1923] 
Flower Visits of Insects 
167 
19 yellow and four red. Before July they prefer Mis, Pol, white 
and yellow; after June, Mis, Mas and yellow. The maxima 
shift from AB 50.5 to B' 86.2, Mis 60.7 to Mas 50.0, white 56.9 
to yellow 56.8. 
Prosopididce . — Of 166 visits to 74 flowers, 61.4 per cent are 
to Mis, 24.7 to Pol, 68.6 to white, 34.9 to Umbelliferse, 16.8 to 
Compositse and 12.6 to Rosacese. Visits to red are 0.6 per cent, 
Berlin Garden 32.5, Low Germany 36.7. Eight prefer Mis, and 
one Mi. Before July they prefer Mis, Pol, white and yellow; 
after June, Mis, Pol and white. The maximum shifts from A 
40.5 to B' 31.2. 
Colletidce . — Of 140 visits to 89 flowers, 52.1 per cent are to 
Mis, 15.0 to Pol, 50.0 to white, 39.2 to yellow, 14.2 to Umbelliferse 
and 37.1 to Compositse. Seven prefer Mis, four Mi, three Mas, 
seven white, five yellow and three red. Under Mas the females 
show 22.0 per cent, while the males show only 8.6. Before July 
there is a maximum of 34.3 under B, after June it changes to 58.7 
under B'. 
Long-tongued Bees . — Of 3061 visits to 370 flowers, 37.7 per 
cent are to Mas, 22.1 to Mis, 34.0 to red, 31.4 to yellow, 10.5 to 
Leguminosae and 30.3 to Compositse. Of the flowers visited 
and visits Ma shows 32.4 and 23.6, while Mas shows 22.4 and 
37.7. Visits to red in the Berlin Garden are 60.4, in the Alps 
63.3. Seventy prefer Mas, 31 Ma, 11 Mi, 60 red, 43 white, 43 
yellow. Before July they prefer Mas, Ma, Mis and red; after 
June, Mas, Mis, yellow and red. Visits after June show the 
preferences probably better than the general visits because the 
majority of long-tongued bees are late. The maxima shift from 
Hb 43.0 to B' 46.9, Ma 31.5 to Mas 56.9, white 43.5 to red 37.8, 
Of the visits of the polyleges 32.5 per cent are to Mas, 30.8 
to Ma and 37.0 to red; of the inquilines 38.4 to Mas, 36.3 to 
Mis, 35.8 to yellow and 40.4 to white; of the oligoleges 68.2 to 
Mas, 45.5 to yellow and 36.2 to red. The polyleges show the 
highest percentages to Ma and red, the oligoleges to Mas and 
yellow, and the inquilines to Mis and white. The oligoleges show 
the highest percentage of visits to social flowers, 86.0, and the 
polyleges to non-social 43.9. Forty-two prefer non-social 
flowers. Non-pollinating visits (66) show for Ma 68.1, Mas 28.7 
