CHARLES ROBERTSON 183 
Short-tongued Bees (4)—Halict. (2?)—Agapostemon radiatus, 
Seladonia; Sphecodini: Sphecodes arvensis; Andren.: Andrena 
illinoensis ¢. 
Other Hymenoptera (5)—IJchneumon.: Colpognathus, Ichneu- 
mon funestus; 7'enthredin.: Dolerus arvensis ab, bicolor ab, sericeus. 
Diptera (2)—Syrph.: Eristalis latifrons; Anthomy.: Hyeto- 
dosia. 
Hemiptera (1)—Lygae.: Lygaeus. 
Salix longifolia—Blooms April 26—August 11; 119 visitors 
observed on staminate flowers, April 26—July 15; Mis, Y. 
Long-tongued Bees (16)—Ap.: Apis; Bomb.: Bombias auri- 
comus 9, Bombus americanorum 9; Ceratin.: Zaodontomerus <4; 
Megachil.: Megachile mendica ¢; Nomad.: Gnathias cuneatus 9, 
fq, ovatus ¢ 9, ab, Heminomada ¢ 9, fq, Holonomada superba 6, 
Nomada ecressonii ¢ 9, denticulata ¢ 9, fq, illinoensis ¢ 9, fq, sayi 
3 2, fq, Phor g 9, ab, Xanthidium luteoloides ¢; Eucer.: Tetra- 
lonia dilecta 9. 
Short-tongued Bees (43)—Halict.: Agapostemon radiatus 9, 
se, splendens 9, Chloralictus cressonii 9, nymphaearum 9, pilosus 
3 2, sparsus 9, se, fq, tegularis 9, se, versatus 2, se, fq, zephyrus 
3 2, se, fq, Curtisapis forbesii ¢ 9, fq, Evylaeus areuatus 9, se, 
foxii 9, se, fq, pectoralis 2, truncatus ¢ 9, Halictus lerouxii 9, se, 
Odontalictus 9, se, Oxystoglossa confusa ¢ 9, pura Q, similis 9, se, 
Seladonia 9, sec; Sphecodini: Sphecodes arvensis 2, minor 9, Sphe- 
codium cressonii 9; Prosopid.: Prosopis illinoensis 9, fq, pygmaea 
d, ziziae 2; Collet.: Colletes eulophi 4, inaequalis 9, se; Andren.: 
Andrena carlini 2, erythrogastra ¢ 9, sc, ab, illinoensis 9, se, fq, 
macoupinensis 9, mandibularis 9, salictaria 9, sc, sayi 2, Opandrena 
cressonii ¢ 9, se, fq, miserabilis ¢ 9, se, personata ¢', Parandrena 
o 9, se, ab, Trachandrena claytoniae ¢ 9, crataegi ¢, hippotes 9, 
se, ab, mariae ¢ 9, se, fq. 
Other Hymenoptera (10)—Sphec.: Sphex nigricans; Scoli.: 
Elis 5-cincta; Philanth.: Cerceris finitima, Philanthus punctatus 
fq; Vesp.: Polistes pallipes, variatus; Crabron.: Lindenius errans; 
Ozybel.: Notoglossa frontalis, Oxybelus packardii; Jchneumon.: 
Pimpla notanda. 
Diptera (47)—Bibion.: Bibio femoratus, pallipes; Simuli.: 
Simulium; Taban.: Chrysops striatus; Stratiomy.: Nemotelus; 
Syrph.: Allograpta, Baccha aurinota, Chilosia capillata, punctu- 
lata, Chrysochlamys, Chrysogaster nigripes, Eristalis dimidiatus 
fq, Helophilus similis, Melanostoma obscurum, Mesogramma gemi- 
nata fq, marginata, Orthoneura nitida, Paragus bicolor, Pipiza 
