CHARLES ROBERTSON 165 
Amelanchier canadensis (15: 446-7).—Blooms March 26—May 
1; 51 visitors observed, April 10-22; Mis, W. 
Long-tongued Bees (6)—Ap.: Apis se, ab; Bomb.: Bombus 
americanorum 9, ridingsii 9; Ceratin.: Ceratina @&; Nomad.: 
Nomada denticulata ¢, illinoensis ¢. 
Short-tongued Bees (27)—Halict. (2); Agapostemon radiatus, 
Chloralictus caeruleus type, cressonii, pilosus se, fq, sparsus, 
versatus se, ab, zephyrus ab, Evylaeus arcuatus se, fq, foxii, Halictus 
lerouxii, Seladonia sc; Collet.: Colletes inaequalis ¢ 9, fq; Andren.: 
Andrena carlini ¢ 9, erythrogastra ¢ 9, fq, erythronii ¢, man- 
dibularis 4, salicis ¢ 9, fq, salictaria 9, fq, sayi ¢ 9, fq, Opandrena 
eressonii ¢° 2, sc, ab, miserabilis ¢ 9, ab, Parandrena ¢ 9, fq, 
Trachandrena claytoniae ¢ 9, fq, forbesii ¢ 9, fq, type, hippotes 
Jo 2, mariae 4, rugosa ¢. 
Other Hymenoptera (1)—Z'enthredin.: Dolerus arvensis. 
Diptera (17)—Syrph.: Brachypalpus frontosus, Eristalis 
aeneus, dimidiatus fq, transversus, Helophilus similis, Mesogramma 
geminata, marginata, Platychirus quadratus, Sphaerophoria, 
Syrphus americanus fq; Bombyli.: Bombylius major; Tachin.: 
Euphorocera claripennis, Gonia ecapitata; Sarcophag.: Cynomyia 
fq; Musc.: Pseudopyrellia; Anthomy.: Hammomyia; Scatophag.: 
Seatophaga fq. 
Aruncus sylvester (15: 437; 16: 165-9).—Blooms May 24—June 
20; 78 visitors observed, June 4-20; Mis, W. 
On staminate flowers (43) :— 
Long-tongued Bees (3)—Megachil.: Neotrypetes truncatus ¢; 
Nomad.: Centrias americanus ?, Holonomada affabilis ¢. 
Short-tongued Bees (6)—Halict.: Chloralictus versatus 9; 
Prosopid.: Prosopis pygmaea 9; Andren.: Opandrena personata 
9, serotina ¢, Trachandrena nuda Q, se, spiraeana 9, se, ab, type, 
oligolege. 
Other Hymenoptera (3)—Eumen.: Eumenes fraternus; Cra- 
bron.: Anacrabro; Ozrybel.: Notoglossa frontalis. 
Diptera (7)—Syrph.: Chilosia pallipes, Chrysogaster nigripes, 
Sphegina rufiventris; Empid.: Empis distans fq; Conop.: Zodion 
nanellum ; Agromyz.: Phytomyza palpalis type; Oscin.: Siphonella 
cinerea. 
Coleoptera (23)—Bruch.: Bruchus  hibisei; Cerambye.: 
Aemaeops directa, Leptura exigua, vittata, Typocerus badius, 
lugubris; Chrysomel.: Disonycha; Curculion.: Centrinus picumnus 
ab; Elater.: Seracosomus; Malach.: Anthocomus, Attalus fq, 
Melyris fq; Mordell.: Mordellistena biplagiata fq, lutea, ornata, 
