6-dentata ¢, type, Xanthosarus Q, se, fq; 
Epeol.: Triepeolus concavus ¢, concolor ¢ 9, fq, donatus ¢, neva- 
densis 4, remigatus 2; Eucer.: Epimelissodes obliqua ¢ 9, fq, Melis- 
sodes agilis ¢, bimaculata 9, enici ¢ 9, se, ab, in cop, type, colo- 
radensis ¢, comptoides ¢ 9, simillima ¢, trinodis 9, variabilis 9; 
Emphor.: Emphor ¢; Anthophor.: Amegilla ¢. 
Short-tongued Bees (6)—Halict.: Agopostemon radiatus ¢, 
texanus 9, sc, viridulus ¢ 9, se, Chloralictus pilosus 92, ¢, n, Odon- 
talictus 9, ¢, n; Nomt.: Paranomia 9. 
Diptera (3)—Bombyli.: Exoprosopa fasciata, Systoechus fq; 
Conop.: Physocephala tibialis. 
Lepidoptera (14)—Nymphal.: Anosia, Phyciodes, Speyeria; 
Papilion.: Euphoeades, Eurymus, Jasoniades, Papilio, Pontia, 
Xanthidia; Hesperi.: Atrytone zabulon, Limochores taumas fq, 
Polites, Thorybes bathyllus; Ctenuch.: Scepsis. 
Cirsium pumilum—Blooms May 25—June 29; 17 visitors ob- 
served, May 29, June 26; Mas, R. 
Long-tongued Bees (4, 9)—Bomb.: Bombus americanorum, 
Psithyrus variabilis; Megachil.: Cyphopyga sc, Sayapis pugnata se. 
Short-tongued Bees (1)—Halict.: Evylaeus pectoralis 9, e, n. 
Lepidoptera (9)—Nymphal.: Anosia, Argynnis ab, Speyeria; 
Papilion.: Euphoeades, Eurymus, Heraclides, Laertias; Hesperi.: 
_ Polites, Thorybes bathyllus. 
