336 A. KE. Verrili— The Bermuda Islands. 748 
vious occasions, but if so it may, perhaps, have died out in some 
years during the cool winter months, for it is a tropical species. 
At least the mature winged insects probably all, or nearly all, 
die during winter, while the larve may live through the winter in 
the water-tanks to give rise toa new brood in summer. This will 
account for the cessation of yellow fever here in winter, as in the- 
southern United States, while it may prevail through the whole year 
in more tropical countries. It is largely a nocturnal species and par- 
ticularly fond of concealing itself among furniture, draperies, etce., 
but it will also bite viciously in the daytime. 
It is recorded by Theobald (Monog. Culicide, i, p. 288, 293, pl. xiii, 
figs. 49, 50), as having been collected here in July, 1899, by Dr. 
Eldon Harvey. It is found in nearly all tropical countries, especially 
near the coast. Its range is exactly coincident with the distribution 
of yellow fever. Its habit of concealing itself in close rooms 
and in the cabins of vessels enables it to migrate to all warm countries. * 
The open water-cisterns are ideal places for the breeding of these 
mosquitoes. In the brackish marshes the abundant minnows, gold- 
fishes, eels, and dragon-fly larve tend to reduce their numbers. 
Craneflies or Tipulide, which are not numerous, are yet repre- 
sented by several species, all undetermined except Dicranomyia dis- 
tans Osten Sacken,} originally described from Florida. 
J. M. Jones recorded in 1876 the following additional Diptera, not 
observed by us: Zrypeta humilis Loew (Monog. Dipt. N. Amer., i, 
DEATHS FROM YELLOW FEVER IN THE CIty OF HAVANA. 
Month. | 1892 | 1893 1894 1895 1896 1897 1898 1899 1900 190 
January _- i 15 15 q lay he al) 69 7 1 8 7 
February -_| 10 6 4 4 inane 1 0 9 5 
March _____| 1 4 2 2 3 30 2 1 4 1 
Agora 8 8 4 6 14 71 1 2 0 0 
May, Sey ani 2 23 16 10 Pas 88 4 0 2 0 
Sinmene sees 13 69 31 16 46 174. 3 1 8 0 
Miho = es 27 «| 118 We 88 116 168 16 2 30 1 
August .--.| 87 | 100 73 120 | 262 102 16 13 49 2 
September _| 70 68 76 135 166 56 34 18 52 2 
October...) 54 46 40 102 240 42 26 25 74 0 
November _| 52 28 23 35 244 26 13 18 54 0 
December_.| 33 11 29 20 147 8 13 22 20 0 
Total_.__| 357 | 496 382 553 «| 1282 858 136 103 310 18 
* On page 511, note, it is erroneously stated that Mr. Theobald records only 
Culex from Bermuda. When that chapter was written I had overlooked his record 
of Bermuda as a locality from which Stegomyia fasciata had been received and 
also his determination of Culex fatigans. 
+ Monograph Diptera North America, Part IV, p. 67. 
