Jan., '06] ENTOMOLOGICAL NEWS. 



from floating away with the tides by means of stakes driven 

 into the ground. When the monthly high tide reached the 

 pool, water covered the mud within the box by seepage from 

 below, the top being above high tide water, and in due time 

 wrigglers would appear inside the box as abundantly as in the 

 pool outside. These experiments, and the fact that through- 

 out the season larvae appeared in such situations only, con- 

 vinced me that Culex curriei lays its eggs in mud by preference, 

 if not exclusively. 



I have negative evidence to the effect that this species win- 

 ters in the egg state, but space here wnll not permit of an 

 account of this. During the past year (1905) the eggs first 

 began to hatch in February, the first larvae appearing on the 

 2oth. Despite the fact that no adults were seen after April, 

 due to the effective control work, larvae appeared in these tem- 

 porary pools in increasing numbers with each high tide until 

 June. There is but one explanation for this, and this is, that 

 the eggs do not all hatch with the early spring tides, the ma- 

 jority of larvae not appearing until the higher temperatures of 

 May and June. 



During the season of 1904, a brood of curriei appeared each 

 month as regularly as the tides from February to September 

 inclusive, making eight in the season. In arid climates like 

 that of California, where the rains cease in the early spring, 

 the, pools along the margin of the marsh depend for their 

 formation entirely upon high tide water, consequently in the 

 control work of the past summer it was only necessary to visit 

 the marshes once each month, during the week of full moon, 

 to find all the wrigglers that would appear for that month. 



This species was also found to be migratory, and in 1904 was 

 found in the hills toward the ocean, ten miles from its breed- 

 ing ground, along the bay shore. It is hardly necessary to 

 add that this species is a strictly salt marsh form in this sec- 

 tion, and is the most abundant and annoying mosquito of the 

 Bay region of California. 



How doth the busy little bee 

 Improve each shining minute? 



By flying 'round the can to see 

 The good things that are in it. 



