CHARLES ROBERTSON 77 
Long-tongued Bees (29)—Ap.: Apis ab; Bomb.: Bombias auri- 
comus ¢ ¥, scutellaris ¢ 9, fq, separatus ¢ %, Bombus american- 
orum ¢ 9%, ab, consimilis 4, impatiens 2 9%, Psithyrus variabilis 
o 2, fq; Megachil.: Megachilini: Megachile brevis ¢ 9, se, generosa 
9, Sayapis sayi 9, se, Xanthosarus ¢ 2, se, ab; Coelioxyini: Coeli- 
oxys rufitarsis 9, fq; Nomad.: Holonomada vincta ¢ 9, fq; Epeol.: 
Triepeolus concavus 9, fq, eressonii 9, fq, donatus ¢ 9, helianthi 
od 9, ab, type; Eucer.: Epimelissodes obliqua ¢ 2, se, fq, Melissodes 
agilis ¢ 9, sc, ab, autumnalis ¢ 9, se, fq, bimaculata 9, se, boltoniae 
9, se, fq, coloradensis 9°, sc, fq, nivea ¢ 9, pallida 9, type, simillima 
d, trinodis ¢ 2, se, fq, type; Anthophor.: Amegilla 9. 
Short-tongued Bees (9)—Halict.: Agapostemon radiatus ¢ 9, 
se, texanus ¢, viridulus ¢, Chloralictus versatus ?, c, Odontalictus 
o 2, se, fq; Andren. (% 9, se, ab): Pterandrena helianthi, type, 
pulchella; Panurg.: Pseudopanurgus solidaginis ¢ 9, se, fq; 
Dufoure.: Halictoides ¢ 9, se, fq. 
Other Hymenoptera (3)—Sphec.: Priononyx atrata; Bembic.: 
Bembix nubillipennis, spinolae. 
Diptera (14)—Syrph.: Eristalis latifrons ab, tenax, transversus 
ab, Helophilus latifrons, similis, Syrphus americanus, ribesii; 
Bombyli.: Exoprosopa decora, Sparnopolius ab, Systoechus fq; 
Conop.: Robertsonomyia; Tachin.: Macquartia; Musc.: Pseudo- 
pyrellia; Anthomy.: Proboscimyia fq. 
Lepidoptera (13)—Nymphal.: Anosia fq, Argynnis, Euptoieta, 
Speyeria, Vanessa cardui fq, huntera; Papilion.: Eurymus, Laertias, 
Zerene; Hesperi.: Hesperia; Arcti.: Utetheisa; Clenuch.: Scepsis; 
Noctu.: Plusia simplex. 
Coleoptera (3)—Chrysomel. (f, n): Diabrotica 12-punctata, 
longicornis ; Lampyr.: Chauliognathus pennsylvanicus. 
Hemiptera (1)—Phymat.: Phymata, pred. 
Helianthus laetiflorus—Blooms August 1-September 15; 26 
visitors observed, August 19, 20, 28; Mas, Y. 
Long-tongued Bees (9)—Bomb.: Bombias scutellaris %, sepa- 
ratus ¢, Bombus americanorum %; Megachil.: Megachile brevis ¢, 
Sayapis sayi 9, sc, Xanthosarus ¢; Epeol.: Triepeolus concavus 
do 2; Eucer.: Epimelissodes obliqua ¢ 9, sc, Melissodes agilis ¢ 9. 
Short-tongued Bees (4, 9, se)—Halict.: Chloralictus pilosus, 
versatus, Evylaeus pectoralis, Odontalictus ab. 
Other Hymenoptera (2)—Sphec.: Sphex nigricans; Ichneumon.: 
Ceratosoma. 
Diptera (6)—Syrph.: Eristalis latifrons sf, transversus f; 
Bombyli.: Exoprosopa fasciata, Sparnopolius ab, Systoechus; 
Tachin.: Siphoplagia anomala. 
