46 FLOWERS AND INSECTS—XXVI 
Diptera (15: 384)—Syrph.: Allograpta 2, Baccha tarchetius 1, 
Mesogramma marginata 1, Syrphus ribesii 1; Sarcophag.: Boettch- 
eria 4, Helicobia helicis 1, 4-setosa 4, Sarcophaga cimbicis 1, sinuata 
1; Musc.: Myospila 4, Phormia regina 3, Pseudopyrellia 6; 
Anthomy.: Phorbia acra 3, platura 1; Ortal.: Seoptera 1. 
Coleoptera (2: 6)—Chrysomel.: Rhabdopterus 1; Mordell.: Mor- 
dellistena ornata 5. 
COMMELINACEAE 
Tradescantia brevicaulis——Blooms April 29-June 15; 13 visi- 
tors observed, May 8-24; Ma, R. 
Long-tongued Bees (6, ¢c)—Ap.: Apis fq; Bomb.: Bombias sepa- 
ratus 2, Bombus americanorum 9°; Ceratin.: Ceratina 2; Megachil.: 
Megachile brevis 9; Hucer.: Tetralonia dilecta °, fq. 
Short-tongued Bees (7, 9, ¢)—Halict.: Chloralictus tegularis, 
versatus, Evylaeus pectoralis, 4-maculatus, Oxystoglossa similis, 
Seladonia; Andren.: Opandrena cressonii. 
Tradescantia pilosa.—Blooms June 8—-September 27; 3 visitors 
observed, July 1; Ma, R. 
Long-tongued Bees (2, 9, ¢)—Bomb.: Bombus americanorum, 
impatiens. 
Short-tongued Bees (1)—Halict.: Oxystoglossa pura 9, e¢. 
Tradescantia virginiana (5:71)—Blooms May 8—August 11; 
18 visitors observed, June 3-17; Ma, R. 
Long-tongued Bees (7, ¢)—Ap.: Apis; Bomb.: Bombias auri- 
comus 9, separatus 2 %, Bombus americanorum 9, consimilis 9, se, 
impatiens 92; Ceratin.: Ceratina 9; Eucer.: Tetralonia dilecta 9. 
Short-tongued Bees (2, 9, ¢)—Halict.: Agapostemon viridulus, 
Chloralictus pruinosus. 
Diptera (8, f, n)—Syrph.: Allograpta, Eristalis dimidiatus, 
tenax, Mesogramma marginata, Sphaerophoria, Syrphus ameri- 
canus, ribesii, Tropidia mamillata. 
Coleoptera (1)—Curculion.: Centrinites f, n. 
CoMPOSITAE 
Achillea millefolium.—Blooms May 18—August 10; 47 visitors 
observed, May 28-June 28; Mis, W. 
Long-tongued Bees (8, 9)—WMegachil.: Megachile petulans ¢; 
Bomb.: Bombias auricomus c; Nomad.: Gnathias cuneatus. 
Short-tongued Bees (4, 9)—Halict.: Chloralictus pilosus se, ver- 
satus sc, ab, Odontalictus se, Paralictus simplex. 
Other Hymenoptera (8)—Crabron.: Protothyreopus rufifemur ; 
Oxybel.: Notogldssa americana, frontalis, Oxybelus packardii; 
