62 SYRPTITDJE. 



12 (11) Face and frons yellow; scutellum black- 

 ish ; squainuLe black, with a white 

 fringe ; hind femora at the base with a 

 conspicuous conical tubercle apophysata, sp. n. 



54. Protylocera dibaphus, Walker (1849). 



A handsome species, easily recognisable on account of its red 

 face, antennae, and legs, and the broadly interrupted velvety-black 

 band on the thoracic suture. 



The present species was described as ISristalomyia rufonasuta 

 by Bigot in 1891, and more recently as Stenaspis gypseisquama 

 by Dr. Speiser ; the identity with Walker's Xylota dibaphus is 

 established after comparison by Mr. Austen with the type in the 

 British Museum. 



This species seems to have a wide range in Tropical Africa, from 

 the East to the West Coast. In the present collection there are 

 three females from Obuasi, Ashanti, iv.-vii. 1907, "sucking a cut 

 plantain stem" (Dr. W. M. Graham); a male from Uganda 

 Protectorate, between Jinja and Busia or Mbwago's, E. Busoga, 

 3,800-4,000 ft., 18. vii.-l. viii. 1911 (S. A. Neave). 



55. Protylocera elliotii, Austen (1909). 



Very distinct, owing to the densely yellow pollinose dorsum of 

 the thorax and scutellum, and the purplish-brown wings. 



Originally described from Ruwenzori Mountains, this species is 

 also widely spread in Tropical Africa. According to the description, 

 Xylota purpurea, Walker, seems to be very like this insect. 



A female from British East Africa, Ilala, Mamma's I)ist., 

 14 m.E.of Mumia's, 4,500 ft., 18-21. vi. 1911 (S. A. Neave), and 

 a male from Yala River, southern edge of Kakumega Forest, 

 4,800-5,300 ft., 21-28. v. 1911 (S. A. Neave). 



56. Protylocera sesacus, Walker (1849). 



Characterised by the yellowish scutellum and hind portion of the 

 thorax, the black abdomen, and by the wings being yellowish 

 basally and having a broad median brown spot. 



This species is very common in West Africa, but in the collection 

 there is only a single female specimen from Obuasi, Ashanti, 8. viii. 

 1906, " caught on leaf in coita " (Dr. W. M. Graham). 



57. Protylocera xanthorrhoea, Bezzi. 



$ . Length of body 13 mm. 



Near the preceding, but distinguished by the entirely yellow 

 abdomen and different pattern of the wings. 



Head black, covered with dense grey pollen, shining black on 

 the ocelli ; lunula reddish ; facial tubercle broad and round, grey 



