OF THE GENUS CHRYSOPS (FAMILY TABANIDiE). 163 



taat the abdomen is partly concealed, — may be distinguished from that species 

 inter alia by the first joint of the antennve not being swollen ; by the scutellum 

 being without a lai-ge, 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 fi'om 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 C. bicolor, a distinct paler area 

 extending from the posterior distal portion of the second submarginal cell into 

 the fifth posterior cell. 



From Chrysops neavei, Ansten* (the tyjje and only specimen of which at 

 present known was obtained in the Katanga District, Congo Free State), in 

 which the tliorax 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 antennaj, palpi, and legs being black or 

 blackish, instead of tawny-ochi'aceons, ochraceous-bufT, 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) S'O 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 ; scutellum 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. IVings : hyaline portion somewhat less clear than in typical form, 

 having a faint, ochraceous tinge. 



In all other details agreeing icith typical form ofG. magnifica, as described above. 



Nyasaland Protectorate : Zomba (Nkanda), December, 1910 (Dr. H. 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 

 difi:erence 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). 



