How Far Mosquitoes Fly 49 



slowly advancing until, a favourable night happening, 

 the ever-increasing swarm arose and next morning had 

 settled along the first ridge of the mountains. The 

 second brood, maturing during the last days of June, 

 was watched in the same way and the early days of 

 July, 1903, brought inland the greatest swarm of mos- 

 quitoes I have ever seen. They reached New Brunswick 

 July 2d, and included the three species, sollicitans, can- 

 tator, and tceniorhynchus. Meanwhile Mr. Viereck was 

 observing at Cape May and watched the peninsula filling 

 with sollicitans, bred at the shore ; not a larva of which 

 could he find where the adults swarmed. He noted 

 that after a continuous south wind the marshes became 

 practically free from mosquitoes, and he noted further 

 that a few days later blood-filled specimens with de- 

 veloping or developed ovaries returned to them from 

 the upland. This seemed to him in the nature of a 

 return migration for oviposition, as all specimens were 

 worn and battered." 



The insects, in gradually lessening swarms, were 

 traced to Paterson, Morristown, and Summit. At 

 Great Bay, at the mouth of the Mullica River, Dr. 

 Nelson observed the adults emerging on July 21st 

 and 22d, the males the first day. On the 23d they 

 were mating in clouds at from sixteen to twenty feet 

 up, filling the air with a "peculiar humming noise." 

 Next day the females were biting furiously. For four 

 days afterward they kept in hiding from cold mist 

 and north winds, but on the 28th the wind changed 

 south, remaining so that night and all day on the 

 29th. During the 28th and 29th the mosquitoes 

 departed from the marshes, and Mr. Brakeley re- 

 ported their arrival, on the day immediately follow- 

 4 



