CLUSIIDAE (HETERONEURIDAE) AND SAPROMYZIDAE. 205 



Thorax with four pairs of acrostichals and dorsocentrals ; mesopleura with one 

 strong discal bristle. Mesonotum with following dark brown marks : a pair of 

 vittae between acrostichals and dorsocentrals, broken at third pair of dorso- 

 centrals, and widened behind to enclose prescutellar acrostichals ; a pair of 

 interrupted vittae between dorsocentrals and lateral margin, and a large spot 

 at base of each bristle ; pleurae largely spotted with dark brown ; scutellum 

 without dark spots. Abdomen with numerous small and moderately large 

 spots of pale dust on dark brown ground, each hair and bristle inserted in one 

 of the pale spots, largest of latter in a series near posterior margin, and one in 

 centre of anterior margin, of each tergite. Legs testaceous yellow, with dark 

 bases to femora, a dark mark near tip of each femur, and one near base of each 

 middle and hind tibia. Wings as shown in text-fig. 1. Ultimate section of 

 fourth vein twice as long as penultimate. Halteres dark brown. 

 Length, 3 mm. 



Tutuila : Pago Pago, 1 (type), 14.xii.l926 (Buxton and Hopkins). 

 In all three of the small species the halteres are dark, in T. caniventris they 

 are yellow. 



5. Trypaneoides puncticeps, sp. n. (Text-fig. 2). 



A darker coloured species than the foregoing, with which it agrees in 

 structure and size. The covering of dust on the head and thorax is leaden 



Text-fig. 2 — Trypaneoides puncticeps, sp. u. Wing. 



grey, that on the abdomen yellowish-grey. The face has the lower dark mark 

 forming a complete band, and the thoracic dorsum has the submedian vittae 

 much broader and complete, connecting, or almost connecting, with two dark 



