Flowers and insects. XVI.'. 
CHARLES ROBERTSON. 
NOTHOSCORDUM STRIATUM Kunth. WV. ornithogalotdes 
Walt.) Kunth.—The plant is common in woods, blooming 
from April toth to May 16th. The scapes grow I or 2™ high 
and bear small umbels of white flowers. The flowers are 
about 10™" long and expand 10 or 12™". The sepals are ap- 
proximated below, the base of the tube being greenish and nat- 
rowed by the ovary and the filaments of the six stamens. 
The flowers are homogamous, the stigma occupying the center 
of the circle of anthers and somewhat surpassing them. 
Spontaneous self-pollination can hardly occur. 
The flower is remarkable for being abundantly visited by 
numerous species of bees of the genus NMomada. On seven 
days, between April zoth and May goth, I captured the follow- 
ing visitors: 
HyMENoprera—Apide: (1) Nomada luteoloides Rob. é; (2) N. st 
perba Cr. 4, freq.; (3) N. americana Kby. ; (4) N. maculata Cr. 89, ab.; 
{5) N. cressonii Rob. 49, ab.; (6) N. sayi Rob. 89, freq.; Andrenida: () 
Augochlora similis Rob. 9, ab.; (8) Halictus confusus Sm. 3,5. and C. P.; 
(9) Andrena sp. ¢, s. and c. p., freq. 
DipTerRa—Syrphide : 10) Mesograpta marginata Say; (11) Sphaero- 
phoria cylindrica Say, ab. ieri 
EPIDOPTERA—Lhopalocera: (12) Colias philodice Gdt.; (13) Pieris 
tape L.; (14) Lycaena comyntas Gdt.; Heterocera: (15) Plusia simplex 
Gn.—All only sucking, except (8) and (g). 
CAMASSIA FRASERI (A. Gray) Torr.—The flower is 
scribed and figured by Loew (2) from material growing in the 
Berlin Garden. According to his account, the inflorescenc® 
consists of a long loose raceme of twenty or more Howél™ 
The flowers are directed obliquely upwards and have widely 
expanded sepals. The anther faces are directed forwards , 
as to touch the visitors, and the stigma is about 4™ 10 fi 
vance of them. Nectar is secreted by septal glands and col 
lects under the base of the ovary. 
Loew (1) saw the flowers visited by Apis mellifica and Os 
rufiventris. He, however, does not consider them to be 8 h 
apted to these middle-sized bees, but to Lepidoptera he 
mia 
ad- 
1Contributions to an acc . x , tomophiloas 
ount of the ecological relations of the eo F ville, 
stay the anthophilous insect fauna of the neighborhood of Carlinv! 
[266] 
