4 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
in the monegraph and the modification of it in the paper on Cana- 
dian mosquitoes. 
KBY TO THH TRIBES AND GENERA OF THE MOSQUITOES OF THE UNITED STATES, 
Metanotum witha tut of setae! 22 Sass ee ee ee ee Tribe Sabethini, 
Genus Wyeomyia Theobald. 
Moe taro tum rtrd eee a A eg ae Tribe Culicini, 
1. Wings with the second marginal cell less than half as long as its 
petiole 2224 > Bee et SEB erie REIL St, 19 Ek TESS eee ae 2 
Wings with the second marginal cell over half as long as its petiole____ 3. 
2. Proboscis rigid, down curved__-_Genus Megarhinus Robineau-Desvoidy. 
Proboscis flexible, normal_______ Genus Uranotaenia Lynch Arribalzaga. 
3. Scutellum rounded, not lobedia= 2) atte wai Genus Anopheles Meigen. 
Scutellumypaisthin célys trill(oloe ss eee eaa eee wil Benicia ae eee 4, 
4. Cross veins tending to lie in line, the posterior close to the anterior, or 
mesonotum with bare impressed discolorous lines, or both. 
Genus Culiseta Felt. 
Cross veins normal; mesonato] integument without impressed discolorous 
DUNT OS Mea he 2 2 Ey BS Ae Ta ee TH WS Ree ENCE Se SD oi a D. 
5. Fourth joint of fore tarsus very short__Genus Orthopodomyia Theobald. 
Hourth joint of fore. tarsusslonger normal 222s = een eee ee 6. 
6. Second joint of antennae very long in both sexes, those of the male simi- 
lar\toithe:female: 12 ha ue fil cutie ele Se Genus Deinocerites Theobald. 
Second joint of antennae short; antennae of male dissimilar to those 
Of the tem alent ose A meee AOE Sa eelis aed ie yah 5 008 ohne ee 1 
7. Abdomen of female blunt, with short cerci; hypopygium of male with 
the side pieces curved down, or shortly projecting_________________ 8. 
Abdomen of the female pointed, cerci exerted; hypopygium of male with 
the side pieces prominently projecting, straight____________________ 9. 
SWAN SEales pia ENO wp ok ONT ah ee ae ee ee Genus Culex Linnaeus, 
Wing scales distinctly large and bread______ Genus Mansonia Blanchard, 
9. Abdomen of female with the eighth segment wholly retractile, nude; 
male claspette with multiple terminal appendages. 
Genus Psorophora Robineau-Desvoidy. 
Abdomen of female with the eighth segment only partly retractile; male 
claspette with only a single appendage, or claspette wanting, 
Genus Aedes Meigen, 
Tribe SABETHINI. 
The mosquitoes of this tribe are almost wholly tropical. Their 
larvae live in the water that collects in plants, either living or dead, 
such as the leaf bases of Bromeliaceae, flower bracts of Heliconia, 
cavities in tree trunks, cocoanut shells, cacoa shells, and palm spathes. 
In some instances this water is rendered thick and gummy by the 
exudations of the plants, and in others it is foul and opaque. Two 
species occur in the United States in Bromeliaceae, and a third in 
the pitcher plant, with a northern distribution. 
Genus WYEOMYIA Theobald. 
Wyeomyia THEOBALD, Journ. Trop. Med., vol. 4, p. 233, 1901. 
Phoniomyia THEOBALD, Mon. Culic., vol. 3, p. 311, 1903. 
