anriu.] | THE MECHANISMS OF FLOWERS. 375° 
284. V. Myrrituus, L. :— 
_ Visitors: (1) Apis mellifica, L. §, very ab., s.; (2) Bombusagrorum, F. ?, 
; (3) B. lapidarius, L. 9; (4) B. terete, L. 9; (5) B. Scrimshiranus, 
. 2 9, all sucking only. They hung, head downwards, from the corolla. All 
he humble-bees that I observed were females, for the workers scarcely occur 
when the plant is in flower (middle of April to beginning of May). (6) An- 
lrena nigrownea, K. ¢, 1 once found this species, whose proboscis is only 34 
mm. long, endeavouring vainly to reach the honey. 
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___—«-.285._‘V. uLicinosuM, L.—I found all the following insects upon 
- this plant on one sunny afternoon (May 19, 1870) :— 
A. Hymenoptera—(a) Apide: (1) Apis mellifica, L. $, ab. ; (2) Bombus 
terrestris, L. 9, freq. ; (3) B. hortorum, L. § ; (4) B. pratorum, L. ? ; (5) 
_ B. agrorum, F. 9; (6) B. confusus, Schenck, ?; (7) B. (Apathus) vestalis, 
 Foure. ?, freq.; (8) B. (A.) campestris, Pz. 2; (9) B. silvarum, L. 9; (10) 
Andrena nigrownea, K. 2 ¢; (11) A. pilipes, F. ¢; (12) A. fulva, Schrank, 
@; (18) A. Gwynana, K. 9; (14) A. atriceps, K. ¢; (15) Halictus rubi- 
eundus, Chr. 9; (16) H. flavipes, F. 9; (17) H. sexnotatus, K. 2; (18) H. 
eylindricus, F. 2 ; (19) H. sexstrigatus, Schenck, ?; (20) Colletes cunicularia, 
L. 2; (21) Nomada ruficornis, L. 9 ; (22) N. ferruginata, K. 2; (23) Osmia 
rufa, L. 9, all sucking ; (b) Vespidw: (24) Vespa rufa, L.,s. B. Diptera— 
Syrphide : (25) Eristalis arbustorum, L., very ab. ; (26) E. horticola, Mgn., 
arce ; (27) E. intricarius, L., do. ; (28) Rhingia rostrata, L., not unfreq.; all 
four sucking. C. Lepidoptera—Rhopalocera : (29) Lyczna argiolus, L. ; (30) 
 Theela rubi, L., both sucking. See also No. 590, 111. 
—s«- Vaccinium oxycoceus, L.—The structure of the flower was care- 
fully described by Sprengel. It is adapted for bees, but is very 
ingly visited. The flowers last a very long time, according to 
Sprengel, eighteen days, and Sprengel was probably justified in 
i onsidering this fact to be explained by the scanty insect-visits 
je (590, III. ). 
Vaceinium Vitis-idea, L.—The mouth of the corolla is still 
vider than in V. wliginoswm, and the flower is more nearly erect. 
The plant is fertilised by hive-bees and humble-bees (589, 609). 
ia 
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Da. 
&.: Orv. ERICACEZ. 
Tribe Arbutew. 
Arctostaphylos Uva-ursi, Spr. (Arbutus uva-ursi, L.).—The 
flower resembles that of Hrica tetralix in structure, and is likewise 
ees chiefly by humble-bees (609). 
a 
