Robertson — Flowers and Insects. 471 
HELIANTHUs TUBEROSUS L.— The stems grow two or three 
metres high ; and bear conspicuous yellow heads which expand 
from six to eight centimetres. The disc florets haye corollas 
with tubes six milimetres long. 
On fifteen days during the blooming time — August 13 to 
26 —I observed the following visitors: — 
An ge Heeler ree (1) Bombus vagans Sm. ¢',s.; (2) B. american- 
orum F. ‘8, and c. p., freq.; (3) B. separatus Cr. ie 8.; (4) Melis- 
sodes Secesomtitid ‘Sia. 32, 8.3 (5) M. obliqua Say 9, s. and c. p., ab.; (6) 
M. coloradensis Cr. Jd 2, 8. and c. p., freq.; (7) M. canines Cr. 39,8 
and c. p., freq.; (8) M. confusa Cr. 4’, s.; (9) Megachile inimica Cr. 9, c. 
p.; (10) M. brevis Say 9, s.; (11) Epeolus lunatus Say 9, s.; (12) E. rem- 
igatus F. 9, s.; (13) Nomada vincta Say 9,s.; (14) Calliopsis labrosus 
Rob. (MS) $9, s. and c. p.; (15) C. rugosus Rob. (MS) f'9, s. ande. p, 
ab.; Andrenidae: (16) Andrena pulchella Rob. j'9, s. and c. p., ab.; (17) A. 
aliciae Rob. 9, s. and c. p.; (18) wr coriaceus Sm. 9, s. and c. p.; 
(19) H. pectinatus Rob. 9, s. and c. p.; (20) H. ligatus Say 9,s. andc. p.; 
a (21) Cerceris sonnei Cis s.; Scolitdae: (22) Al bicincta 
meats a Sleayiin (23) Exoprosopa fascipennis Say, freq.; (24) E. 
decora Lw.; (25) Anthrax halcyon Say, freq.; (26) Systoechus vulgaris Lw., 
freq.; (27) Sparnopolius fulvus Wd.,ab.—all s.; Syrphidae: (28) Eristalis 
transversus Wd., s.; (29) E. tenax L.,f.p.; Muscidae: (30) Lucilia cornicina 
F., 8.; Trypetidae: (31) Trypeta finalis Lw 
Lepidoptera — Rhopalocera: (32) Phyciodes tharos Dru.; (33) Thecla 
m-album B.—L.; (34) Colias philodice Gdt.; (35) Pholisora catullus F. — 
all s. 
Coleoptera — Lampyridae: (36) Chauliognathus pennsylvanicus De G.; 
Chrysomelidae: (37) Diabrotica longicornis Say; Mordellidae: (38) Mor- 
della scutellaris F.; Meloidae: (89) Epicauta pennsylvanica De G. —all f. p. 
VERBESINA HELIANTHOIDES Michx. — The plants grow from 
six to twelve decimetres high and have few heads, five or six 
centimetres wide. The rays are neutral, the disc-florets 
hermaphrodite. 
The corollas are five or six mm. long. 
The plant blooms from June 16 to August 10. The 
Visitors were observed on July 5, 6, and 11 :— 
none re (1) Apis mellifica L. 8, 8., one; (2) Bombus 
mericanorum F. $, s.; (3) Melissodes obliqua Say 9, s.; (4) Ceratina 
dupla Say 9, 8.; (5) Mocusnts pollicaris Say <j’, 8.; (6) M. pugnata Say 
?, 8. and c. p., freq.; (7) M. brevis Say g'9, 8. and c. p., freq.; (8) M. 
mendica Cr. 9 s. and c. p.; (9) M. petulans Cr. j,s.; (10) Aleidamen 
producta Cr. 9, ¢. p.; (11) Coelioxys sp. qj, 8.; (12) C. altilis Cr. J, s.; 
(13) Calliopsis sthiserins Cr. o'; 8:3 Sedveitice: (14) Halictus lerouxii 
