CHARLES ROBERTSON 161 
~>Isopyrum biternatum (5: 173).—Blooms March 20—May 2; 52 
visitors observed, March 26—April 30; Mi, W. 
Long-tongued Bees (7)—Ap.: Apis se, fq; Bomb.: Bombus 
americanorum 9; Ceratin.: Ceratina ¢, Zaodontomerus ¢; Mega- 
chil.: Osmia pumila ¢ 9; Nomad.: Nomada sayi ¢ 2; Eucer.: Tetra- 
lonia belfragei ¢ 9. 
Short-tongued Bees (25)—Halict. (2): Agapostemon radiatus, 
Chloralictus caeruleus, cressonii, obscurus, pilosus, sparsus se, ver- 
satus se, ab, zephyrus ab, Curtisapis coriacea, forbesii, Evylaeus 
foxii, pectoralis, 4-maculatus, Halictus lerouxii se, Oxystoglossa 
confusa se, fq, pura, Seladonia se, ab; Collet.: Colletes inaequalis 
o; Andren.: Andrena carlini ¢ 9, fq, sayi ¢ 9, fq, Opandrena 
miserabilis 9, ¢, Ptilandrena erigeniae ¢ 9, Trachandrena clay- 
toniae ¢, forbesii 2, rugosa ¢ 9, fq. 
Other Hymenoptera (1)—Sapyg.: Sapyga. 
Diptera (14)—Syrph.: Chilosia capillata sf, Eristalis dimidia- 
tus, Helophilus similis, Melanostoma obscurum, Mesogramma gemi- 
nata, marginata f, n, Sphaerophoria f, n, Syrphus americanus sf, 
ribesii, Xylota fraudulosa; Empid.: Empis nuda; Bombyli.; Bom- 
bylius major ab; Tachin.: Gonia capitata; Musc.: Pseudopyrellia. 
Coleoptera (4, f,n)—Anthic.: Corphyra terminalis; Chrysomel: 
Diabrotica vittata; Coccinell.: Megilla; Oedemer.: Asclera rufi- 
collis. 
Hemiptera (1)—Caps.: Lygus. 
Myosurus minimus.—Blooms April 7—May 17; 1 visitor ob- 
served, May 8; Mi, Y. 
Short-tongued Bees (1)—Halict.: Chloralictus zephyrus 9, 1. 
Ranunculus abortivus (7: 108-9).—Blooms March 31—June 9; 
24 visitors observed, April 8—-May 11; Mi, Y. 
Long-tongued Bees (4)—Ap.: Apis; Bomb.: Bombus ameri- 
canorum 9; Ceratin.: Ceratina ¢; Nomad.: Gnathias ovatus 9. 
Short-tongued Bees (10)—Halict. (2): Chloralictus cressonii, 
pilosus, sparsus se, fq, versatus, zephyrus, Evylaeus pectoralis, Oxy- 
stoglossa confusa, similis, Seladonia; Andren.: Opandrena per- 
sonata J, fq. 
Diptera (8)—Syrph.: Chilosia petulea, Mesogramma marginata 
fq, Paragus bicolor fq, Pipiza nigribarba, Sphaerophoria fq; 
Tachin.: Apinops, Siphona fq; Sarcophag.: Helicobia helicis. 
Coleoptera (2)—Coccinell.: Coccinella 9—-notata, Megilla f. 
Ranunculus fascicularis (7: 107-8).—Blooms March 21-May 
20; 45 visitors observed, April 11—May 5; Mi, Y. 
