CHARLES ROBERTSON 89 
epeolus concavus d, concolor ¢ 9; Hucer.: Epimelissodes obliqua J, 
Melissodes agilis ¢ 9, ab, bimaculata 4’, coloradensis ¢ 2, se, fq. 
Short-tongued Bees (5, 9)—WHalict.: Agapostemon texanus se, 
viridulus se, Chloralictus pilosus ¢, n, sparsus ¢, n, Odontalictus 
¢, n. 
Diptera (9)—Syrph.: Allograpta, Eristalis latifrons, transver- 
sus, Tropidia mamillata; Bombyli.: Anthrax alternata f, n, Geron 
rufipes, Systoechus ; Conop.: Zodion fulvifrons, obliquefasciatum. 
Lepidoptera (2)—Nymphal.: Anosia; Papilion.: Eurymus fq. 
Silphium perfoliatum (16: 176-7).—Blooms July 9-September 
12; 75 visitors observed, July 23-September 12; Mas, Y. 
Long-tongued Bees (26)—Ap.: Apis se, fq; Bomb.: Bombias 
seutellaris ¢, separatus ¢ %, Bombus americanorum ¢ @ Y, se, fq, 
consimilis 8, se, fq, impatiens 9, se, fq; Ceratin.: Ceratina 9, se, fq; 
Megachil.: Megachilini: Megachile brevis ¢ 9, se, mendica ¢ Q, se, 
petulans ¢ 9, se, fq, Sayapis pugnata 2, se, fq, sayi f'; Coelioxyini: 
Coelioxys germana <{; Lpeol.: Triepeolus concavus ¢ 2, concolor 
3 9, fq, lunatus J, remigatus ¢ 9, fq, simplex ¢; Hucer.: Epimelis- 
sodes obliqua ¢ 9, se, Melissodes agilis ¢ 2, fq, bimaculata J, colora- 
densis ¢ 2, se, simillima J, trinodis ¢ 9, fq, vernoniae 9, vernoni- 
ana ¢ 9, fq. 
Short-tongued Bees (14)—Halict.: Agapostemon radiatus ¢ 9, 
se, splendens , viridulus 9, se, fq, Chloralictus pilosus 2, ¢, fq, n, 
sparsus 9, ¢, fq, n, versatus 2, ¢, n, Evylaeus pectoralis 9, ¢, n, Ha- 
lietus lerouxii 2, Odontalictus 9, se, Oxystoglossa confusa 9; An- 
dren.: Pterandrena aliciae 9, pulchella ¢, fq; Panufg.: Pseudo- 
panurgus labrosiformis ¢, fq, rugosus ¢ 9. 
Other Hymenoptera (3)—Sphec.: Sphex procera; Scoli.: Seolia 
bicincta ; Lumen.: Leionotus dorsalis. 5 A 
Diptera (12)—Syrph.: Allograpta f, n, Eristalis tenax, trans- 
versus, Milesia f, n; Bombyli.: Anthrax alternata,f, n, haleyon, Ex- 
oprosopa fasciata, Geron rufipes, Sparnopolius, Systoechus fq; 
Conop.: Zodion obliquefasciatum ; Tachin.: Archytas aterrima. 
Lepidoptera (20)—Nymphal.: Anosia, Basilarchia archippus, 
astyanax, Charidryas, Polygonia interrogationis, Vanessa atalanta, 
eardui, huntera; Lycaen.: Chrysophanus; Papilion.: Euphoeades, 
Eurymus, Heraclides, Jasoniades, Laertias, Pontia; Hesperi.: Atry- 
tone delaware, zabulon, Epargyreus, Limochores taumas, Pholisora 
eatullus. 
Silphium terebinthinaceum.—Blooms July 2-September 30; 13 
visitors observed, August 9-28; Mas, Y. 
