ART. 15 NOTES ON ACALYPTRATE FLIES MALLOCH 21 



Structurally the species are very similar, the principal distinction 

 lying in the armature of the hind trochanters which in the present 

 species consists in the male of a short wartlike protuberance on the 

 inner surface near the apex, furnished to tip with fine pale hairs. 



Length, 10 mm. 



Type.— Male, Cat. No. 43068, U.S.N.M. Tangcolan, Bukidnon, 

 P.I. (C.F.Baker). 



PLAGIOSTENOPTERINA (BAKEROMYIA) INERMIS. new species 



Feiiiale. — Similar to calcarata in general coloration, differing in 

 the same manner as armata^ in so far as wing markings are concerned, 

 except that the costal streak is less widened at apex; the face is 

 blackish or fuscous, and the mesonotal hairs black. 



The only outstanding structural distinction appears to be that there 

 is no indication of a process on the inner side of the hind trochanters. 

 The specimen is a little abnormal in having a slight protuberance on 

 one of the mid trochanters, but this may be disregarded. 



Length, 13 mm. 



Type.— C^t. No. 43067, U.S.N.M.. Biliran, P. I. (C. F. Baker). 



PLAGIOSTENOPTERINA (BAKEROMYIA) DISCOLOR, new species 



Male and female. — Radically different from the other three species 

 in the wing markings, which rather closely resemble those of the 

 female of Carolia diptera., from which it differs in having the inner 

 margin of the preapical black mark extending in a straight line from 

 before the apex of second vein to hind margin of wing very slightly 

 proximad of the outer cross vein, in having no wedge-shaped hyaline 

 marks on the margin of wing in the black mark, the latter fading out 

 gradually toward tip of wing. Head fuscous; frons brown, inter- 

 f rontalia shining above bases of antennae ; antennae and palpi testa- 

 ceous yellow, sometimes browned in the male; face generally testa- 

 ceous yellow, sometimes more or less stained with brown. Thorax 

 black, slightly bronzy, without distinct dorsal vittae, the mesonotum 

 rather evenly grayish dusted except on lateral margins. Abdomen 

 bright metallic blue or blue-green. Legs varying from testaceous 

 yellow to tawny yellow, fore tibiae brown, fore tarsi and apices of 

 mid and hind pairs fuscous or black. 



Structurally similar to inermis, the hind trochanters unarmed in 

 the male, and the inner cross vein is more distinctly beyond the middle 

 of the discal cell. 



Length, 9-11 mm. 



Type.— Msile, Cat. No. 43069, U.S.N.M. One male paratype, Tang- 

 colan, Bukidnon, P. I.; allotype and one female paratype, Davan, 

 Mindanao, P. I. (C. F. Baker). 



