1894.] Flowers and Insects. III 
Augochlora pura Say 2, s.; (25) Colletes inzqualis Say 9, 
s., ab. 
DipTERA.—Syrphide. (26) Chrysogaster nitida Wd.; (27) 
Syrphus americanus Wd.; (28) Xanthogramma felix O. S.; 
(29) Mesograpta geminata Say; (30) Spherophoria cylindrica 
Say; (31) Eristalis dimidiatus Wd.; (32) Helophilus similis 
Meq.; Tachinidae: (33) Jurinia apicifera Wlk.; (34) Gonia 
exul Will., ab.; (35) G. frontosa Say, ab.; Muscidae: (36) Lu- 
cilia cesar L.; (37) L. cornicina F. freq.; Cordyluridae: (38) 
Scatophaga squalida Mg.—all sucking. 
LEPIDOPTERA.—WNoctuidae: (39) Plusia simplex Gn., s. 
RHUS-GLABRA L.— The greenish-yellow flowers are 
crowded in dense terminal panicles. Each flower forms a 
broad, shallow cup, in the bottom of which is situated a broad, 
yellow, five-lobed disc, which secretes nectar. In the pistil- 
late flower access to the disc is impeded only by the style with 
its three large stigmas, and by small tufts of hairs on the in- 
ner faces of the five petals. In the staminate flower the disc 
8 somewhat concealed by the large anthers. 
As far as observed this species seems to be dicecious. In 
= patch of plants on which most of the insects were taken I 
0 only pistillate flowers, I have also found patches in 
hy all of the lowers appeared to be staminate, and in which, 
ater the flowers fell, no fruit was to be seen, but only the 
naked axes of the panicles. 
“ have noted the flowers in bloom from June 8th to 24th. 
1 account of 
Merous insects 
u Owers on three days, June 22d to 24th. 
(2) Se Apidae: (1) Apis mellifica L. ¥, s., ab.; 
r. 2 ina dupla Say 9, s. and c. p-; (3) Heriades carinatum 
3, 8.; ( ) iy c. p.; Andrenidae: (4) Andrena crataegi Rob. 
2 Halictus arcuatus Rob. 9 Sand ¢.-p., abi, (0) 
» 8.5 (7) H. lerouxii Lep. 9, s.; (8) H. fascia- 
Pruinosus Reg (9) H. pilosus Sm. 9, 5. and -e, ee FiO) HH. 
a; (12) y °®. 6% s.; (11) H. confusus Sm. 29, s. and ¢. p., 
a zephyrus Sm. 9, s, and c. p.; (13) H. stultus Cr. 
(15) pels B ab. ; (14) Augochlora pura Say 2, s. and c. P.; 
tus a aig ©Mon bicolor Rob, 9, s. and c. p.; (16) A. radia- 
’ 8-5 (17) Colletes willistonii Rob. $9, s., freq.; (18) 
