OO 
Vol. IV, No. 4.] Notes on the Pollination of Flowers. 231 
[N.S.] 
and is diligent on a great variety of plants most of which are not 
or ranted visited by the species of Xylocopa and Bombus. 
Apis dorsata and Apis florea occurred no higher than 3,000 ft. 
Species of Andrena and Halictus and ore ont bees are 
common on the hills at the higher eleva I do not know 
enough about them to justify any lengthy aon here: Six of the 
Composite received visits from them and five of the Rosacee ; they 
were not uncommon on the little blue Gentiana argentea; in all 
they napa twenty-four species. 
ismatica was seen on Taraxacum officinale and Genti- 
ana ar pigs 
: ie ‘elevations Eumenids were seen and several bees of 
ous genera which, when they could not be caught, are not satis- 
fstonils identified even Lee Z and are only mentioned above 
with notes of interrogatio 
were seen on the flowers of ten different species and a 
all elevations ; but perhaps they are more abundantly present in 
the valleys than on the hill to tops. 
LepipoptEra.—Butterflies are very abundant at the higher 
elevations. Species of Pieris visited the flowers of thirteen differ- 
ent plants, species of Vanessa seven, species of Argynnis four, 
peda eleven, and species of Papilio thr Sphingids were 
aspi, Piloriana, Gentine as Thymus. “h, without doubt, is an 
important insect in flower-fertilisation. Rhingia angusticincta is 
the longest tongued of the Syrphide seen; it occurred from 8,000 
to 9,000 ft. on flowers of Arabis, Viola and ae nsliea. Hristalis 2 
not ascend on the whole quite so high as Rhingia, ranging 
1000 ft. to 8,300ft Species of Syrphus were common with the 
Rhingia, and also of Melanostoma and Platychirus. One Melanos- 
toma was found as low down as 4,000 ft. It is worthy of remark 
that the Syrphids visited = many white flowers and few intense- 
ly coloured flowers ; but that may be a a em of the large 
numbers of pale flowers offering honey to them 
One am Empid was se 
ort-tongued flies are ok very abundant. There are a few 
Muscids and Tachinids, and some Lae but not the enor- 
mous Laat ae that I have been accustomed to in my work 
in the Gram 
Coie erie were sparingly present in the flowers: they were 
taken on nine plants. 
Thrips was taken on two. 
The butterflies and the flies are, just as the ae is, <tomgine 
ope but the proportions of the insects above ost unlike 
what itis in spring, or indeed at any season, in (iiitain, 
ee 

_ 1 Vide Annals of Scottish Natural History, 1903, p. 29. 
