1924 ] 
Flower Visits of Insects II 
105 
Lower Hymenoptera 2360, aculeate 2111, non-aculeate 2^9 ~ 
Eumenidse 461, Sphecidse 377, Crabronidse 253, Pompilidse 188, 
Vespidse 182, Philanthidae 182. 
Lepidoptera 1195. — Rhopalocera 1065, Papilionidse 324> 
Nymphalidse 312, Hesperidse 305. 
Coleoptera 438. 
Phenology of Anthophilous Insects. 
Bees. 
With a few exceptions bees are the only flower-visiting 
insects which are phenologically associated with flowers. Their 
presence implies the necessary presence of flowers. The com- 
position of the bee fauna for the season or for particular parts 
of the season is determined by the presence of certain kinds of 
flowers. 
Dasygastrse. 
The bees forming the superfamily Trypetoidea differ decided- 
ly from the long-tongued bees in general in forming an earlier 
maximum. They fly from March 21 to October 22 and have a 
maximum of 64.5 per cent July 4, 85.4 per cent flying in June. 
The Stelididse, May 9 — October 18, have a maximum of 83.3 
per cent on June 14. The Megachilidse, March 21 — October 22, 
have a maximum of 69 per cent July 4, 85.7 per cent flying in 
June. The Osmiinae, March 21 — October 18, have a maximum 
of 75 per cent June 16, 90 per cent flying in June. The Megachi- 
linae, May 11 — October 22, have a maximum of 95.4 per cent 
July 4. 
Scopulipedes. 
Apygidialia. — The Colletoidea, March 20 — October 30, 
with a maximum of 54.1 per cent May 29-31, show 62.5 per 
cent flying in June. The Prosopididse, April 20 — October 11, 
