16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) WESTERMANNI Hendel 



Plagiostenopterina westermanni Hendel, Abhand. k. k. Zool.-Bot. Gesellsch., 

 Wien, vol. 8, p. 50, 1914. 



PLAGIOSTENOPTERINA (PLAGIOSTENOPTERINA) SUBMETALLICA (Loew) 



Stenopterina submetaUica Loew, Sitz. Akad. Berlin, p. 660 (1852), 

 The only distinction between the two specimens identified as the 

 above species lies in the color of the halteres as indicated in the fore- 

 going key to the species. As those with pale halteres are females 

 and those with dark halteres are males it is not impossible that they 

 are but the sexes of one species that are before me, but I do not care 

 to suggest that the two species are synonyms on the basis of this 

 material. 



Locality, Lorenzo Marquez, Africa (C. W. Howard). 



Stenopterella, xiQVf subgenus 



This subgenus is erected for the reception of three species in the 

 collection, one of them ncAv, The position of the spiracles on the 

 fourth and fifth abdominal tergites of the female is sufficiently differ- 

 ent from that of all other species that I feel justified in proposing a 

 new subgenus for the group. 



All three species which I place herein have the costal margin of 

 the wing with a continuous narrow black border, and none of them 

 have the narrow black central vitta on the wing which in all species 

 of the subgenus Plagiostenofterina as limited herein extends to or 

 beyond the inner cross vein. I present below a key to the three 

 included species, 



KEY TO THE SPECIES 



1. Tboracic dorsum blue green, shagreened and not conspicuously vittate ; coxae 



and femora black brown marginata (van der Wu.p). 



Thoracic dorsum black with a bluish tinge and with dense yellow dust, leav- 

 ing only two black vittae on mesonotum; coxae and femora largely 

 yellow 2. 



2. The two black thoracic vittae tapered posteriorly ; abdomen with dense yellow 



dusted anterior margins to the tergites ; spiracles on tergites 3 and 4 near 



to anterior margin trivittata (Walker). 



The two black thoracic vittae not tapered except just at the posterior ex- 

 tremities, the centi-al yellow dusted stripe equally distinct on its entire 

 length; abdomen with but faint grey dusted anterior margins to the ter- 

 gites ; spiracles on tergites 3 and 4 situated near posterior margins. 



trivittigera, new species. 



PLAGIOSTENOPTERINA (STENOPTERELLA) TRIVITTATA (Walker) 

 Dacus trwittata Walker, List Dipt. Brit. Mus., pt. 4, p. 1072 (1849). 

 I have seen numerous specimens of this species from the Philippine 

 Islands in the collection of the United States National Museum, most 



