106 
Psyche 
[April 
show a maximum of 88.8 per cent May 15 — June 9. The Col- 
letidse, March 20 — October 30, show a maximum of 46.6 per 
cent June 21, 53 . 3 per cent flying in July and August. 
The Ceratinoidea are represented by two Ceratinidae, 
March — November ,and one of the Xylocopidse, May 5 — July 5. 
The Apoidea, represented by Bombidae and Apidae, fly 
from March to November, with all, except one rare species, 
flying simultaneously June 22-28. The Bombidae fly from 
March 15 to November 4. The females appear in March and 
April, the workers May — July, and the males in July and August. 
As far as pollination is concerned the maximum of the group is 
in August. 
Pygidialia . — The Dasygastrae and Apygidialia form old 
and fragmentary groups characterized by distinct structural 
marks and by discontinuous geographical distribution. To- 
gether they make only 28. 8 per cent of the indigenous bees. On 
the other hand the Pygidialia are 71.1 per cent of the species. 
They are more recent, more plastic, less distinctly separated 
into groups and of a more continuous geographical distribution. 
The Halictoidea, March 17 to November, have a maximum 
of 91.3 per cent June 14-15, 93.1 per cent flying in June. The 
Halictidse, March 17 to November, have a maximum of 94.6 
per cent on June 14-15. Nineteen species have been observed 
in March and 21 in November. Some are so rare that their 
flight has not been made out, but it is likely that all are flying 
simultaneously from June until October. The Dufoureidae are 
represented by Halictoides marginatus, August 27 — October 3. 
The Nomiidse are represented by Paranomia nortonii, June 26 — 
September 9. 
The Andrenoidea fly from March 17 to October 30, and have 
a maximum of 45.5 per cent May 11-13, 57.3 per cent flying in 
May. The percentage declines to 19.1 in July and rises again 
to 32 . 3 in August and September. The Andrenidae, March 17 — 
October 30, have a maximum of 60.7 per cent May 11-13, 70.5 
per cent flying in May. Only one species is flying July 30 — 
August 12, while six are flying simultaneously September 8-20. 
