OF THE GENUS CHRYSOPS (FAMILY TABANIDZ). 163 
that the abdomen is partly concealed,—may be distinguished from that species 
inter alia by the first joint of the antenne not being swollen ; by the scutellum 
being without a large, black, median spot, extending from the base nearly to the 
hind margin ; by the black abdominal stripes being less deep in colour, less solid 
in appearance, much more slender, and separated by an interspace the width of 
which on the third segment is as great as or greater than the width of each 
stripe ; by the stripes being widely distant from the lateral margins, instead of 
in contact therewith from the third segment onwards ; and by the infuscated distal 
extremity of the wing having only a barely perceptible lightening on the hind 
border, instead of there being, as in the wing of (. bicolor, a distinct paler area 
extending from the posterior distal portion of the second submarginal cell into 
the fifth posterior cell. 
From Chrysops neavei, Austen™ (the type and only specimen of which at 
present known was obtained in the Katanga District, Congo Free State), in 
which the thorax is somewhat similarly marked, while the abdomen exhibits a 
pair of incomplete, longitudinal, clove-brown stripes,—the new species may at 
once be distinguished inter alia by the antennz, palpi, and legs being black or 
blackish, instead of tawny-ochraceous, ochraceous-buff, ochraceous, or mummy- 
brown. 
The exceedingly handsome species described above cannot possibly be confused 
with any other African species of Chrysops yet discovered. 
Chrysops magnifica var. inornata, var. n. 
Q.—Length (1 specimen) 8°5 mm. 
Distinguished from the typical form of the species by the almost total absence of 
abdominal markings, and by the somewhat greater depth of the dark interspace 
between the lateral yellow stripe on the dorsum of the thorax and the yellow stripe 
on the pleura, 
Thorax: admedian, chrome-yellow stripes on dorsum somewhat narrower than 
in typical form ; scufellum with a small, median, semicircular clove-brown spot 
on front margin. Abdomen: black markings on dorsum confined to a narrow, 
median blotch on first segment (just beyond distal extremity of scutellum), a pair 
of quadrate, admedian spots on sixth segment, extending from front nearly to 
hind margin, and a transverse band on seventh segment, not reaching lateral 
margins. Wings: hyaline portion somewhat less clear than in typical form, 
having a faint, ochraceous tinge. 
In all other details agreeing with typical form of C. magnifica, as described above. 
NYASALAND PROTECTORATE: Zomba (Nkanda), December, 1910 (Dr. HL. S. 
Stannus ). 
In view of the total absence of structural differences, and the complete 
agreement of the wing-markings, it seems advisable—in spite of the remarkable 
difference in the appearance of the abdomen (due to the black stripes being 
almost entirely wanting),—to regard this form, provisionally at any rate, as a 
variety or local race of Chrysops magnifica, rather than as a distinct species. 
* Cf. Bull, Ent. Res., Vol. I, Part 4, pp. 275-277 (January, 1911). 
