212 



INSECTS OF SAMOA. 



The Fijian species P. nigriseta Bezzi has a large, blackish, central spot on 

 the lower margin of the face, and the fore legs from the tips of the femora to 

 those of the tibiae black or fuscous. 



Trigonometopus Meigen. 



The single species of this genus represented in the collection before me is 

 practically normal as regards generic characters, the face receding greatly 

 below, and the presutural (posthumeral) bristle being absent, or represented by 

 a short setula. I am unable to identify this species among those already 

 described, and therefore consider it new to science. Although not recorded by 

 Bezzi as occurring in Fiji, the genus is found in Europe, North and South America, 

 Asia, man}' of the islands between that continent and Australia, and also in 

 Australia itself. 



13. Tngonometopus semibrunnea, sp. n. (Text-fig. (i). 



(^$. Testaceous yellow, slightly shining. Frons over twice as long as its 

 width at upper angles of eyes, clothed with hair throughout entire length in 

 centre, and entire width in front, ocellars and postverticals small ; face much 



Text-fig. 6. — Trigonometopus semibrunnea, sp. a. Wing. 



receding below, epistoma in profile about middle of head, antennae normal ; 

 arista pubescent. Ocellar spot brown, sometimes a similarly coloured central 

 streak extending from it to anterior margin of frons ; occiput fuscous except 

 on each side of central dark mark, a dark brown mark between each antenna 

 and eye ; antennae brownish testaceous ; arista black ; palpi testaceous yellow ; 



