276 ENTOMOLOGICAL NEWS. [June, '08 



fourth August 20-27, and the fifth September 10-15. The 

 broods gradually decreased in numbers of individuals until there 

 were very few to appear in the last brood. The food supply 

 began to get scarce after the second brood, and decaying po- 

 tatoes were added, for which the larvae showed great fondness. 



The second jar, containing the decaying vegetable culture, 

 was left standing uncovered in the insectary all summer. The 

 mosquitoes did not return to it and no signs of Psychodids 

 appeared in it. The water nearly all evaporated, so that by the 

 first of December only a small quantity of water remained in 

 the bottom to keep the grass and weeds moist. 



While rearranging the insect breeding cages on December 9, 

 I was surprised on lifting up the jar containing the culture 

 to see a half dozen or so adult Psychodids fly out of it. The 

 jar was immediately covered and removed to my laboratory. 

 On the following day a few more adults emerged, but by the 

 most careful examination no larvse or pupse could be found. 

 A number of the adults were collected and mounted, while 

 the rest were left in the jar for breeding. The second brood 

 of larvse and pupae appeared during Christmas vacation when I 

 was away and on my return the $ih of January, a great many 

 adults were present in the jar. Some of the adults were again 

 collected and others left for breeding. On the 6th and 7th of 

 January the first signs of larvse were noted. They had just 

 hatched and were extremely small, and unlike the larvse of 

 the other species I have observed, were very sluggish. The 

 first pupae from this brood of larvse were found on the I5th of 

 January and adults began to emerge on the i6th. Only three 

 broods of this Psychodid were reared ; the adults appearing 

 Dec. - - to Dec. 9 ; Dec. - - to Jan. 6 ; Jan. 16 to 25. Stragglers 

 from the last brood continued to appear until the middle of 

 February and a few specimens again appeared the last of 

 March. 



Returning to the first species, which was bred between June 

 15 and Sept. 15. I find, on comparing it with Ps. f I or idle a* 



*Trans. Amer. Ent. Soc., Vol. xxxiii, pp. 316 and 324. 



