Robertson — Flowers and Insects. 469 
Lepachys pinnata blooms from July 4th to August 29. 
The list was observed on fifteen days between July 11th and 
August 9th:— 
Hymenoptera — Apidae: (1) Melissodes sp. §'9, s. and c. p.; (2) M. den- 
tiventris Sm. (J, s.; (3) M. bimaculata Lep. d', S., ab.; (4) M. obliqua Say 
SP, Ss. and c. p., very ab.; (5) M. aurigenia Cr. 39,8, freq: (6) M. perplexa 
Cr. 3’, s.; (7)Megachile thethiatins Say 9’, s.;(8)M. pugnata Say 9,5 ithe Sk 
inimica Cr. §'9,8s.,ab.; (10) M. addenda Cr. 9, s.; (11) M. mendica Cr. °,8. 
(12) M. brevis Shy CO’, 8.3 (18) Alcidamea sebdiietk Cr.9, 8.3 (14) Coeioeye 
whale Cr. J, 8.3 (15) ete pig. phe F. #9, 8., ab.; (16) E. lunatus 
?,8., ab.; (17) E. mercatus F. 9, s.; “18) E. Sudiennin Say ol, 8.; 
Rescue: ( 19) Halictus tesoasit tay. Q, 8. and c. p.; (20) H. ligatus Say 
O?, 8. and c. p., ab., (21 ) H. albipennis Rob. 9,8. andc. p.; (22) eaten 
mon radiatus Say <j’, s.; (23) Augochlora humeralis Pttn. ¢',s.; Eumen- 
tdae: (24) Odynerus sp.; (25) O. arvensis Sauss.; (26) O. anormis Say; 
Bembecidae: (27) Bembex nubillipennis Cr., ab.; (28) Monedula pictifrons 
Sm., freq.; Sphecidae: (29) Ammophila fnteosta Lep.; (80) A. pictipennis 
Walsh; (31) Priononyx atrata Lep.; (32) P. thomae F.—alls 
Lepidoptera — Rhopalocera: (33) chika ap Dru. ; 
humuli Harr.; (35) Lycaena comyntas Gdt.— 
Diptera — Empidae: (36) Empis sp.; Sosilpeige: (37) Geron senilis F. ; 
petorces (38) Zodion leucostoma Will., freq.; Muscidae acalyptratae: (39) 
—alls 
(34) Thecla 
 bonaoptea = — Buprestidae: (40) Acmaeodera pulchella Hbst.; Cerambyci- 
th f. p. 
dae: (41) Typocerus sinuatus Newm.— bot 
Hevianruus Mouiis Lam.— The stems grow from six to 
ten decimetres high and bear rather large heads with yellow 
discs. The heads commonly look towards the east. They 
expand five or six centimetres or more. The disc-florets have 
tubes about six millimetres long. 
Helianthus mollis blooms from J ae 21 to September 7, and 
on August 17 and 19, was found to be visited by :— 
Hymenoptera — Apidae: (1) Bombus americanorum F. 38, 8., freq. ; ined 
ach ies obliqua Say j'f, 8. and c. p., freq.; (3) M. ossendousis is ; 
(4) Epeolus remigatus F. 9, s., freq-; Andrenidae: (5) Agapostemon 
meth F. 3,8 
Diptera — Bombylidae: (6) Anthrax halcyon Say; (7) eee vulgaris 
T Riera 8. 
Lw., freq.; Tachinidae: (8) Siphoplagia ano 
Lepidoptera — Papilionidae: (9) Colias philodice Gdt., s. 
HELIANTHUS GROSSE-SERRATUS Martens. — Visitors — ob- 
served on 16 days, between September 1 and October 4: — 
Hymenoptera — Apidae: (1) Apis mellifica L. 8, 8, ab.; (2) Bombus 
Separatus Cr. ¢'8, s.; (3) B. scutellaris Cr. 8, 8.5 (4) B. penusylvanicus 
