96 
Psyche 
[April 
Braconidce. — Of 58 visits of 33 species to 23 flowers, 51.7 
per cent are to Pol, 32.7 to Mis, 58.8 to white, 41.3 to yellow, 
53 . 3 to Umbelliferse and 32 . 7 to Compositse. 
Chalcidoidea, Figitidce, Evaniidce, — Of 85 visits of 33 species 
to 25 flowers, 76.4 per cent are to Pol, 75.2 to white and 78.8 to 
Umbelliferse. 
Tenthredinidce. — Of 27 visits of 14 species to 15 flowers, 
59.2 per cent are to Mis, 33.3 to Pol, 70.3 to yellow, 40.7 to 
Salix and 11 . 1 to Umbelliferse. 
N on-aculeata. — Of 249 visits of 125 species to 62 flowers, 
58.6 per cent are to Pol, 33.3 to Mis, 61.7 to white, 37.8 to 
yellow, 57.2 to Umbelliferse and 20.8 to Compositse. Before 
July 59.8 per cent of the visits are to yellow and 40.1 to white; 
after June 76.1 are to white and 23.0 to yellow. The maxima 
remain under A and Pol, but shift from yellow to white. 
The preference is for flowers with exposed nectar and most 
of the visits are to them in spite of the dominance of other classes. 
So that exposed nectar as a determining condition, is limited to a 
few visits of the most insignificant of hymenopterous pollinators. 
Even then it fails except when the flowers are social. Many 
visitors should probably be left out, being so minute as to be of 
doubtful value, even if all other guests were excluded. 
Lower Hymenoptera. — Of 2360 visits of 335 species to 188 
flowers, 47.8 per cent are to Mis, 37.0 to Pol, 62.9 to white, 
95.5 to social flowers, 29.0 to Compositse and 28.2 to Umbelli- 
ferse. Pol shows 11.1 per cent of the flowers visited. Of 28 
non-pollinating visits 19 are to Mas and 22 to red. Visits to red 
are 7.5 per cent compared with 18.8 for the Alps. Ten prefer 
Mas, 112 Mis, 206 Pol, 240 white and 89 yellow. After June 
the maximum changes from A 40.6 to B’ 36.7. Yellow changes 
from 41 .5 to 25.0. 
Diptera. 
Midaidce. — Two species prefer Pol and white. 
Nemestrinidce. — The single species prefers Mas and red. 
