PART III. | THE MECHANISMS OF FLOWERS. 167 
hermaphrodite flowers owing to the wide separation of the stamens 
and pistil. Like all other flowers of a dull yellow colour they are 
almost completely avoided by Coleoptera. 
Visitors: A. Diptera—(a) Syrphide : (1) Helophilus floreus, L., very ab. ; 
_ (2) H. pendulus, L. ; (3) Syritta pipiens, L., very ab., all three s. and f.p. ; 
_ (6) Muscide : (4) Calliphora erythrocephala, Mgn. ; (5) Sarcophaga carnaria, 
L. ; (6) Lucilia cornicina, F., s., also several undetermined flies and gnats. 
B. Coleoptera—Dermestide : (7) Anthrenus pimpinelle, F., licking honey. 
_C. Hymenoptera—(a) Tenthredinide: (8) Tenthredo marginella, Kl.; (0) 
Sphegide: (9) Oxybelus uniglumis, L.; (10) Gorytes campestris, L. ; (c) 
_ Vespide: (11) Eumenes pomiformis, Spin.; (12) Odynerus sinuatus, F. ; 
_ (13) O. spinipes, H. Sch. (quinquefasciatus, F.), the last six all licking honey ; 
iF (d) Apide: (14) Andrena albicans, K. 9, c.p.; (15) Halictus sexstrigatus, 
Schenck, 2; (16) H. sexnotatus, K. 2; (17) Apis mellifica, L. %, the last 
three sucking honey. 
ee 
‘ie 89. Ruus typHina, L.—I have had little opportunity of 
watching the flowers of this plant at the proper season. They are 
very conspicuous, and secrete abundant and easily accessible honey, 
and the possibility of self-fertilisation is excluded by diccism, I 
have as yet only observed the following visitors :— 
| A. Hymenoptera—Apide : (1) Apis mellifica, L. $, very ab., s.; (2) 
_ Prosopis communis, Nyl. 2 ¢,s. B. Neuroptera—(4) Panorpa communis, L. 
licking honey. 
According to Delpino, many species of Rhus are > proterandrous 
and fertilised by flies (177). 
Orv. CORTARIEZ. 
17 Coriaria myrtifolia, L., is markedly proterandrous, according to 
| _ Hildebrand, and the first flowers are male only (356). 
Orv. LEGUMINOS. 
Tribe Lotee. 
90. Lorus cornicuLatus, L.—The structure of the flower of 
__ Lotus corniculatus is described briefly by Delpino (172, p. 25). He 
; - gives it as an example of a papilionaceous flower furnished with 
{ a piston-apparatus, and he subsequently compared it fully with 
i; Coronilla Emerus (178, pp. 39-44). I have devoted especial 
te 1 attention to the fertilisation of these plants, and I shall discuss 
_ their structure fully. 
