14 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



Mesopleural bristle present ; aristae without hairs, or much shorter haired 

 than above; section of costa between apices of first and second veins dis- 

 tinctly shorter than that between second and third; frons usually partly 

 shining; hind tarsi dark haii'ed above posteriorly 4. 



4. Knobs of halteres pale yellow 5. 



Knobs of halteres dark brown or fuscous 6. 



5. Frons entirely shining, brownish red and without a dull black spot in center ; 



African species submetallica (Loew). 



Frons shining, blackish brown, with a more or less evident violet tinge, and a 

 dull black central spot on which the hairs are much darker and denser 

 than elsewhere duhiosa, new species. 



6. Arista of male with an apical palette; frons almost all dull, with an opaque 



black central spot on the bluish central stripe ; a small white tomentose 

 triangle extending in front of anterior ocellus in both sexes ; fourth tergite 



(third visible) in male about 1.5 as long as fifth aenea (Wiedemann), 



Arista of male without an apical palette; neither sex with a small white 

 tomentose triangle in front of the ocelli; fourth tergite in male shorter 

 than or but slightly longer than fifth 7. 



7. Frons almost entirely dull, with a central opaque black spot as in aenea; 



fourth tergite shorter than fifth in male enderleini Hendel. 



Frons entirely shining ; fourth tergite slightly longer than fifth in male. 



westermanni Hendel. 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) AENEA (Wiedemann) 



Dacus aenea Wiedemann, Zool. Mag., vol. 3, p. 29 (1819). 



I am accepting Hendel's interpretation of this species as correct. 

 It is not a difficult matter to identify the male because of its posses- 

 sion of an apical palette to the arista and the long fourth abdominal 

 tergite, but the female is very similar to that of enderleini. In my 

 specimens the white tomentose triangle in front of the ocelli is quite 

 distinct and very different from the glossy similarly sized triangle of 

 endedehii. It appears also that the fourth tergite is comparatively 

 longer in contrast with the fifth in this species than it is in the other, 

 but the abdomen of the female is subject to more expansion and con- 

 traction than is that of the male, so that one can seldom rely upon 

 the comparative lengths of the tergites, at least those of the apical 

 half. 



Localities, Los Banos, Kolambugan, and Leyte, P. I. (C. F. Baker). 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) ENDERLEINI Hendel 



Plagiostenoptcrina enderleini Hendel, Abhand. Zool.-Bot. Gesellsch., Wien. 

 vol. S, p. 56 (1914). 



Similar in size and general characters to aenea, differing as noted 

 in the above paragraph. 



Localities, Davao, Mindanao ; and Mount Maquiling, Luzon (C. F. 

 Baker). 



