458 Trans. Acad. Sci. of St. Louis. 
sodes eee Cr. 9, p., freq.; Andrenidae: (7) Andrena solidaginis 
Rob. FtS) fHallctis ligatus Say 9,8. andc.p.; (9) H. confusus Sm. 
cus Say; (12) P. pallipes Lep.; Humenidae: (13) Odynerus tigris Sauss.; (14) 
O. capra Sauss., ab.; (15) O. catskillensis Sauss.; Crabronidae: (16) Cralite 
10-maculatus Say; Philanthidae: (17) Eucerceris zonatus Say; geyireens 
(18) ee brevipennis Walsh; (19) Bembex nubillipennis Cr.; Larri- 
dae: (29) Ancistromma distincta Sm.; Sphecidae: (21) Paoaceye eae 
Lep.; Ponptiiae: (22) Priocnemis daivicorals Cr.; Scoliidae: (23) Myzine 
excincta F.; (24) Scolia bicincta F.;— all s. 
Diptera — Syrphidae: (25) Ssksalosioria cylindrica Say; (26) Helophilus 
similis Mcq., ab.; (27) H. latifrons Lw.; Tachinidae: (28) Cistogaster occi- 
dua WIk.; (29) Miltogramma flavicornis ina (30) Atrophopoda singularis 
Twns.; Muscidae: (31) Lucilia cornicina F.; (32) Compsomyia macellaria 
F.—all s. orf. p 
Lepidoptera — Rhopalocera: (83) Phyciodes tharos Dru.; (34) LS boeing 
huntera F.; (35) Chrysophanus thoe B. — L.; (36) Lycaena comyntas Gdt. 
(87) Colias philodice Gdt.; Heterocera: (38) Utetheisa Lede L.; (39) Helio- 
this armiger Hbn.; (40) Crainbus laqueatellus Clem 
Coleop 1th Taney ridae: (41) Chauliognathus siutilioy PahICUs De G., f. 
p-, ab.; Meloidae: (42) Epicauta pennsylvanica De G., 
Bottonta astERorDes L’Her.— The plants are often col- 
lected in rather large patches in moist places, and are quite 
attractive to insects. The heads have yellow disc florets and 
white rays, and expand fifteen millimetres or more. The rays 
are pistillate, the disc florets being perfect. Nectar and pol- 
len are supplied by the latter. The tubes of the disc florets 
are only about one millimetre deep, so that numerous short- 
tongued insects can obtain the nectar. 
The list of visitors was observed September 20, 28, October 
2 aud 4:— 
Hymenoptera — Apidae: (1) Bombus americanorum F. 8, s.; (2) Melis- 
sodes sp. Q, s.; (3) M. confusa Cr. 9, s. andc. p.; (4) Megachile mendica 
Cr. 9, 8.; (5) M. brevis Say 9, s.; (6) Calliopsis compositarum Rob. . 
and c. p., ab.; (7) C. solidaginis Rob. 9, s.; Andrenidae: (8) Andrena soli- 
daginis Rob. (9, s. and c. p.; (9) Halictus ligatus Say §'9, 8.; (10) H 
confusus Sm. ¢'Q,s. andc. 4 ., freq.; (11) Agapostemon radiatus Say @, 8.3 
(12) ose tae mandibularis Cr. 9, s.; (13) Colletes americana Cr. ‘2; 
8. andc. p., ab.; (14) Syeda affinis Sm. <j, s.; (15) P. pygmaea Cr. f'2, 8-5 
Vespidae: as Polistes pallipes Lep., s.; isnt (17) Odynerus anormis 
Ys 8.3 x sent (18) Priononyx thomae F., 
Diptera — Bombylidae: (19) Sparnopolius sinean Wd.,s.; Conopidae: (20) 
Sisompik: loraria Lw.,s.; Syrphidae: (21) Paragus tidialis Fll.; (22) Syr- 
phus americanus Wd.; (23) Mesograpta marginata Say; (24) Sphaerophoria 
cylindrica Say; (25) Eristalis dimidiatus Wd.; (26) Syritta pipiens L.— 
