CLUSIIDAE (HETERONEURIDAE) AND SAPROMYZIDAE. 



203 



Cheek without a dark spot near vibrissal angle ; three clear spots and a 

 central longitudinal streak in submarginal cell of wing (between 

 apical sections of veins 2 and 3) ; Eijian species .... 



Cheek with a black-brown spot near vibrissal angle ; submarginal cell of 

 wing with clear spots, with or without longitudinal central streak 



Only three clear spots in submarginal cell of wing ; no clear spot on each 

 side of inner cross- vein ; ground colour dark brown 



More than three clear spots in submarginal cell of wing, the additional 

 spots rather small and faint ; a clear spot on each side of inner cross- 

 vein ............ puncticeps, sp. 



leucosticta Bezzi. 



samoaensis, sp. n. 



3. Trypaneoid.es caniventris Bezzi. 



This species, besides its larger size and the distinctions mentioned in the 

 above key, has the frons more protuberant in front, and two or more out- 

 standing discal bristles on the mesopleura. 



Length, 4-6 mm. 



Upolu: Apia, 31.V.1924 ; Vailima, 9.vi.l924. Tutuila : Pago Pago, 

 4.xi.l925 (Buxton and Hopkins) ; and Leone Road, 19.ii.l924 (Bryan). Manua : 

 Tau, 20.ii.l926 (Judd). Tonga Islands : Vavau, Neiafu, 5.iii.l925 ; Nukualofa, 

 22.ii.1925 (Hopkins). 



Judging from its occurrence in these three groups of islands, this species 

 would appear to be the most widely distributed of those found in this region, 

 but it may be that its larger size is responsible for its more frequent inclusion 

 in collections. 



3a. Trypaneoides leucosticta (Bezzi). 



I accept as belonging to this species one specimen before me, despite certain 

 differences between it and Bezzi's description and figure. It is possible that the 

 faint longitudinal streaks in the marginal, submarginal, and first posterior cells 

 of the wing in my specimen are evident because the example is rather teneral, 

 since they do not show in Bezzi's figure. There is a marked distinction between 

 the specimen before me and Bezzi's description, the former having the abdomen 

 pitchy black, with two round white pollinose spots on each side of each tergite 

 except the basal one, situated about midway between the fore and hind margins, 

 and a smaller white pollinose spot in the middle of the hind margin. Bezzi, on 

 the other hand, describes the species as having the paired spots on the hind 

 margin, and the central one on the fore margin. Unless we have examined 



