5°4 
The Ohio Naturalist. 
[Vol. XII, No. 6, 
which are of two lengths, are united with the corolla tube for some 
distance above the stigmatic surface. As the bee’s proboscis is 
inserted into the flower it pushes past the retrorse anthers to the 
nectar at the base of the tube. As the proboscis is withdrawn, in 
passing the anthers it bends them upward so that the dehisced 
surfaces, which normally lie downward and against the corolla 
tube, deposit pollen upon the tip of the proboscis wet with nectar. 
Should insect visits fail, automatic self-pollination may occur 
between the shorter stamens and the stigma, according to Knuth. 
Visitors — Lepidoptera; Epargvreus tityrus, Spragueia ona- 
grus, Lycaena scudderi: Diptera; Svritta pipiens, Allograpta 
obliqua, Sphaerophora cylindrica, Tropidia quadrata, Helophilus 
latifrons, Phthiria cyanoceps; Hymenoptera; Microbembex mono- 
donta, Agapostcmon radiatus, Ceratina dupla, Odynerus for- 
aminata, Megachile latimanus. 
EXPLANATION OF PLATE XXIV. 
Fig. 1. Blephilia ciliata. 
Fig. 2. Stachys tenuifolia, showing relative position of anthers and stigma. 
Fig. 3. Teucrium canadense, showing relation of anthers to stigma. 
Fig. 4. Dianthera americana showing separated anther lobes. 
Fig. 5. Mimulus ringens. 
Fig. 6. Verbena hastata. 
Fig. 7. Longitudinal section of V. hastata, showing ring of hairs in throat 
of corolla, retrorse anthers with dehiscent surfaces downward and 
against corolla tube. 
