BY AV. W. FROGGATT. 871 



theif base and back of head, black. Thorax : dorsal surface 

 Hack; with silvery pubescence forming indistinct bands; humeri 

 small, well down the sides; nude area on niesopleura forming a 

 narrow stripe not extending to the dorsal surface; two rounded 

 spots on hypopleura, and the narrow convex scutellum )'ellow; 

 apical portion behind the scutellum forming a distinct, black, 

 square patch marked off b}' the scutellum above, and the yellow 

 blotches on either side. Wings hyaline, nervurcs brown. Legs 

 straw-yellow, darkest at junction of femora and tibiae. Abdomen 

 of male spindle-shaped, broadest in the centre, tapering to apex; 

 of female much broader, anal segment narrow truncate, with the 

 sheath and ovipositor reddish. General colour ochreous, mottled 

 with black, forming an irregular dorsal stripe, with a lateral one 

 on either side, and the extremity black. 



C h se t o t a c t i c characters as in Dacus passijlorce. 



Hab. — Tonga(T. Kirk; bred from mangoes imported into New 

 Zealand). 



Dacus kirki, n sp. 

 Length 8 mm. 



Head reddish-brown; two large black spots below the antenna;, 

 spots on front very slight, hardly showing; a small blotch enclosing 

 the ocelli and back of head blackish, terminal joint of antennae 

 fuscous. Thorax black, shaded with silvery pubescence, forming 

 a broad well developed dorsal stripe in the centre, with the sides 

 irregularly frosted; humeri well down the sides, small, and 

 almost oval; nude area on the mesopleura forming a stripe on 

 the side, not reaching above the insertion of the wings, yellow; 

 scutellum angular, black on the upper surface, with the extreme 

 margins and undersurface yellow, joining a broad yellow stripe 

 on either side of the hypopleura. Wings hyaline, nervures 

 "brown. Legs pale yellow, mottled with brown, femora reddish- 

 "brown, tibiae darker. Abdomen elongate-oval or heart-shaped, 

 black, with two parallel yellow stripes separated from each other 

 by a narrow black dorsal stripe running down to the tip; 

 ovipositor small, undersurface yellow. 



