ANOPHELES (SENSU LATO), WITH NOTES ON NOMENCLATURE. 143 



This species belongs to the genus Pyretophorus in Theobald's classification, and 

 is closely allied to A. intchfordi, Power, and A. austenii, Theo. From both it is 

 distinguished by the bright i/ellow casta and first vein and by the small size of the 

 fourth costal spot, \7hile the dark areas on the veins are smaller and less numerous, 

 so that the wing has a less mottled appearance. A.pitchfordi is also distinguished 

 from A. flamcosta by the presence of a very small fifth costal spot. A. austenii 

 has the first two costal spots joined into one, and has broader bauds on the legs. 



Anopheles (Nyssorhynchus) watsoni, sp.n., (^ Q- 



Closely allied to A. maculipalpis, Theo., and A. pretoriensis, Theo. From the 

 former it is distinguished by the absence of spots on the palpi, and from both by 

 the entire absence of spotting on the legs. In addition to this, the new species 

 differs from its very near ally A. pretoriensis in the banding of the hind tarsi. 

 The hind legs in A, watsoni are marked as follows : narrow white bands on the 

 apices of the tibite and first two tarsal joints ; third to fifth tarsal joints 

 white, except for a dark brown band of variable length near the base of the 

 third joint. In A. pretoriensis the white band on the first two tarsal joints 

 are markedly broader, that on the second joint being almost one-third as long as 

 the joint itself. In A. watsoni, as in A. pretoriensis, there are no scales on the 

 abdomen of the female, and only on the genital segment (occasionally a few also 

 on the penultimate segment) of the male. 



There is also a general (though not very close) resemblance between this species 

 and A. (^Nyssorhynchus) aureosquamiger, Theo. Theobald placed A. anrcosijuaniiger 

 in Pyretophorus, but as it has numerous fiat scales on tlie scutum it belongs to the 

 sub-genus Nyssorhynchus, in the sense in which it is here employed. 



This species bears the same relation to A. prctoriensit that A. ludlowi does to 

 A. 7-ossi, and it is a matter of opinion as to whether the spotting of the legs is a 

 specific character or not. Banks regards A. ludlowi as a variety of A. rossi. 



Northern Nigeria: Katagum, 3 c5', 13 Q (Dr. C. E. S. Watson) ; Minna, 

 1 Q {J. J. Siinjjson). 



Types in the British Museum. 



