16 THE FERTILISATION OF FLOWERS. [PART I. 
In further subdividing entomophilous plants, Delpino omits all 
those plants which can be fertilised equally well by insects of various 
orders, and limits himself to forms which he considers to be adapted 
for particular insects. As such he distinguishes :— 
1. Melittophile ; plants adapted for fertilisation by (the larger) 
bees. These have diurnal flowers, with colours and scents attractive 
to man also, partly with concealed honey (Salvia pratensis), partly 
devoid of honey, and in that case with the pollen inclosed within 
the flower and only becoming apparent on special treatment 
(Genista tinctoria). 
2. Micromelittophile ; plants adapted for fertilisation by the 
smaller bees (and very many other small insects). These flowers 
possess quite incomprehensible attractions for their visitors, far 
more than in any other plants (Herminiwm Monorchis). 
3. Myiophile ; plants adapted for fertilisation by various 
Diptera. Their flowers present for the most part dull (yellowish, 
wine-red, speckled) colours, their odour is for the most part disagree- 
able both to man and to bees, and they display either an exposed 
surface of honey or else pollen only for their visitors (Huonymus). 
4. Micromyiophile ; plants adapted for fertilisation by minute 
Diptera. The flower or the inflorescence forms a chamber with 
a narrow entrance, often a temporary prison for the fertilising 
agents ; honey is produced as a thin adhesive layer, or may be absent, 
in which case the pollen is abundant (Aristolochia Clematitis, Arum). 
5. Sapromyiophile ; plants adapted for fertilisation by carrion- 
flies and dung-flies. The flowers have a putrid smell, but the 
other characters of the group resemble those of the Myiophil 
(Stapelia, Rafflesia). 
6. Cantharophile ; plants adapted for fertilisation by beetles. 
These are large diurnal flowers of striking colours, affording con- 
venient shelter, and containing an exceedingly large supply of 
pollen besides occasionally some easily accessible honey (Magnolia). 
7. Psychophile ; plants adapted for fertilisation by diurnal 
Lepidoptera, These have brightly-coloured diurnal flowers, whose 
honey is concealed at the base of a very narrow tube (Dianthus). 
8. Sphingophile ; plants adapted for fertilisation by Hawk-moths 
(Sphingidw) and Noctue. These have light-coloured nocturnal 
flowers, with a strong sweet scent, whose honey is concealed at 
the base of a very long tube or spur (Lonicera Caprifoliwm, 
Platanthera)+ 
' Since the above was written, Delpino has completed his work, Ulteriori osser- 
vazioni sulla dicogamia nel regno vegetale, and in it the contrivances by which 
