GENUS STEGOMYIA 215 



All the species of the genus are of a yellowish colour and most are 

 of medium size, though some are large insects. 



Taeniorhynchus titillans, Walk. According to Edwards this spe- 

 cies should be the type of Arribalzaga's genus, as it was evidently the 

 species described by him in his elaborate description of Taeniorhynchus. 

 This species, together with pseudotitillians, Theo., is said to act as 

 the invertebrate host of Filaria bancrofti. T. titillans is a large 

 river species common in South America ; it has a brown thorax, 

 dark palpi and proboscis, the latter sometimes with a trace of banding ; 

 abdomen dusky brown, sometimes with white scales on the sides ; 

 the legs are yellowish brown, femora and tibiae without bands, but 

 tarsi with basal pale bands. Pseudotitillans is very like it, but is 

 said to be smaller, and more reddish brown in colour, and has yellow 

 apical bands on the abdomen. The eggs of most of the species of 

 this genus are laid in long masses of two or more rows ; the* larva has 

 a long- or short-pointed syphon. 



GENUS MANSONOIDES, THEOBALD 



Mosquitoes resembling those of the last genus, as regards the struc- 

 ture of the smaller claw of the fore and mid tarsi of the male, but 

 with the palpi curved upwards as in Culex, and the last joint bent down 

 at an angle to the penultimate one. 



Mansonoides uniformis, Theobald. Allied to T. titillans, but the ab- 

 domen has apical lateral pale spots, and the legs are mottled and banded. 

 This is a common species in South India, and is also found in many 

 parts of the Oriental Region, as well as in the Ethiopian and Australian ; 

 it is found in swampy places, and in forests, where several observers 

 have noted that it bites viciously; it is believed to be one of the inverte- 

 brate hosts of Filaria bancrofti. 



GENUS STEGOMYIA, THEOBALD 



The mosquitoes of this genus are mainly characterized by the white 

 flat scales on the head and scutellum. Palpi long in the male and 

 very short in the female. The thorax usually has white spots or bands; 

 and the legs are black with white bands. 



The genus Stegomyia belongs to the Aedes group, and is closely allied 

 to Ochlerotus, Arrib., but differs from it by the thin male palpi. The 

 external genitalia of the female are poorly developed, while those of the 

 male are large and complex ; the large and small claws of the male may 

 be uniserrated or not. 



