1924] 
Flower Visits of Insects II 
111 
August. The total lower Hymenoptera have a maximum of 
74.5 per cent July 22-27, 80 per cent flying in July and August. 
They are phenologically associated with their food plants or 
with the insects upon which they are parasitic or with which 
they provision their nests. Only the flg chalcids have an im- 
portant relation to any flower. 
Coleo'ptera . — The Coleoptera, March 21 — November 6 
have a maximum of 52.6 per cent June 9, 53.1 per cent flying in 
June. 
Hemiptera . — The Hemiptera, April 7 — October 23, have a 
maximum of 68.4 per cent June 28 — July 8, 78.9 per cent flying 
in June. 
Literature cited. 
1. Knuth, P. Handbook of flower pollination. 1 : 1-382. (1906) 
Transl. of Handbuch der Bliitenbiologie. 1898. 
2. Muller, H. The fertilisation of flowers. (1883). Transl. 
of Befructung der Blumen. 1873. 
3. Robertson, C. Synopsis of Panurgidse. Psyche 29 ; 159-73. 
1922. 
