SB 
818 
C5768 
ENT 
6. 
~J 
No. 72. 
_.ilted States Department of Agriculture, 
BUREAU OF ENTOMOLOGY, 
L. O. HOWARD, Entomologist and Chief of Bureau. 
KEY TO THE KNOWN LARVE OF THE MOSQUITOES OF THE 
UNITED STATES.! 
By HARRISON G. DyAR. 
. Larvee without a distinct air tube, the air hole with flaps but no elongated 
sides ; floating at surface of water in a horizontal position. The malaria 
COVA EIS 5 eae ele ee ne Subfamily ANOPHELIN®____ 3 
Larvee with a distinct elongated air tube; floating below the surface of water, 
Hswaliviobliquelv shanmine: bDyothe tule 2: -=22 3 eee 2 
. The last segment, beyond the air tube, with a ventral brush or rudder in the 
middle of the segment behind —------ > Subfamily CULICINA____ 6 
Last segment without a median brush, the hairs paired on the two sides, 
MOneson mid =ventraleines=—- 85 ss ss Subfamily SABETHIN 
Only one species, in leaves of pitcher plants in cold bogs. 
Wyeomyia smith Coquillett. 
Abdomen with plumose lateral hairs on the first three segments only; head 
nner MINATO Se? Naansy= 2 oe = Nl ee ee ee eee 1 
Abdomen with plumose hairs to the sixth segment; head without plumose 
hairs. Lives in hollow trees ___--__--_-___- Anopheles barbert Coquillett. 
. Lateral comb (on the eighth segment below the air hole) with one long lower 
tooth followed by fowr little ones ____ Anopheles franciscanus McCracken. 
Lateral comb with one long lower tooth followed by three little ones. 
Anopheles punctipennis Say. 
Lateral comb with the lower long tooth followed by another as long or 
TES O eee een et Oe ee ee ee 5 
Lateral comb with the upper tooth Bjork ~ Anopheles maculipennis Meigen. 
Lateral comb with the upper tooth long___ Anopheles crucians Wiedemann. 
Mouth brush folded outward when not in use, not vibratile, used to seize 
prey only. Predaceous on other mosquito larvee_______________-_-_..__- r 
Mouth brush folding inward, tufted, vibratile, usually continually in motion. 
Feed on microscopic organisms and vegetable detritus _________________ 9 
A plate on the side on the eighth abdominal segment. Only one species, 
living in hollow trees and water barrels; beneficial. 
Megarhinus portoricensis von Roder. 
A patch of small scales on the side of the eighth abdominal segment. Living 
initemporary puddles = beneficial species; ..1 22. 25-222 222 Bl 8 
Labial plate (mentum) of head with the teeth regular andl alien 
Psorophora ciliata Fabricius. 
Labial plate with the next to the basal tooth much enlarged. 
Psorophora howardii Coquillett. 
l1The generic names here used have been made uniform with those of Technical Series No. 11, 
of this Bureau, to facilitate cross reference. In case of discrepancy in specific names, the names 
employedin that publication are given in footnotes, 
