Robertson — Flowers and Insects — Labiate. 121 
They are purplish and are arranged in a verticillastrate- 
spicate or capitate inflorescence. They are adapted to bumble- 
bees, although often visited by other long-tongued bees and 
by butterflies. The plant blooms from July 6 to Oct.9. On 
8 days, between July 11 and Sept. 2, the following list was 
observed: — 
Hymenoptera —Apide: (1) Bombus virginicus Oliv. ¢'8 ; (2) B. separatus 
Cr. @; (3) B. vagans Sm. 8; (4) B. americanorum F. §, ab.; (5) Clisodon 
terminalis Cr. §'9; (6) Melissodes bimaculata Lep. 9; (7) Ceratina dupla 
Say 2; (8) Megachile mendica Cr. j'—all s.; Andrenide: (9) Augochlora 
pura Say ©, ad (10) Halictus fasciatus Nyl. 9, c. p.; Scoliide: (11) Scolia 
bicincta F., 
seioadins beeec: Sihewiite ocera: (12) Pieris rape L.; (13) P. protodice B. 
L.; (14) Colias philodice Godt.; (15) Pamphila peckius Kby.; (16) P. cernes 
Boks: ; (17) P. otho S. and A., var. egeremet Scud.; (18) Pholisora hay- 
hurstii Edw. — all s. 
Diptera — Bombylide; (19) Exoprosopa fasciata Mcq.; Tachinidw: (20) 
Jurinia smaragdina Mcq. — both s 
The following table gives the results of the observation of 
Brunella vulgaris in widely separated localities: — 
ae P 
ie A 
gli@liSigisei. 
StETS (= 131 & 
B/Sisislsie 
SiSi|2ialala 
n Low Germany — Miller (ae es eae APG oe ee Sore Be, 
nse Alps — Miiller.. eowrere 5 10} 1 j 16 
On the Pyrenees — MacLeod a pn: pr uare 7 2 4.9 
In Illinois .... 4(4;,2 7 {27 20 
Physostegia Virginiana Benth. — This is by far the most 
handsome of the native Labiates, blooming from July 19 to 
Oct. 10. The stems rise from 5 to 10 dm., being terminated 
by one simple spike or by several spikes collected in a panicle. 
The flowers are cataleptic,* so that when turned in any direc- 
tion they remain in the same position until disturbed. Prof. 
J. M. Coulter f has observed that this movement is of advan- 
tage in a driving rain by turning the mouths of the flowers 
away from the rain. As pointed out in the Bot. Gaz. XIII., 
* See Bailey: Bot. Gaz., VII., 122. 
} Ibid. 111, 
