CLUSIIDAE (HETEKONEUEIDAE) AND SAPROMYZIDAE. 



211 



distinguished from Panurgopsis by the anterior orbitals being directed back- 

 wards, and by the presutural bristle being stronger ; but his figure {op. cit., p. 

 122, fig. 38) shows the anterior orbitals curved inwards at the tips as in Panur- 

 gopsis. The strength of the presutural bristle is of little importance in this 

 group ; only its total absence is worth considering as a generic criterion, and 

 even where it is normally absent it is sometimes weakly represented. 



In the paper dealing with Oriental Saproniyzidae which is referred to on 

 p. 201 above, I have included a synopsis of the genera related to Panurgopsis, 

 and the Samoan species run satisfactorily to it in the key. 



In the Samoan material there appear to be representatives of only one 

 rather variable species, which is described below as new. 



12. Panurgopsis quadriseriata, sp. n. 



(^$. Pale testaceous yellow, slightly shining. Frons at vertex about one- 

 third as wide as head, its length about 1 -5 as great as its width, hairy in front, 

 and with bristles as in P. (Prochaetops) nigriseta Bezzi, postverticals well below 

 vertex, in other respects as that species. Ocellar spot black, a dark brown 

 mark between each antenna and eye, and sometimes two small dark dots on 

 centre of labrum. Thorax with dorsum largely fuscous, with a broad pale 

 central vitta extending over apex of scutellum and centre of postnotum, lateral 

 margins of mesonotum yellow, dark sublateral portions varying from brown to 

 blackish, always darker along pale stripe ; sternopleura with a dark mark on 

 upper anterior portion : 1 -|-2 dorsocentrals, intradorsocentral hairs biseriate, 

 sternopleurals 2 ; scutellum slightly flattened on disc. Abdomen ovate, with 

 four series of black dorsal spots on anterior margins of tergites, faint in immature 

 examples. Legs normal, yellow. Wings as in P. nigriseta, hyaline. Halteres 

 with yellow knobs. 



Length, 3-3'5 mm. 



Savaii : Salailua, rain forest, 2,000-4,000 feet, 1 type, 17.V.1924 (Bryan). 

 Safune, lower forest, 1,000-2,000 feet, allotype and 1 ^ paratype, 4.V.1924 

 (Bryan). Tutuila : Leone Road, paratype 19.ii.l924 (Bryan). Upolu, 

 paratype 9, 3.vi.l924. Type in the Bishop Museum. 



The last-mentioned specimen is immature and lacks definite dark spots on 

 the abdomen. 



