Robertson — Flowers and Insects — Labiate. 117 
can exhaust it. There is no list of the insects which visit it 
in its native country, Muller having observed only Bombus 
muscorum as a visitor.* It has succeeded in acquiring an 
efficient set in this country, as the following list indicates. It 
blooms from June 19 to Oct. 24. The list was made out on 
ten days, between June 26 and Sept. 10. 
Hymenoptera — Apide: (1) Apis mellifica L. 8, ab.; (2) Bombus vir- 
ginicus Oliv. 8; (3) B. americanorum F. 8; (4) Melissodes bimaculata 
Lep. 2; (5) Ceratina dupla Say 9; (6) Megachile rufimanus Rob. 9, ab.; 
(7) M. pugnata Say ’; (8) M.- relativa Cr. 9; (9) M. infragilis Cr. ¢; (10) 
Alcidamea producta Cr. 2; (11) Heriades sires Cr. 2; (12) Nomada 
incerta Cr. Q; (13) Calliopsis andreniformis Sm. 9; Andrenide: (14) Aga- 
postemon radiatus Say 2; Vespide: (15) Sera fulvipes Sauss.; (16) 
Q. foraminatus Sauss. 
iptera — Bombylide: (17) Authrax parvicornis Lw.; Tachinide: (18) 
Jurinia smaragdina Mcq.; (19) J. apicifera W 
‘Lepidoptera — Rhopalocera: (20) Pieris sivotodigs B.-L.; (21) P. rape L. 
(22) Pyrameis atalanta L. — all sucking. 
Nepeta Glechoma} Benth. (Glechoma hederacea L.) — 
‘* Nat. from Eu.’’ — The flowers bloom before any of our 
native Labiates and, accordingly, show quite a peculiar set of 
visitors. The plant grows in damp woods, the stems being 
prostrate or procumbent. There are two or three blue flowers 
in the axils of the leaves, in which situation they are quite in- 
conspicuous. The corolla approaches the typical Labiate 
form, the stamens and pistil being protected by a well devel- 
oped galea. The pollen is dusted very definitely upon the 
tops of the heads of bumble-bee females, which are the nor- 
mal visitors, or upon the upper part of the thorax of small 
bees. Butterflies occur as intruders, being quite uncertain to 
touch the anthers and stigma. The list shows a striking 
resemblance to the German list observed by Miller, 
the species being replaced by American species 
of the same genera. The genera Synhalonia, Alcidamea, 
und Augochlora, being American, could not occur as 
visitors in the normal habitat. Miiller vbserved Bombus 
workers in Germany, but I observed only females. I have 
found only the female form, with tubes 8 or 9 mm. long. 
* Alpenblum 
t See Miiller; yoitlisaten of Flowers. 
