AET. 15 NOTES ON ACALYPTRATE FLIES MALLOCH 15 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) SAMOAENSIS Malloch 



Plaglostenopterina samoaensis Malloch, Insects of Samoa, Diptera, fasc. 

 5, p. 230 (1930). 



This rather outstanding species is knowji only from the Samoan 

 Islands. The tarsal claws and very dark wings readily separate it 

 from any of its relatives. 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) FORMOSAE Hendel 



Plagiostenopterina formosae Hendel, Abhaud. Zool.-Bot. Gesellsch., Wien, 

 vol. 8, p. 56, 1914. 



There is a specimen of this species, evidently a paratype, in the 

 museum collection. The only locality known is Formosa. 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) DUBIOSA, new species 



Similar in all respects to aenea, except in having the frons shining 

 and with only the black spot dull, the arista of the male without a 

 palette, the tomentose triangle in front of ocelli lacking, the fourth 

 tergite of male shorter than the fifth, and no pale hairs on anterior 

 portion of the third tergite in either sex. 



Length, 8-10 mm. 



T7/pe.— Male. Cat. No. 43053, U.S.N.M. Allotype and three male 

 paratypes, Singapore, Straits Settlements; paratypes, Colombo, 

 Ceylon (Compere) ; and Mindanao, P. I. (C. F. Baker). 



My first impression was that this might be fasciata Hendel, a 

 Ceylonese species, but that has the frons without a dull black central 

 spot, and the outer cross vein of the wing broadly clouded. The 

 outer cross vein in the present species is very faintly clouded, almost 

 imperceptibly so. 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) PARVA, new species 



Female. — Very similar in general appearance to aenea^ but smaller, 

 with the thorax less evidently bluish, the mesonotum almost lacking 

 punctures and the scutellum entirely without either punctures or fine 

 discal hairs. The lower half of the face is shining black, the upper 

 half whitish dusted, and the epistome more protruded in profile than 

 in aenea, while the preocellar triangle is glossy though the remainder 

 of the frons is much as in aenea. Though the humeral bristle is 

 lacking on one side there is a slightly differentiated one amongst the 

 numerous long hairs on the other, and it is possible that this bristle 

 may sometimes be well developed. 



Length, 6.5 mm. 



2^y^e._Kaiserwilhelmsland (R. Schlechter). In the Deutsches 

 Entomologisches Museum. 



