CHARLES ROBERTSON 193 
Solanum nigrum (13: 582).—Blooms June 6—October 20; 2 vis- 
itors observed, August 29, September 3; Ma, W. 
Long-tongued Bees (2, $, ¢)—Bomb.: Bombus americanorum, 
impatiens. 
Solanum rostratum (int).—Blooms July 9—October 4; 1 visitor 
observed, July 23; Ma, Y. 
Long-tongued Bees (1)—Bomb.: Bombus americanorum ¥, e. 
STAPHYLEACEAE 
Staphylea trifolia (14: 302-3).—Blooms April 23~May 12; 21 
visitors observed, April 23—May 11; Mi, W. 
Long-tongued Bees (4)—Ap.: Apis se, ab; Bomb. (9, ab): 
Bombus americanorum, consimilis, impatiens. 
Short-tongue Bees (9)—Halict. (9): Curtisapis coriacea, 
Evylaeus 4—maculatus, Seladonia; Collet.: Colletes inaequalis ¢; 
Andren.: Andrena mandibularis 9, pruni 9, sc, sayi ¢ 9, fq, in cop, 
type, Opandrena miserabilis 9, Trachandrena nuda 9, type. 
Other Hymenoptera (1)—Vesp.: Vespula maculata. 
Diptera (4)—Syrph.: Eristalis flavipes f; Empid.: Empis otiosa 
ab, Pachymeria; Bombyli.: Bombylius major. 
Lepidoptera (1)—Hesperi.: Thanaos juvenalis. 
Coleoptera (2)—Cerambyc.: Molorchus; Scarabae.: Euphoria 
sepulchralis. 
Hemiptera (1)—Caps.: Lygus. 
THYMELAEACEAE 
Dirca palustris (9: 73-4).—Blooms March 18—April 30; 11 vis- 
itors observed, March 21; Mi, Y. 
Long-tongued Bees (4, ¢')—Ceratin.: Ceratina, Zaodontomerus ; 
Megachil.: Ceratosmia; Nomad.: Gnathias cuneatus. 
Short-tongued Bees (6)—Halict. (2): Chloralictus smilacinae, 
versatus, zephyrus, Oxystoglossa pura; Collet.: Colletes inaequalis 
o; Andren.: Trachandrena rugosa ¢. 
Lepidoptera (1)—Nymphal.: Euvanessa. 
TILIACEAE 
Tilia americana.—Blooms June 4—July 12; 29 species and 130 
individuals observed, July 2, 6, 7; Mi, Y. 
Long-tongued Bees (2:37)—Ap.: Apis 36; Bomb.: Bombus 
americanorum 9, 1. 
Short-tongued Bees (11: 61)—Halict.: Augochlora viridula ¢ 
9, 8, Chloralictus illinoensis 9, 1, sparsus ¢ 2, se, 22, versatus 9, 4, 
zephyrus 9, se, 12, Curtisapis coriacea 9, se, 1, forbesii 2, 2, Evylaeus 
