arr. 1, MOSQUITOES OF THE UNITED STATES—DYAR. 47 
14. 
15. 
16. 
Lif 
18. 
19. 
20. 
23. 
24. 
hexodontus Dyar. 
Spine of basal lobe stout--__------------------------ cyclocerculus Dyar. 
leuconotips Dyar 
punctor Kirby. 
Spine of basal lobe slender__---------------------------- aboriginis Dyar. 
fisheri Dyar. 
Setae on apical lobe more or less well developed; filiament of claspette 
WATHOUGE LELLOSG. SP Cn aaa ae 2 ee ee ea 16. 
Setae on apical lobe practically absent; fila- {(infirmatus Dyar and Knab, 
ment of claspette with retrose spine. trivittatus Coquillett. 
(Group Scapularis.) thelcter Dyar. 
Setae on apical lobe more or less distinctly outwardly directed when the 
lobe is retracted, not functioning as organs or prehension, tending to obso- 
VeScen Cee 2 8 Ss oe Be eh ee ee (Group Impiger) 17. 
Setae on apical lobe inwardly directed, often distinctly functional, though 
occasionally obsolescent-==—— == ee (Group Stimulans) 19. 
impiger Walker. 
Apical lobe of sidepiece nearly bare_____----- cataphylla Dyar. 
niphadopsis Dyar and Knab. 
Apical lopeqorusideprece distinctly Setose=— = Saas ee 18. 
Setae on apical lobe stouter than adjoining ones_____-----~_ prolixus Dyar. 
lazarensis Felt and Young. 
| altiusculus Dyar. 
These setae not stouter than adjoining ones___. masamae Dyar. 
tahoensis Dyar. 
pionips Dyar. 
Basal lobe of sidepiece without a spine or tuft of setae, flat; apical lobe 
VAS OLSpaVOVEL Pr DOOR OAT Ley rey sie Rae a ee ee eee 20. 
Basal lobe with a strong distinct spine, free; accompanied by few setae; 
lobe, fat apicak lobey with, normal seta eis aes ae ieee 2 22 
Spine of basal lobe strong or weak, accompanied by many setae; basal lobe 
conical; apical lobe with short, slightly thickened, somewhat curved 
SSE EEL ee rae ae a Re a OR 25 
Rugose area of basal lobe reaching up to apical lobe_---- excrucians Walker. 
This area not reaching beyond middle of sidepiece___________________-- mAs 
. Filament of claspette angularly expanded beyond middle; spines of ninth 
tercitesplon gers ca ws Sets Ea ee oe Se ee increpitus Dyar. 
Filament of claspette angularly expanded toward base, spines of ninth ter- 
Pitesmshoriers 2s 5. oe A ee eee mutatus Dyar. 
. Basal lobe rugose nearly to apical lobe; filament of claspette angularly ex- 
panded wat basalitiind 2s a4} ess ee ee ee flavescens Miiller. 
Basal lobe round, not longer than broad, rugose; filament of claspette ex- 
Dandedeatimid dieses 5256s sb Ula Soe ee eee ee Oe ee 23. 
Basal lobe a small setiferous area next to the spine; filament of claspette 
thickwaneolarivyebent in) middle: = cantator Coquillett. 
Setae of apical lobe coarser than the ordinary vestiture__mississippii Dyar. 
Setae of apical lobe about the same size as the vestiture_______________ 24. 
Setae of apical lobe distinctly weaker than the vestiture_____ albertae Dyar. 
Setae of apical lobe very small and short__---~_-_--______ mercurator Dyar. 
Claspette filament long, slender and pale with an angle beyond the middle. 
stimulans Walker, 
Claspette filament moderately long, thick and dark, roundedly swollen near 
Phen Glee s a  l® S pe ten classicus Dyar. 
