164 ERNEST E. AUSTEN—THREE NEW AFRICAN SPECIES 
Chrysops centurionis, sp. n. (fig. 2). 
Q.—Length (2 specimens) 9°5 to 10°6 mm.; width of head 3 to 3°25 mm. ; 
width of front at vertex 1°2 mm.; length of wing 9°75 to 10°25 mm. 
Large-sized, long-winged species; dorsum of thorax and distal extremity of 
abdomen mummy-brown, proaimal portion of abdomen raw-sienna-coloured, with a 
pair of broad but semi-indistinet, blackish, longitudinal stripes; antenne dark brown 
(second joint clove-brown), first joint, except distal extremity, russet-brown or 
cinnamon * wings marked as shown in fig. 2, without a broad and conspicuous 
blackish or dark brown transverse band across centre; legs burnt-umber or raw- 
umber-coloured, front and hind tibie and first joint of front tarsi brown, last four 
joints of front tarsi and distal extremities of middle and hind tarsi dark brown, 
TERZI~—~ 
Fig. 2.—Chrysops centurionis, Austen. Q. x 5. 
Head ochre-yellow pollinose, a transverse band on vertex, including ocelli and 
extending from eye to eye, dark sepia-coloured ; frontal callus raw-umber- 
coloured, dark brown on sides and upper margin, wider than deep, upper margin 
curved and produced in centre into a small upwardly directed angle, lower 
margin straight; face with a single, median, shining mummy-brown, elongate 
cordate facial tubercle ; jowls with a small, shining, clove-brown transverse mark, 
somewhat triangular in outline, below each eye; front, above frontal callus, 
clothed with short dark brown hair, under surface of head and sides of lower part 
of face clothed with chrome-yellow hair; palpi tawny-ochraceous, terminal joint 
lanceolate, narrower than in foregoing species ; first joint of antenne not at all 
swollen, clothed like second joint with short black hair, third joint at end of 
proximal third with a burnt-umber-coloured band. Thorax: dorsum with a 
narrow, dark brown, longitudinal median stripe, and also with a pair of more 
or less faint and indistinct chrome-yellow or buff-yellow, admedian pollinose 
