NOTES ON THE ETHIOPIAN FRUIT- FLIES— I. 231 



VI. Pterandrus, gen. nov. 



The present new genus is erected here for the 3rd section of Ceratitis in my paper 

 of 1909.* It shows the complex of characters of the preceding genus, both 

 structurally and ornamentally, but is very distinct in the male sex, which lacks the 

 frontal appendages and has the middle legs feathered. The head is more compressed, 

 and has the middle band of the frons less hairy ; the arista has longer pubescence, 

 even on the underside ; the scutellum is similarly provided with stout, short hairs 

 on the disc. 



I have not succeeded in finding a distinction from the females of the following genus. 



Type : Ceratitis rosa, Karsch, 1887. 



The species of this exclusively Ethiopian genus may be distinguished as follows : — 



1(6). Wings destitute of an oblique dark band across the last section of the 4th 



longitudinal vein. 

 2(6). Middle femora feathered beneath, 

 3(4). Middle tibiae broadly feathered ; basal segment of the ovipositor short, 



measuring only 1 mm. in length . . . . . . . . anonae, Grah. 



4(3). Middle tibiae more shortly feathered ; ovipositor twice as long colae, Silv. 

 5(2). Femora not at all feathered ; ovipositor short . . . . rosa, Karsch. 



6(1). Wings with a distinct oblique dark streak across the middle of last section 



of 4th vein. 

 7(8). Femora quite yellowish ; thorax yellowish on the back and with less distinct 



pleural whitish band. . .. .. .. .. .. rubivorus, Coquill. 



8(7). The four posterior femora broadly black ; thorax black on the back and with 



a distinct, white mesopleural stripe . . . . . . volucris, sp. nov. 



1. Pterandrus anonae, Graham, 1908 (pennipes, Bezzi, 1908); Silvestri, Boll. 



Labor. Zool. Portici, viii, 1913, p. 61, fig. x. 



Described from Ashanti and Congo, and recorded subsequently from South 

 Nigeria. 



2. Pterandrus COlae, Silvestri, Boll. Lab. Zool. Portici, viii, 1913, p. 63, 



fig. xi. 

 Described from Gold Coast, Aburi, and from Camerun, Victoria. 



There are in the collection some specimens of both sexes from Gold Coast, Aburi, 

 1912-13 (W . H. Patterson) (Plate v, fig. 4). 



3. Pterandrus rosa, Karsch, Entom. Nachr, xiii, 1887, p. 22; Froggatt, 



Keport 1909, p. 111. 



Described from Delagoa Bay, and recorded from Natal. 



I have received from Prof. Silvestri a pair of this species, caught at Durban, 

 Natal, on 15th February 1917. 



* Boll. Lab. Zool. gen. agr. Portici, hi, April 1909, p. 273-313, 4 figs, (see p. 277). 



