118 Trans. Acad. Sci. of St. Louis. 
The flowers are open from April 7 to June 21. On 6 days, 
between Apr. 28 and May 20, I observed as visitors: — 
Hymenoptera — Apide: (1) Apis mellifica L. 8, ab.; (2) caey va- 
gans Sm. @; (3) B. ridingsii Cr. 9; (4) B. auibitanuarins Os (5) 
fervidus F. 9, two, the only specimens I have seen here; (6) icant 
abrupta Say ¢'@, ab.; (7) Synhalonia speciosa Cr. ¢'9,ab.; (8) Ceratina 
dupla Say ¢'@, ab.; (9) Alcidamea producta Cr. ¢; (10) Osmia albiventris 
Cr. 9, freq.; (11) Novosti superba Cr. 9, freq.; Andrenide: (12) Augochlora 
pura Say Q; (13) A. lucidula Sm 
Diptera — Bombylide: (14) Homoyiras atriceps Lw., ab.; Syrphide: (15) 
Rhingia nasica Sa 
Lepidoptera — Bhopalocera: (16) Pieris rape L.; (17) Colias philodice 
Godt., ab.; (18) Pamphila zabulon B.-L.; (19) P. peckius Kby.— all sucking. 
elit. a|. 2 
HS onl 
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3) Sia /Slelalsisisislslalaisi. 
aSlalSisisleisieisisisicisisr 
SESS SiSslslSlols eislalajals 
HOsipidisiniols| siSiclSainiolo 
SR I< fen 1 <DIV |e it 0 fs a 
Low Germany — Miiller | 1a 1 s}-s]-4] 3} 3] 3 4 2} 1) 1) 4/28 
Tilinois PU} 4 a) a} a} ala} al. }. | 2! al allt 4h 
Scutellaria parvula Mx. — This is one of the earliest bloom- 
ing of indigenous Labiates. The plants are scattered, or 
sometimes collected in thin patches. The stems rise 2 or 3 
dm. The flowers are solitary in the axils of the opposite 
leaves, so that they appear in pairs. When several flowers 
are open at the same time they seem to be arranged in loose 
spikes. 
The corolla measures about 9 mm., the tube being about 7 
mm. and so wide above that it readily admits the head of a 
small bee for about 3mm. The lower lip measures 5 mm. 
across and is directed downwards, forming the most attractive 
part of the flower. Thecorolla is blue, the lower lip being 
marked by a large squarish white spot dotted with purple and 
with streaks above leading into the throat. 
The upper lip includes the lateral lobes. The upper lobe 
is only large enough to cover the anthers. The result is that 
the mode of pollen contact is of the most definite sort, 
the anthers touching the upper part of the bee’s head and 
thorax. The lateral lobes are folded inwards under the anthers, 
so that a bee only touches them when the lateral lobes are 
