Robertson — Flowers and Insects — Labiate. 1 13 
the Odynerus. In this category I have observed: (28) Apis 
mellifica L. 9, ab. ; (24) Ceratina dupla Say 9; (29) Agapos- 
temon radiatus Say 9; (30) Augochlora pura Say 9; (31) 
Halictus ligatus Say 9; (32) H. lerouxii Lep. 9; (33) H. 
fasciatus Nyl. 9; (34) H. pilosus Sm. 9; (25) H. confusus 
Sm. 9; (35) Ammophila pictipennis Walsh. 
Blephilia ciliata Raf. —The stems rise from 3 to 6 dm. 
and are simple, or sparingly branched, the stems and branches 
each bearing 3 or 4 head-like whorls, which measure about 3 
em. across. 
The corolla is pale-purplish, the lower lip dotted with pur- 
ple. The upper lip is narrow and commonly reflexed, form- 
ing a very imperfect helm. The lower lip is wider, 3- 
lobed, the middle lobe being long and narrow. The stamens 
are two, their anthers being exposed in the throat of the 
corolla. The anthers discharge their pollen before the stigma 
is receptive. The style becomes strongly exserted, holding 
the receptive stigma far beyond the upper lip. Sometimes 
plants are found having flowers with aborted anthers, which 
shows that the species is gynodiccious. 
On account of the exposure of the anthers and stigma and 
their close approximation, the flowers are so degraded that 
thev have little advantage over regular, erect flowers. If 
these organs were protected, the flower would dust the back 
of each visitor in a very precise manner. As it is, insects 
crawl over the heads in an indefinite way, readily pollinat- 
ing flowers which they do not visit. If the flowers were 
widely separated, insects like Ammophila would hardly visit 
them. 
The corolla tube measures about 8 mm. and is, therefore, 
evidently adapted to long tongues, especially bees. On ac- 
count of the exposed situation of the anthers, the flower is 
also visited for pollen by small bees which cannot drain the 
tubes, although they may reach some of the nectar which rises 
in them. 
The plant is common in dry grounds and blooms from June 
1 to July 3. On 8 days, between June 2 and 22, I collected 
the following visitors: — 
