256 Annals Entomological Society of America {[Vol. VIII, 
a mosquito from the standpoint of man’s level, rather than 
interpreting its behavior from a dipterous standpoint. 
L. LIBERATED AT SALT-MARSH, 1913. 
| | WIND 
Date | Number} Liberated Color l 
Dir. | Vel. | Trend 
Jan. 21 3,000 9:00 p. m. (Gr Whe N 14 decreasing 
i AD, 3,000 S00 *“ zs | N 11 a 
ty 23 3,000 9:00 “ ,: | N-E 4 4 
: 24 506 e00>2 7 N 11 
« OA 3,000 | 9:00 « ‘ N gaa “ 
25 3,000 9:00 * i N 7 | increasing 
eer 500 Ayame fh W | 5 | decreasing 
eee 4,000 8:00 “ EO W eI 3 
Coen J29 500 5:45. “ s N 19 | : 
patos!) 3,000 8:00 “ ‘i N 17 . 
eure.) 500 aye tay ee 2 wei 14 | ; 
bf 00) 2,000 8:00, 05 ape 10 : 
te yas 2,000 8:00) 37 * Neo 208 « 
Feb. 1 2,000 $:00255 * N 6) S 
3 2,000 8:00) == W 5 s 
s 4 2,000 (45 eS x N 1S) 7 
5 2,000 7:45 “ N 16 | F 
‘ 11 1,200 6:15))>% ‘ N 12 = 
Total liberated, 37,200. G. V.=Gentian violet; Eo=Eosine. 
The above table shows that the actual ideal was not fol- 
lowed, i. e., all liberations should have been done before 6:00 
p. m.:. Howéver, it will’be seen from the data ‘of recovered 
mosquitos, that the first colored ones found were on the 24th 
of January, and the first lot of colored mosquitos liberated 
was on the 2lst. But these did not participate in the flight to 
Gatun until the evening of the 22d. Therefore, they entered 
the buildings either that same evening or the next day. In 
future experimentations of this sort, marked mosquitos should 
be liberated just when the flight is to commence. 
All mosquitos caught in Gatun and New Gatun and 
occasional lots from Spillway Camp, New Frijolles, Monte 
Lirio and Camp Purdum, were tested for color, the method 
used being the same as in the author’s previous paper (1913-a). 
Collection of adults was accomplished in the following manner: 
(1) a daily search through all buildings, made by expert negroes 
equipped with a wide-mouth vial containing a cotton plug 
saturated with chloroform; (2) by means of the ‘‘C. H. Bath”’ 
mosquito trap attached to barracks; and (3) by placing mosquito 
