10 
15. 
. Tarsi with white rings at both ends of the joints_| 
PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
coronator Dyar and Knab, 
thriambus Dyar. 
Parsi CnDAN Ged! Sessa Bik: Se a ie ae 2a eee weet 2 5. 
. Abdomen with apical segmental white marking____testaceus van der Wulp. 
Abdomen with white marking basal on segments or absent___________.____ 6. 
. Recumbent scales of occiput narrowly curved or lanceolate______________ fe 
These scales at least in part broad and subtruncate___________________ es 
. Mesonotum red; abdomen with the bands indistinct____erythrothorax Dyar. 
INOESONCOLORGG 222A). fae 2 ee Ce en ee 8. 
. Seales on forks of second vein broad and ovate__-_--_~_ melanurus Coquillett. 
These. scales marrow. Mieuila te. see 8 ee ee ee 9 
: Abdomen with basal segmental, white bands2-2 eee 10 
AS QOTVE TA ITINED Airy Cl er OTS EAN Vis ce 12 
. Band of second abdominal segment triangularly produced_______________ ial 
ef WY AV ESHBL Opa OVD Gas op ea SA (9 SY ole oe ee ee SUN a nee ee territans Walker. 
. Abdominal bands joined to the lateral spots______----__-- pipiens Linnaeus. 
Abdominal bands separated from the lateral spots____quinquefasciatus Say 
. Lateral spots of the abdomen not visible dorsally__-__ salinarius Coquillett. 
THESE SPOS vASID Te VG OTS ally ee eee ee es similis Theobald. 
7, Mesonotumpmoreroryless, colden2 = aees tara ee ee eee 14. 
INT SS 0 AG BUT i Fh TO Vp ea a a Lege a >: 
. Mesonotum bright golden (from Texas) ____------ _----pose Dyar and Knab. 
egberti Dyar and Knab, 
degustator Dyar. 
erraticus Dyar and Knab. 
homoeopas Dyar and Ludlow. 
Scales on! forks of second! vein ligulate-——_=-—_=-—_. —=—-= === == anips Dyar. 
peccator Dyar and Knab. 
Mesonotum moderately golden______________- 
b les PCN ere 2 ONE. LES eee 3 
SESE Se TOV floridanus Dyar and Knab. 
KHY TO THD UNITED STATES SPECIES OF CULEX BY THN MALD GENITALIA. 
(Culex and Choeroporpa.) 
. (Culex) Lobe of sidepiece with three rods, a seta or filament, a leaf and 
AriS@taaeee aie elreee, aca Daag Eo biieies el a DE 2 
This*part>with*additional appendages’ Sian) ere sn ae eile aie ee 4. 
. Mesosomal plate with two broad arms and a central mass of close denticles. 
Group Corniger, 
This {plate NObsso -LORMIeC Gees a2 PSS ae RTS SSE es got eee 3 
. Upper limb of mesosomal plate denticulate___-__---__--___- Group Tarsalis. 
PMhis mb MentiT esa eee bee het ts ae al IS, eee Sed Group Salinarius. 
Mesosomal plate of two blunt teeth____________--___-___- Group Territans, 
. Lobe of sidepiece with three rods, two setae, a filament, a leaf, and a seta. 
Group Pipiens. 
Lobe of sidepiece without a leaf, divided__-_-________--___ Group Coronator, 
. (Choeroporpa) clasper with a horn-like tuft before tip; terminal spine 
UMTPOT MIN ee Be SRR Ee ee ee ee ese eS 6. 
Without this structure; terminal spine generally widened and appendicu- 
Wavte es Sats 2 att ee glee ht ee pe OE EEE 8. 
. Anterior crest of clasper of appressed or consolidated spines____________ he 
THISTEreSst COMPOSE OL) fie) ae S eae eee ee anips Dyar. 
