CUUCID.-E. IO? 



CORETHRIN^. 



1. Hind metatarsi shorter than the following joint {Corethra* Coquil- 



lett) . (fig. 29) . . . . . . Mochlonyx. 



Hind metatarsi longer than the following joint. ... 2 



2. Small species; ungues simple. ....... 3 



Large species (10 mm); ungues bifid. . . . Pelorempis. 



2. Antenna; verticillate {Sayomyia Coquillett) (7). Corethra. 



Antennae of male thickly clothed with long hairs; of the female 



with a basal and an irregular median circlet of hairs on each 



joint Corethrella. 



CULICIN^E. 



AFTER DYAR AND KNAB. 



i. Metauotum without setae (Culicini) 2 



Metanotum with setae (Sabethini). ..... 15 



2. Scutellum evenly rounded, not lobed. ..... 3 



Scutellum distinctly trilobate. .....: 4 



3. Second marginal cell longer than its petiole (fig. 31) Anopheles. 

 Second marginal cell less than half as long as its petiole (1, 2) . 



Megarhinus. 



4. Hind tibiae near their tip with a row of seven to twelve closelv 



set setae. .......... 5 



Hind tibiae with none to five sparsely set setae. ... 14 



5. Scutellum with its median lobe elongate, collar-like, not tubercu- 



larly prominent, .... ..... 6 



Scutellum with its median lobe distinctly prominent and tuber- 

 cular. ........... 7 



6. Terminal antennal joints slender, long. . . Mansonia. 

 Terminal antennal joints short, broad. . . . Aedomyia. 



7. Second joint of antennae very long, 14:1. . Deinocerites. 

 Second joint of antennae moderately long, less than 8:1. . 8 



8. Second marginal cell less than half as long as its petiole. 



Uranotaenia. 

 Second marginal cell at least nearly as long as its petiole. 9 



* My examination of the literature leads me to quite different con- 

 clusions than those of Coquillett regarding the types of Corethra and 

 Mochlonyx. There is no call for disturbing these names so long es- 

 tablished. 



