ON THE GENUS PHLEBOTOMUS. PART IV. 311 



between tlie two forks of the 2nd longitudinal vein being five times as great as 

 tbe length of the upper branch of the 2nd fork, hairs forming the fringe dense and 

 of great length, some of them being much longer than the greatest width of the 

 wing. The hairs and scales on all parts of the body are not, apparently, so easily 

 deciduous as in other members of the genus. 



Length, 1'6 mm, approximately |; length of wing, 1"25 mm. 



Gold Coast : Gambaga, in latrine, 1 $ (type), l.vi.18 {Dr. A. Ingram). 



Phlebotomus simillimus, Newstead. 



Gold Coast: Yamalaga, 18. v. 18, 1 c?, 3 5? ; Kpalgu, 30. v. 18, 1 ^J ; Kukumai 

 6.viii.l8, 1 (J, 1 ? ; Maibindiga, on walls of Rest House, 31. v. 18, 1 (J ; Nkoranza, 

 9.viii.l8, 2 (?(?, 10 ?$; Kulmasa, 22.vii.18, 1 $; Sekodumase, 5 ?$ Yeji, 

 8.viii.l8, ; 6.V.18, 1 c? (^^. ^- Ingram). 



Phlebotomus walkeri, Newstead. 



Phlebotomus walkeri, Newst., Bull. Ent. Res. v, p. 190 (1914). 



Phlebotomus longipalpis, Newst. {nee Lutz & Neiva), ibid. p. 188. 



The species taken by Dr. F. D. Walker on the Abuna River, Bohvia-Brazil 

 Boundary, in 1913, and recorded by me in this Bulletin \ {I.e.) as P. longipalpis, Lutz 

 & Neiva, is, as I surmised at the time, clearly distinct and, so far as I can judge, 

 must take specific rank under the alternative name, walkeri, suggested by me 

 (l.c.) . 



The males of the two species are easily separable by the characters of the external 

 genitaHa : in P. longipalpis the small brushes or peniculi are absent, and the 

 four long spines on the distal segment of the superior claspers are arranged as 

 follows : one apical, one sub-apical, and the remaining two placed closely together 

 on opposite sides of the segment in a similar way to the corresponding spines in 

 P. sergenti (see fig. 2, b) ; whereas in P. walkeri the 4th spine is quite isolated from 

 the others. 



I am pleased to be able to clear up the discrepancies to which I had previously 

 called attention, thanks to the generosity of Dr. Lutz, who has very kindly presented 

 me with examples of his P. longipalpis. 



Phlebotomus sp. 



The examples recorded below come very near P. antennatus, Newst., and possibly 

 represent a degree of variation in the antennal formula of the females of this 

 species. But pairs taken in coitu are needed before one can state to what extent 

 variation occurs in the females of this and other allied species. 



Gold Coast: Yeji, 6. v. 18, 1 $; Savelugu, in Rest House, 25. v. 18, 1 $; Wa, 

 on walls of Rest House, 20.vii.l8, 1 5 5 Navarro, on walls of M.O.'s quarters, 

 22.vi.18, 2 ??; Kwaman, 10.viii.l8, 3 $$; Yamalaga, 18. v. 18, 2 $?; Salaga, 

 on waUs of M.O.'s quarters, 10. v. 18, 1 $ {Dr. A. Ingram). 



Phlebotomus sp. 



Mesopotamia: Amara, x.l8, 1 ? (at light); 8.ix.l8, 1 9 (at light); Amara, 

 River Tigris, 30.ix.l8, 1 $ {Capt. P. A. Buxton). 



