29 
Virginia in pools and small streams fed from coal-mine drainage, the 
water of which contains a large percentage of sulphate of iron. 
Culex impiger has been found by Mr. Pratt, of this office, breeding 
in privy vaults in Alexandria, Va., and this species is likely to be the 
one found usually in such places where the water is fouled with decom- 
posing or excreted animal matter. 
Culex taeniatus is said by Dr. Veazie, of New Orleans, to be the 
so-called ‘‘day mosquito” of New Orleans; that is, the form which 
flies and bites in the daytime. This statement is corroborated to a 
certain extent by Dr. St. George Gray, of St. Lucia, British West 
Indies, who writes, under date of August 12 last: 
I have made some observations on the hours at which the different species are 
most industrious, and find that most mosquitoes have regular feeding times. For 
instance, C. teniatus is very vigorous and troublesome in the early afternoon (between 
noon and 3p.m). Then she usually takes a rest, and renews her attacks at 9 or 
10 p.m. During the morning it can be found resting on walls and clothing, particu- 
larly dark-colored clothing, and is easily caught. 
The distribution of the species of Culex in the United States.—In 
preparing Bulletin No. 4 the writer was at pains to borrow all of the 
mosquitoes from the collections of such entomologists as he supposed 
had saved specimens in this family and placed them in the hands of 
Mr. Coquillett for study. The material received was not large, since 
mosquitoes are difficult to preserve satisfactorily in a collection, and it is 
an inexplicable fact that as a rule collectors do not save such extremely 
common things as mosquitoes. Yet he was able from Mr. Coquillett’s 
work on the specimens received and on those already contained in the 
national collection at Washington to show several interesting points. 
As is the case with many other species of Diptera, most of the differ- 
ent forms were found to be very widespread. The whole group has 
little or no faunistic value; that is to say, different climatic conditions 
and other environmental factors do not limit the range of the species 
as they do with those of other groups. It was thus found that some 
of the commoner forms, like @. consobrinus, C. excitans, C. perturbans, 
and C. posticatus, and C. pungens, were found almost all over the 
country, from New England to Texas and even to southern California, 
so that in almost any given locality in the United States one would be 
able to find all of these common species of Culex, with two or three 
species of other genera and possibly two or three other species of 
Culex. Since the publication of the bulletin (No. 4), other localities 
of distribution have been ascertained, and the following list indicates 
such actual localities as have come to our notice. Persons interested 
will observe several points worth noticing in the list which follows. 
Certain species seem to be rare, while others are very common, in 
addition to being widespread. It seems from the list that Culex con- 
sobrinus is a more northern form; that is, it comes nearer being 
restricted to a boreal habitat than any of the other species. It is one 
