African Phlebotomic Diptera. 345 



transverse band mummy-brown ; transverse band extending 

 obliquely backwards from first longitudinal to posterior 

 branch of fifth vein, base of its proximal margin on a level 

 with base of third longitudinal vein, that of its distal margin 

 on a level with distal extremity of stigma, band narrowing 

 until it reaches base of fifth posterior cell, in which, as also 

 in discal cell, it is somewhat emarginate on its outer side ; 

 veins mummy-brown, in places ochraceous-buff. Halteres : 

 knob dark brown, stalk cinnamon. Legs: middle and hind 

 femora clothed with maize-yellow hair, long and fine below ; 

 front tibiae stout, but not incrassate, distal two-thirds 

 brownish ; last four joints and distal extremity of first joint 

 of each tarsus dark brown. 



Zululand : Kosi Bay, February-March, 1906 (F. Toppin : 

 presented by Mr. E. Warren, Government Museum, Pieter- 

 maritzburg, Natal). 



With Chrysops fuscipennis, Ricardo (Mashonaland and 

 Nyasaland Protectorate), C. ciliaris, Lw. (the type of which 

 was stated by its author to be from " Caffraria "), and the 

 new species from Northern Nigeria described below, C. lati- 

 ceps forms a well-defined group, recognizable at once by the 

 sharply defined and characteristic wing-markings (which are 

 without an apical blotch on the distal portion of the costa), 

 as well as by the general fades, including the broad head, 

 broad and thickset body, and fringed hind tibiae. From 

 C. ciliaris, Lw., C. laticeps may be distinguished inter alia 

 by the abdominal markings, the bands on the third and 

 following segments being entire instead of widely interrupted 

 in the middle line ; from C. fuscipennis, Ricardo, the new 

 species is distinguishable by its shorter antennse, differently 

 shaped ocellar spots, and conspicuous bands of ochre-yellow 

 hair on the dorsum of the abdomen. Owing to its small 

 size and dusky coloration, especially its dark abdomen and 

 legs, the following species cannot possibly be confused with 

 C. laticeps. 



Chrysops pusillula, sp. n. 



? . — Length (1 specimen) 5 mm. ; width of head 2 mm. ; 

 width of front at vertex 1*2 mm. ; length of wing 5*2 mm. 



A very small dusky species, with sharply defined wing- 

 markings of the same type as those of C. laticeps (no apical 

 blotch on costa). — Head smoke-grey, pollinose, front mouse- 

 grey ; thorax mouse grey, pollinose, except median third of 

 dorsum, which is light grey ; dorsum of thorax in case of type 

 with a pair of elevated and widely separated shining black 



