EXPERIMENT STATION EEPOJIT. G21 



Larvrp of the first brood were then observed, but no espeeial notes 

 were made as to kinds or proportions. 



May 10th and 11th were spent in laying ont the ditch system 

 with ]\[r. Kichards, and a very hirge number of larva? and pupa*, 

 forming brood 2, was observed. This brood hatched about INIay 

 15th, and was followed along the Elizabeth river, through Eliza- 

 beth, Aldene, Salem, Thiion, Springiield and Maplewood, which it 

 reached May 21st. The brood may have reached Summit and ex- 

 tended even further inland, but was not followed lieyoiid the First 

 mouutains. It was caniator almost entirely. 



June 1st, after a ]>eriod of low tides, many pools were dry on 

 even the undrained meadow, and a large portion of brood Iso. 3, 

 which was then in the first larval stage, was killed off. The entire 

 night was- passed on the meadow with Mr. Erhard, and 278 mos- 

 quitoes — 130 cantatoT, 148 sollicitaus — were captured biting. The 

 object was to determine the queistion of the hours at wdiich the 

 insects were most active, and the following table shows that clearly. 

 All the specimens were those attacking Mr. Brehme only, and the 

 fact that there were so few shows in itself how much better condi- 

 tions were than in past years, when counting woaild have been im- 

 possible. The night, it should be said, w^as warm and without 

 wind : 



Between the hours — ■ Cantator. SolUcitans. 



5-6 P. M 16 9 



6-7 " 2.3 19 



7-8 " 30 27 



8-0 " 13 14 



9-10 " 5 7 



10-11 " 1 1 



11-12 " 2 



12-1 A. M 1 



1-2 '• 2 



2-3 " 2 



3-4 " 1 3 



4-5 " 14 20 



5-6 " 22 46 



130 148 



It appears, therefore, that as between the two, solUcitans seems 

 to have a period of rest during the middle of the night, but is much 

 more active than caniator in the morning hours. And the proper- 



