GKNUS H.-EMAGOGUS. 485 



Genus XX. HiEMAGOGUS, Willistoii. 



(As limited by Mr. Theobald, Monog. II, p. 238). 

 (Traus. Eut. Soc. Lond. 1896, p. 271, Williston.) 



The essential character of this genus is that while the palpi 

 are short in both sexes, as in ^^des, the one known species 

 has five distinct joints, but in general appearance, it much more 

 closely approaches Desvoidy's SabetJies. The antennse are 

 almost as short, in proportion to the proboscis, as the palpi. Mr. 

 Theobald defines the genus as follows : — 



" Head covered with flat scales, also the abdomen ; palpi short in 

 both sexes, five-jointed, the first and fifth joints small, second long, 

 nearly the same length as the third and fourth together ; antennae four- 

 teen-jointed. Wings with the two fork-cells rather short ; scales liormal, 

 much as in ^des: In the ^ , the front claws are unequal, and each with 

 a single tooth ; in the $ , equal and simple." 



1. H^MAGOGUS CYANEUS (Fabr.). 



= Culex cyaneas, Pabr. ; Hcemagogus splendetis, Williston. 



(Syst. Antl. 35, 9, Fabricius ; Dipt. Exot. p. 8, Wiedemann; Traus. Ent. 

 Soc. Lond. (1896), p. 272 ( = splendens), Williston.) 



Thorax deep blackish-brown, with deep metallic-blue lustre, 

 with brilliant green, coppery, and violet scales. Abdomen black, 

 with brilliant blue and violet scales, the first five segments with 

 basal lateral white spots forming more or less of a lateral while 

 line. Legs metallic- blue ; undersides of hind femora pale golden 

 on the basal half. {Vide Fig. 51 ; 7, and 7a, p. 609.) 



$ . — Head black, clothed with brilliant fiat scales, those at the sides 

 bright blue and white, those behind metallic-green and blue ; palpi 

 covered with bright purple scales ; proboscis long, deep violet-black ; 

 antennae dark brown, basal joint dark. Ground-colour of pleurae nearly 

 black, clothed with brilliant, glistening, white scales. Veins of wings 

 clothed with iridescent brown scales, the fork-cells decidedly shorter 

 than their stems, and their bases in one line. Length. — 5 mm. 

 Habitat. — South America and West Indies. 



Note. — Mr. Theobald believes that AVilliston's H. sjileiidens is 

 sj'nonymous with the Culex cyaneus of Fabricius. 



Genus XXL URANOT^NIA ("L.A." Arribal. p. 68). 



This genus was separated from JEdcs by Arribalzaga, in 1891, 

 and is certainly a very distinct type. The gnats belonging to it 

 are all inhabitants of warm climates, of small size, and are 



