WEST AFRICAN TRYPETlD^. 167 



As Professor M. Bezzi's original descriptions o£ D. vertebratus and 

 1). mesomelas are in Italian and Latin and unlikely to be accessible to 

 readers in West Africa, I have added translations so as to complete the 

 descriptions of the figures given in the plates. 



Dacus vertebratus, Bezzi. (PI. XIII, figs. 3 & 4.) 



Eeddish brown, spotted, palpi and antennse yellowish, face with two broad 

 black spots, front with median spot and three dark orbital spots and a dark 

 mark beneath the eyes on the oral margin. On the dorsum of the thorax 

 three triangular black marks, the marks on the humeri, the mesopleural 

 sutures and the scutellum yellow, and two yellow spots behind the root of 

 the wings. Abdomen rounded, with tlie apex obtuse ; a median longitudinal 

 line and transverse lateral marks black. Legs yellow, with the apex of the 

 femora, the tibiae and the distal segments of the tarsus darkened. Wings 

 hyaline, with a narrow band along the anterior margin, dilated at the apex 

 into a spot, and a dark band on the anal cell. 



(^ . The third segment of the abdomen with nine or ten black bristles upon 

 the posterior margin. 



? . Ovipositor short, base swollen, cylindrical. 



Length of body 6-7 mm., wings 5^-6 mm. 



Dacus mesomelas, Bezzi. (PL XII, fig. 2.) 



o . Black, head and thorax with ferruginous spols. Face below wiih two 

 circular black spots. Scutellum yellow, with a broad median longitudinal 

 black band. Abdomen with a broad longitudinal ferruginous band divided 

 by a fine black line. Legs yellowish, the posterior tibise black. Wings 

 hyaline, with a narrow dark streak along the costa and the anal cell, and a 

 very small dark spot at the apex of the third vein. A single yellow spot on 

 hypopleura. Sides of abdomen without bristles. 



Length of body 6'5 mm., wing 5*5 mm. 



Dacus bipartitus, sp. n. (PL XIII, figs. 1 & 2.) 



Brown ; head buff ; thorax dark brown, with three yellow stripes behind 

 the transverse suture ; scutellum yellow ; abdomen dark brown, with two 

 yellow transverse bands, the broader being on the apical half of the second 

 segment. Wings hyaline, with broad brown costal and anal bands. 



Head. Occiput pale brown, with yellow orbits. Front buff, with three 

 pairs of brown orbital spots and a median brown spot, the four corners of 

 which are connected with the two lower pairs of orbital spots ; ocellar spot 

 dark brown ; face yellow, with two large black spots and a 1 rown spot 



