748 A. BE. Verrill—The Bermuda Islands. 
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 to a 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, ete., 
but it will also bite viciously in the daytime. 
It is recorded by Theobald (Monog. Culicids, 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: Trypeta humilis Loew (Monog. Dipt. N. Amer., i, 
DEATHS FROM YELLOW FEVER IN THE CITY OF HAVANA. 
Month, 1892 1893 1895 1896 1897. | 1898 
1894 | 1899 1900 Igor 
January ...| 15 | ib | 9 | 15 |° 10° | “69 7 ae a iea! 
Hebraary.s2| 0) | Gea a4: AY vail otis Memeo LO eae 
Meir Chipes= = i, 5p pgs Aetna wos Pl Big 3 30 2 1 4 1 
Apriles =.=: 8 Shelia 6 14 71 gM Ps 0 0 
Mayet hs 7 | 23 16 10 27 88 4) 0 2 0 
June ._-.--| 13 | 69 ol!) 6 46 | 174 3x | eae 8 0 
Jialye sa ae 27 118 77 88 116 168 16 2 30 1 
August ....| 87 | 100 73 | 120 | 262 LOZ. 1 1G) rs ane 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 | 8d | 244 26 | 13 18 54 0 
December_.| 33 ila) 29) 20 sae Sora 22 20 0 
Total___.| 357 | 496 | 382 | 553 [1282 | 858 | 186 | 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. 
