A I'ricdn Phhholomic Diptera. 425 



sliifi;^ish " : additional s[)ecimens from Luuvina River, Henj^a, 

 W. of L. Nyasa, 3000 feet, 29. i. \mv {Caidaln Richard 

 Craivskay) ; Lilongwe, Nyasaland Protectorate, February 



1907 {Captahi HalUua Hardij, R.A.M.C.) ; Kabidi Valley, 

 West Nyasa, June 1007 {Dr. Prentice, per Captain H. 

 Hardy, R.A.M.C.) ; Kasempa District, N.-\V. Rhodesia, Jan. 



1908 {E. A. Copeman) ; Salisbury, .Mashonalaud, Southern 

 Rhodesia, November 1899 (G. A. K. Marshall) ; and Anchon, 

 Ruka, and Allowa, N. Nigeria, 10-19. vii. 1907 (/. Brand). 



Hteiautopota pertinens, a widely distril)uted species, which 

 is evidently exceedingly common in the Nyasaland Protecto- 

 rate, is closely allied to 1 1, duttoaij Newst. (see below), 

 H. brunnipennis, Ricardo, and H. anicolor, Ricardo. These 

 four species constitute a natural group within which the 

 specific limits arc not altogether easy to determine. H.similis, 

 Ricardo, and H. deashainii, Austen, are more distantly con- 

 nected with this group. Prom H. duttoni, Newst., which it 

 resembles in the coloration of the body and legs, wing- 

 marUings, &c., H. pertinens is distinguished by the basal 

 portion of the third joint of the anteuna being shorter and 

 the terminal annulus longer ; in the type of H. duttoni the 

 latter is scarcely longer than the preceding annulus. From 

 H. brunnipennis, Ricardo, H. pertinens is distinguished, inter 

 alia, by tlie shape and colour of the frontal callus, which iu 

 the latter is much deeper and paler, by the wing-markings 

 being less coarse, closer together, and more yellowish, as 

 also normally by the shape of the light mark beyond the 

 stigma, which in the case of //. brunnipennis is semicircular. 

 H. unicolor, Ricardo, which is found in Uganda, differs from 

 'H. pertinens in having the brown colour of the wing confined 

 to the tip and hind border, the greater part of the proximal 

 half of the wing being bufi", while the mediastinal and lir^t 

 longitudinal veins are ochraccous buft". 



[heinalopold dulfoiii, Newstcad. 



(' Annals of Tropical jNIedicine and Parasitology,' vol. i. 

 no. 1, Feb. 1, 1907, p. 41, pi. iv. fig, 3. — Congo Free State.) 



Through the courtesy of Mr. Robert Newstcad, of the 

 Liverpool School of Tropical Medicine, I have been enabled 

 to examine the type of this species, which, as stated above, is 

 nearly allied to the foregoing. It is also clos(>ly allied to 

 //. unicolor, Ricardo (not to H. sitnilis, Ricardo, as stated by 

 Newstcad), with which it agrees in size and general colora- 

 tion. //. duttoni is distinguished from H. unicolor bv its 



