104 Trans. Acad. Sci. of St. Louis. 
expands about 3 mm. It measures about 3 or 4 mm. in 
length, the tube 2 or 3 mm. The corolla, as in Mentha, is 
nearly equally four-lobed, the upper lobe being a little broader 
than the others, and the lower a little longer. The stigma is 
exserted about one mm. The hermaphrodite flowers are 
proterandrous, the anthers being exserted from one to two 
mm. 
As far as noted, Lycopus sinuatus blooms from Aug. 5 
to Sept. 16. On Aug. 13, 25 and Sept. 7, the following list of 
insects was observed, all only sucking except No. 4:— 
Diptera — Empide: (1) Empis sp.; Syrphide: (2) Chrysogaster nitida 
Wd.; (3) Mesograpta marginata Say; (4) Syritta pipiens L., s. & f. p.; 
Tachinide: (5) Siphcplagia anomala Twns.; (6) Ocyptera euchenor oe 
(7) Trichopoda pennipes F.; (8) Jurinia smaragdina Mcq., ab.; Dexide: 
(9) Scotiptera parvicornis Twns. (MS); Sarcophagide: (10) Sarcophaga 
sp.; (11) Lucilia cornicina 
Hymenoptera — Apide 18) - mellifica L. Bi (13) Bombns virginicus 
pte 
Oliv. 8; Andrenide: (14) P sopis affinis Sm. ¢; Philanthide: (15) 
Eucerceris zonatus Say; Senden (16) Ammophila sp.; (17) Isodontia 
philadelphica Lep.; Scoliidae: (18) Myzine interrupta Say. 
Lepidoptera — Rhopalocera: (19) Pholisora catullus 
ee eee (20) Chauliognathus peibayivanions DeG, 
As in the case of Mentha Canadensis, the list shows 4 
preponderance of diptera, in which it agrees with Miiller’s 
list of L. europaeus, as shown in the table. 
. 
spe 
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Bote Pie 
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Lycopus europseus — Low Secineee-— anes wert 6p ht eer 
Binuatus << Tinie 66 ose ee See esicuseures 11 2 |ooee 
Pycnanthemum lanceolatum Ph.—The stems rise from — 
5 to 11 dm., the flowers being crowded in large flat-topped, 
compound inflorescences and being fertilized by insects which © 
grawl.about over them... In the Botanical: Gazette, KIMly 194s 
Foerste gives a good account of the flowers, noting the pro- 2 ; 
terandry, the little importance of the Labiate form and the 
great variety of insect visitors. The Labiate character of the 
