PHILIPPINE DIPTERA, II 35 



174. Elassogaster plagiata sp. nov. 



A species with the facies of a Stencypterina, with complete 

 thoracic suture, and with a small, oblique, anterior cross vein 

 (almost as in Elassogaster trivittata) , distinct from any other 

 species of its genus because of the broad fuscous patch on wings 

 in front of the posterior cross vein. 



Female. Length of body, 10 millimeters; of wing, 8. Head 

 black, opaque, and deep black on frontal band, gray-dusted on 

 face, and shining bluish on occiput, which shows a whitish-dusted 

 border near the eyes. Vertex gray with two equal parts of 

 strong, but short, black bristles; no other bristles on head. 

 Frons with short shining yellowish pubescence along the middle 

 line and above the antennse. Antennae inserted a little below the 

 middle of eyes, shorter than the face ; the two basal joints dark 

 reddish brown ; the third black, gray-dusted, obtuse at end, with 

 a basal dark yellowish arista, which is shortly plumose on the 

 basal two thirds. Praslabrum transverse, shining black; palpi 

 and proboscis black. 



Thorax and scutellum dull bluish black, the pleura a little 

 shining and a little greenish, the sternopleura and a transverse 

 band gray; bristles black, the scutellum with the apical pair 

 alone. Mesophragma shining black. Halteres whitish, with 

 the stalk black near the base. Abdomen of the same color as 

 thorax, with a soft white pubescence ; the first segment with the 

 basal part restricted to form a distinct stalk and black in the 

 apical half, ovipositor blackish brown. Legs uniform bluish 

 black with short gray dust ; front femora not bristly below ; spur 

 of middle tibiae long. 



Wings hyaline, with a faint yellowish tinge and with the veins 

 black ; costal cell brownish, subcostal cell black ; at apex a short 

 brown apical border, which begins as a very narrow line after 

 end of second vein and, becoming gradually broader, ends at 

 the fourth vein, where it is truncate and incloses a broad, sub- 

 hyaline patch in the apical part of first posterior cell. The 

 cross veins not infuscated; in front of and in contact with the 

 posterior cross vein a broad fuscous band, which begins near 

 the middle of first posterior cell and ends at hind border. Cross 

 veins at end of second basal and of anal cell perfectly straight 

 and placed on the same right line. 



LUZON, Laguna, Mount Maquiling (Baker). 



175. Scelostenopterina femorata Hend. 1914. 



A single male specimen from Mount Banahao seems to belong 

 to the present species, which was briefly described by Hendel 



