206 
Psyche 
[December 
nature. Prospect shafts and permanent swampy areas are 
included in the first category while the surface pools found 
in the moss and in the “niggerheads” are included in the 
second category. 
The larvae found to be peculiar to the permanent breed- 
ing areas represented two species, Culiseta alaskxnsis and 
Culex apicalis. The larvae of the first species appeared dur- 
ing the latter part of the season having developed from eggs 
laid by the overwintering females. The larvae of the second 
species were found earlier in the season, having developed 
from overwintering eggs. The adults of C. alaskxnsis al- 
though they were present in great numbers during the early 
part of the season of 1931 did not cause any great annoyance 
to the workmen. 
The following species appear to be represented in the 
material collected during 1931 : 
TABLE I 
1. Anopheles maculipennis Meigen 
2. Culiseta alaskxnsis Ludlow 
3. Culiseta impatiens Walker 
4. Aedes diantxus H. D. and K. 
5. Aedes communis Felt and Young 
6. Aedes fitchii H. D. and K. 
7. Aedes punctor Kirby 
8. Aedes aldrichi Dyar 
9. Aedes cyclocer cuius Dyar 
10. Aedes leuconotips Dyar 
11. Aedes impiger Walker 
12. Aedes aboriginis Dyar 
13. Aedes stimulans Walker 
14. Aedes cataphylla Dyar 
15. Culex apicalis Adams 
16. Eucorethra underwoodii Underwood 
17. Chaoborus trivittatus Loew 
18. Corethra sp. 
Adult 
Larva and Adult 
Adult 
Larva 
Larva and Adult 
Larva 
Larva and Adult 
Larva and Adult 
Larva 
Larva 
Larva 
Larva and Adult 
Larva and Adult 
Adult 
Larva and Adult 
Larva and Adult 
Larva 
Larva and Adult 
