1915} Behavior of Anopheles 229 
The winds at mid-day are hot, strong and steady. Those at 
day-break and dusk are much milder, cooler and often inclined 
to be puffy. 
Two charts, ‘““C’’ and ‘‘D”’ are presented to show the char- 
acteristic of the winds at the hours when the mosquitos are 
most active. These charts give the mileage and direction of 
winds at Gatun for the hours of four to seven a. m., and five to 
eight p. m., during the months of Jan., Feb., and March, 1913. 
CHART C. WINDS, 4-5, 5-6 AND 6-7 A. M. 
a Cc 
i North- 
Mo. | © North Northwest West east | East | sila | Aw 
n mi YP 
ES @|| 0 
Al a b c 2 joy a ib ie Wvasbiec ab ¢|/Ole 
Days} 16 22) 21-10 (Bel MG PA Se SN PAL i cl 1237) 7.7 
Jan. {31} Milesi150 | 200 |184 |72 |26 \29 19 {5 |10 | 6) 3} 2)..|..|..|. 1284] 7.5 
Avr.|| 9 9 9 | 7.2) 4.5) 4. 7)4-5)/2-5)3:.3) 3) 3) 2). 2). .). 1. 9225) 7.3 
Days} 14 13 | 15 |10 /|10 OF Le Ne 12 1 180) 7.0 
Feb. |26| Miles/121 115 {120 |51 (58 |89 |2 |6 14 6 174) 6.7 
Avr.|| 9 OneStat le ole 6 {163| 6.3 
Days|| 23 DON BS | 6S! GP le8 Sahil hemterdta yer |e atest si(~ alpomo| el a 
MaraolieVinles|23cam | e2T08|2Opm|a/on|00. O20 leslie cleeeinciealbete de clecle leaalose 
DNS 255 |p Anta Pa 7 i SOE ah. aes Alicoe [eee allexclisrete sleet Ole 2 
CHART D. WINDS, 5-6, 6-7 AND 7-8 P. M. 
a b c 
§ | 
% North- 
Mo. | © North Northwest West east | East ||| @ | Ay. 
be "a|| © 
a a Boe a bo ¢'|’a BD tc |ab cla b e|O] o 
Days|| 20 19 18 19 WO | 3) 38 | 3) 1)..).2) None |'0|\390)| 12.6 
Jan. /31) Miles/290 |232 /2038 67 |79 fC 28-25 120410). ce “1336 | 10.9 
Avr. || 14.5} 12.2) 11.3) 9 | 9 Selle Suleer ed kO & “1310 | 10.0 
Days] 19 | 19 | 18 6/6 |7 | 1]11}1)Njene | None | 0/826/ 12.7 
Feb. |26) Miles|274 |238 /|198 43 |41 |44 |9)]4/]5 G “1/283 | 10.9 
Avr. || 14.4} 12.5) 10 lade 6 |91415 : “11247| 9.5 
Days) 20 19 18 9 }10 11 2 | 2 | 2 | Nionje | None |:0/496/ 16.0 
Mar. |31| Miles857 (305 {282 |117 |107 |114 |22 /15 |13 y ¢ “11427 | 13.8 
25 |6.5 zs . “1409 | 13.2 
Avr. || 17.8) 16.6} 15.6) 13 | 10.7) 10.4)11 
