144 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 1. NO. 3. 
among them being the bees (Apidae and Andrenidae) with about : 
fifty per cent, of the visitors, while the wasps are represented by I 
six species or hardly ten per cent. This result is not surprising, 
when we consider the fact that wasps, and especially those belong- i 
ing to the genus Vespa occur in small numbers in our neighbor- i 
hood and have been remarkably scarce for the last two seasons. 
And besides, the total number of visiting species is so large that ■ 
the percentage of wasps is necessarily reduced to a low rate. ' 
In addition to the bees and wasps observed on the flowers, i 
flies belonging to the families Syrphidae and Tachinidae and but- j 
terflies appear as regular visitors. i 
i 
Symphoricarpos occidentalism Hook. Wolfberry. 
(Fig. 2.) ; 
Although not as widespread as the preceding species, it occurs ; 
in abimdance in a few places in the Menomonee Valley, growing* j 
in large patches. The blooming period is from June 15. to i 
August 26. The clusters of reddish flowers are situated either ! 
at the ends of the erect or nodding branches or in the axils of 
tlie leaves. The numerous sweet scented flowers may be [ 
observed in all positions between erect and pendulous. There is i 
a contrast of color between the white inner surface of the open ! 
flowers and the distinct reddish color of the buds and thereby | 
the conspicuonsness of the inflorescence is increased. In the > 
open flower the lobes of the corolla are spread outwardly, giving j 
the flower the shape of a funnel and rendering it more accessible 1 
to short-tongued and less-specialized visitors than the bellshaped ' 
flower of vS". raccinosns, with its erect corolla lobes. When the j 
lobes are entirely spread, the flower attains a diameter of 10 mm., ; 
while the entrance to the corolla tube at the base of the lobes is | 
only 3 mm. wide. In this species, as in the preceding, the entrance ; 
is closed by tufts of dense, white hairs and in this way the nectar • 
is protected to a certain extent from the visits of unwelcome i 
guests but especially from rain. Nectar is secreted at the bottom | 
of the tube, but it also appears in minute drops on the layer of 
succulent tissue, which lines the interior surface of the tube. The 
depth of the tube being only 4 mm. and its width of 3 mm. at ] 
the entrance enabling insects to insert the lower part of their '. 
heads, it is evident, that honey can be procured by relatively [ 
short-tongued visitors. The erect style, bearing the small capi- ; 
tate stigma arises from the middle of the flower and protrudes . 
from the latter for a length of 4 mm., being altogether 8 mm. j 
long. The stamens attain the same length as the style, they are ! 
strongly divergent and for this reason the anthers are not likely i 
i 
