58. 
61. 
AISC. PUBLICATION 336, U. S. DEPT. OF AGRICULTURE 
Tibiae and tarsi almost entirely dark-scaled; dark portions of femora 
not speckled with white; abdominal tergites with lateral pale spots____ 
Tibiae and first segments of tarsi pale on one side for nearly their en- 
tire length; dark portions of femora speckled with white; abdominal 
segments sometimes with basal pale bands that widen laterally. 
[Mesonotum broadly pale-scaled for its full length on each side, the 
disk also with pale scales; posterior pronotum with lanceolate scales. ] 
Rare in Southern Statesi 22 2) st saiSee e Aedes sticticus 
. Posterior pronotum densely covered with broad, appressed, white scales; 
mesonotum with silvery-white scales along sides, the median area 
broadly dark-scaled (fig. 12, F). A common woods species, breeding 
in-tree holes. =. 2S ee eee Aedes triseriatus 
Posterior pronotum with lanceolate scales, not closely appressed; meso- 
notum with broad patches of yellowish-white scales anteriorly, reduced 
to narrow lateral stripes posteriorly by an abrupt widening of the 
median dark-scaled area (fig. 12, D). A fairly large species, usually 
1} 0 ¢ pee pene 2 Meena ees OR oN ee AE, Oe ee LI Nh Be Aedes thibaulti 
. (48) Hind legs without markings; segments 3 to 5 of midtarsi white on 
one side. The pitcherplant mosquito, rare______ Wueomyia smithii 
Hind-tarsal segments with basal spots or streaks of white scales under- 
neath; midtarsi as in W. smithii. Two species found in the United 
States only in southern Florida, breeding in the water in air plants 
(Bromeliaceae) —_____ SNe YEAS A SRN Ree ee 
Anterior pronotal lobes silvery- senlede sersne howe Wyeomyia vanduzei 
These scales darker, with purplish reflections (difficult to distinguish 
from: the preceding) 2 4 Wyeomyia mitchellii 
KEY TO DARK-LEGGED SPECIES OF CULEX BY MALE TERMINALIA ° 
. Tenth sternite with an apical tuft of short bristles or spines; sub- 
apical lobe of sidepiece not divided________ > _»__ Subgenus Culex 
Tenth sternite comb-shaped apically, with a row of short, stout teeth___ 
. Subapical lobe of sidepiece with eight appendages; base of tenth sternite 
produced laterally into a blunt point or a short, nearly straight arm____ 
Subapical lobe with five or six appendages; base of tenth sternite pro- 
duced into a long, stout, strongly curved arm. =. 
. Ventral arm of mesosomal plate long, ribbonlike, curved sharply out- 
ward toward sidepiece at about the outer third and tapered to a point; 
dorsal arm slender, pointed, lying more or less parallel with the inner 
margin of the ventral arm and extending little if any beyond the curved 
shoulder..of this: arms 2-25.25 ie Ba le Culex quinquefasciatus 
Ventral arm of mesosomal plate of same general shape as above but some- 
what shorter; dorsal arm broader, semicylindrical in appearance, with 
a truncate, slightly upturned tip; this arm placed obliquely, usually 
extending to or toward tip of ventral arm__________ Culex pipiens 
. Mesosomal plate with two arms and with a median row or group of four 
to seven short, stout teeth________________ to 2} ed eel aes ee 
Mesosomal plate without a median row of teeth, the processes consist- 
ing of a short lateral arm and a longer posterior arm, which has a 
small tooth near the base. (Subapical lobe of sidepiece with three 
rods,-a Jeaf, and-two setae) as 22 2ss Stas ________ Culex restuans 
. Dorsal arm of mesosomal plate short, bent in middle at a right angle 
(thumblike), with a pointed tip; subapical lobe of sidepiece with three 
rods, a leaf, and two setae: spines of tenth sternite all sharp- 
pointed... 34S) 3. ee _Dae i eee ee ee Culex salinarius 
Mesosomal plate with a stout, straight, dorsal arm from near base; lobe 
of sidepiece with only one seta after the leaf (apically); spines on 
one side of tuft of tenth sternite short and bluntly rounded 
Culex nigripalpus 
. Subapical lobe of sidepiece with distinct divisions; comb-shaped portion 
of tenth sternite bent inward nearly at right angles; mesosomal 
plate with a long, curved basal arm, directed ventrally (basal hook) 
Subgenns Melanoconion 
59 
61 
wo An 
7 
5Tllustrations of these structures have been omitted, on the assumption of some famili- 
arity with this specialized subject on the part of those using this key. 
