118 
Psyche 
[August-October 
75.5 per cent flying in May, 64.4 in April, 48.8 in June. Only 
one is flying July 30-Aug. 12, while 6 are simultaneous Sept. 8-20. 
The Nonadidse fly 212 days, Mar. 21-Oct. 19. Twenty species 
fly 129 days, Mar. 27-July 27. The maximum is May 5 when 
there are 14 species flying simultaneously. Three species fly 54 
days, Aug.27-Oct. 19, all together for 25 days, Sept. 8-Oct. 2. 
Forty-five species of Andre nidse and 20 of Nomadidse com- 
plete their flight before August and are evidently related as host 
arid inquiline, but there are so many that it is hard to match 
them. I think Centrias erigerontis, June 17-21, is an inquiline of 
Pterandrena rudheckice, June 10-Aug. 17. C. americanus, Apr. 29 
-July 16, ends when only 3 Andre nidae are flying, Pterandrena rud- 
heckice, Trachandrena quintilis and T . obscura. It begins 42 days 
before any of these, in which time it evidently infests some other 
species. Cephen texanus, July 17-27, probably belongs to Trachan- 
drena quintilis, July 8-29, T. obscura- July 16, or Pterandrena 
rudheckice, which are the only Andrenidse flying at the time. 
Holonomada vincta, Aug. 27-Oct. 2, is probably an inquiline of 
Pterandrena helianthi, Aug. 27-Oct. 10. H. placida, a small spe- 
cies, Sept. 6-Oct. 19, may belong to Pterandrena solidaginis, 
Aug. 13-Oct. 22, or Andrena nubecula, Aug. 13-Oct. 30. Nomada 
vicina, Sept. 8-Oct. 19, is most closely associated in time with 
Pterandrena asteris, Sept. 8-Oct. 21. 
Panurgidce and Pasititidce. — Holcopasites illinoensis, June 6- 
Aug. 23, is probably an inquiline of Calliopsis andreniformis, 
May 30-Oct. 14. Heterosarus parvus and Pseudopanurgus albi- 
tarsis are the only other Panurgidse flying in the early part of 
June. 
Anthophoridce and Meledidce. — Five species of Anthophoridae 
fly 166 days, Apr. 8-Sept. 20, averaging 63.4 days. Excluding 
Emphoropsis floridana, the male observed for 16 days, the average 
is 75.2. 
Bombomelecta thoracica, April 18-May 28, flies during the 
time of Anthophora ursina, April 8- June 22. M electa interrupta, 
taken twice, June 18, July 19, is probably an inquiline of Ame- 
gilla walshii, July 6-Sept. 20. It no doubt flies much later than 
Anthemcessa abrupta, May 7-July 29, and Clisoden terminalis, 
May 25- July 27. 
