CHARLES ROBERTSON 125 
Megachilini: Megachile brevis ¢ 9, se, fq, mendica ?, Sayapis sayi 
& 2, Xanthosarus ¢f 2; Coelioxyini: Coelioxys germana ?; Epeol.: 
Triepeolus concavus <4, concolor ¢ 9, fq, simplex ¢; ELucer.: Epi- 
melissodes obliqua ¢ 9, Florilegus ¢ 9, sc, fq, Melissodes agilis 3, 
bimaculata ¢ 9, ab, comptoides 4, fq, petalostemonis 9, trinodis 9, 
variabilis 4, vernoniana ¢ 9; Anthophor.: Amegilla ¢, Anthe- 
moessa 9. 
Short-tongued Bees (4)—JWHalict.: Agapostemon viridulus 9, 
Halictus lerouxii ¢ 2, Oxystoglossa confusa 2, n, pura 9, n. 
Other Hymenoptera (1)—Bembic.: Bembix nubillipennis. 
Diptera (5)—Bombyli.: Exoprosopa fasciata, fascipennis, Sys- 
toechus; Conop.: Physocephala texana, Stylogaster biannulata. 
Lepidoptera (6)—JLycaen.: Everes; Papilion.: Eurymus, Laer- 
tias; Hesperi.: Atrytone delaware, Polites; Sphing.: Hemaris 
axillaris. 
LAURACEAE 
Sassafras variifolium (9: 164—5).—Blooms April 27—May 4; 91 
visitors observed, April 27—May 4; Pol, Y. 
Long-tongued Bees (1)—Megachil.: Osmia pumila 9. 
Short-tongued Bees (16)—Halict. (9): Chloralictus cressonii, 
illinoensis, sparsus se, fq, versatus sc, zephyrus se, Evylaeus arcu- 
atus, Halictus lerouxii; Sphecodini: Sphecodes arvensis, minor 
type; Andren: Andrena carlini 9, salictaria gf, Parandrena d, 
Pterandrena lauracea 2, type, Trachandrena claytoniae ¢, fq, 
forbesii 9, hippotes J. 
Other Hymenoptera (12)—Vesp.: Polistes pallipes, variatus; 
Pompil.: Cryptocheilus conicus; Ichnewmon.: Glypta rufiscutellaris, 
Idiolespa, Ophion, Pimpla annulipes; Tenthredin.: Dolerus bicolor, 
Hylotoma macleayi, Macrophya epinota, Monophadnus, Opistho- 
neura. 
Diptera (57)—Bibion.: Bibio femoratus fq, pallipes fq; Simuli.: 
Simulium; Stratiomy.: Sargus; Syrph.: Brachypalpus frontosus, 
Chilosia ecapillata, punctulata fq, Chrysogaster ontario, Criorhina 
umbratilis fq, Eristalis dimidiatus, transversus, Helophilus similis, 
Melanostoma obscurum, Mesogramma marginata, Myiolepta strigil- 
ata, Orthoneura nitida, Platychirus hyperboreus, quadratus, 
Psilota, Sphaerophoria, Syrphus americanus, ribesii, torvus ; 2mpid.: 
Empis avida, compta type, otiosa, Rhamphomyia exigua, limbata, 
mutabilis fq, piligeronis type, priapulus fq, ravida fq, in cop, type, 
sordida; Tachin.: Euphorocera claripennis, Gonia capitata, Lin- 
naemyia, Panzeria, Tachina robusta; Sarcophag.: Boettcheria, 
Cynomyia fq, Helicobia helicis, Sareophaga cimbicis, sinuata; 
