1G8 INSECUTOR INSCITI^ MENSTRUUS 



In fact, I think the two are identical, in spite of the geographic 

 discontinuity. The discontinuity seems certain, for I did not 

 take the species in the Feather River region either in 1916 or 

 1920, nor at Crater Lake in 1920, although it was conspicuous 

 in the Lake Tahoe region. I think the colony in the high 

 Sierras is isolated ; but as I cannot demonstrate any differ- 

 ences in coloration, male hypopygium, or larva, I do not think 

 that the form can be separated. The name cataphylla is older 

 and will take precedence over prodotes. 



The larva has four separated and detached teeth on the air- 

 tube beyond the pecten-tuft on one side and two on the other, 

 or three on each side. These detached teeth are evidently 

 somewhat variable in number, but the terminal one is near the 

 end of the tube as in my description of prodotes (Ins. Ins. 

 Mens., viii, 10, 1920). 



The males swarm over open spaces high up, as I observed 

 for prodotes (Ins. Ins. Mens., viii, 10, 1920). At Tahoe Tav- 

 ern a single male was seen over a path in the woods about 

 G p. m. about 10 feet in the air. The sun had not set, but the 

 approaching cool of evening was apparent. Males were also 

 found flying in shaded woods as late as 8.30 a. m., before the 

 sun had penetrated the shadows. 



Additional data are as follows : Summit, Placer County, 

 California, issued from pupa, June 17 and 20, 1920 (H. G. 

 Dyar) ; Tahoe City, California, June 11-20. 1920 (H. G. 

 Dyar). 



Aedes (Heteronycha) hexodontus Dyar. 



I have given (Ins. Ins. Mens., viii, 2G, 1920) reasons for 

 considering this as a distinct species, and not a race of punctor 

 Kirby, to which it is closely allied. The mesonotum is yellow 

 or brown, with the blackish bands variable, often absent, but 

 never assuming the single broad median band characteristic of 

 punctor. The larvae occur in very shallow marshy pools, never 

 in the deep open pools favored by tahoensis. The swarmmg 

 of the males is peculiar. The flight occurs just preceding 

 sunset, for half an hour or more, but ceases as soon as the 

 sun has actually set. The swarms are low down, a foot or 



