XII, D, 3 Bezzi: Studies in Philippine Diptera, II 143 



Mesophragma shining black. Squamss broad and long, pellucid 

 grayish, with pale yellowish and whitish pilose borders ; halteres 

 pale yellowish, proportionally small. 



Abdomen very short and broad, strongly convex in the middle, 

 finely punctulate, with short dark pubescence and rather long 

 black hairs on the sides ; it is shining black, with bluish reflec- 

 tions on the sides. Second and third tergites with a narrow, 

 but complete, yellow hind border; the third segment with the 

 peculiar, triangular area of P. dayak, situated at middle of hind 

 border and clothed by a soft, spongy membrane ; fourth segment 

 very narrow, entirely bluish ; ovipositor short and black, its basal 

 segment compressed, not depressed as usual. Venter black. 

 Legs rather stout, entirely black even on the coxae, and with 

 black pubescence; femora only a little dark brownish hear the 

 base above; the two basal joints of all the tarsi whitish yellow 

 and whitish pubescent, the last three joints deep black. 



Wings grayish hyaline, distinctly yellowish along the costal 

 cell. An irregular fuscous band extending over the base of the 

 first basal cell and over the ends of the second basal and anal 

 cells; a second rather broad brown band begins below the 

 brown stigma and, passing over the anterior cross vein, ends 

 a little after the fifth vein; along the costal border a series of 

 three dark spots in the form of three abbreviated bands, which 

 surpass only a little the third vein and are placed at the ends of 

 the first, second, and third veins; the intermediate one of these 

 spots sometimes continued to reach the more or less developed 

 fuscous border of the hind cross vein. Anterior cross vein long, 

 placed a little before the middle of the discoidal cell; third and 

 fourth veins straight and perfectly parallel; anal cell a little 

 shorter than second basal cell, its terminal vein being slightly 

 curved outward. 



Luzon, Laguna, Los Bafios (Baker). Mindanao, Butuan 

 (Baker) . 



185. Pterogenia tristis sp. nov. 



Very near P. luctuosa Hendel from Formosa, but at once dis- 

 tinguished by the much richer wing pattern. 



Male and female. — Length of body, 5 millimeters; of wing, 5. 

 Head as in P. valida, but the frons distinctly narrower, and the 

 vertical diameter longer than the horizontal one, the jowls nar- 

 rower. Frons yellow, with two black crossbands, one near the 

 vertex including the ocelli and the other a little distad of the 

 middle; these two bands dilated on the sides in the form of 

 spots and united with a dark middle line ; cheeks yellow and very 



