148 The Philippine Journal of Science 1917 



Wings rather long, with a strong yellow tinge along the fore 

 border and on the basal half; on the basal half some dark spots 

 and two broader dark bands, one intermediate and complete 

 below the stigma, and the other surrounding the posterior cross 

 vein; a dark stripe to the fourth vein in the hyaline space be- 

 tween the two bands and some uncertain spots in the apical 

 hyaline part. Veins yellow, the third and fourth straight and 

 parallel to the end ; anterior cross vein a little before the middle 

 of the discoidal cell ; anal cell not much shorter than the second 

 basal cell, with the terminal cross vein straight. 



Luzon, Laguna, Mount Maquiling and Mount Banahao 

 {Baker) . 



189. Pterogenia centralis sp. nov. 



Allied to P. luteipennis, but distinguished by the very different 

 coloration of mesonotum and scutellum. 



Female. — Length of body, 5.5 millimeters ; of wing, 5.5. Head 

 as in P. luteipennis, the shining occipital yellow border without 

 black spot in the dilated part; frons yellow, with an elongate, 

 double reddish brown spot in the basal part ; face with a rounded 

 black spot at end of the antennal grooves and with a narrow 

 black line, dividing the epistoma from the jowls without black 

 crossband. Antennae as in P. luteipennis, but the second joint 

 black and the arista more shortly plumose, the breadth of 

 feathers being only equal to the breadth of the third joint. 

 Mesonotum and scutellum black, opaque, with dense shining 

 yellowish pubescence; on dorsum a yellow stripe from the 

 yellow humeri to the suture, curved inward at end, and another 

 from the suture to the scutellum, a yellow notopleural stripe, 

 and below this two broad, parallel yellow stripes — one on 

 mesopleura, the other on upper part of sternopleura ; hairs of 

 pleurae whitish and yellowish. 



Scutellum yellow, with a basocentral, rounded black spot. 

 Squamae whitish; halteres yellowish. All the bristles black; on 

 scutellum a pair of long apical bristles and some other pairs 

 of shorter ones. Abdomen as in P. luteipennis, but the yellow 

 hind borders of second and third segments broader, and the 

 third segment with a middle longitudinal yellowish stripe; 

 pubescence black, but yellowish on the yellow parts; ovipositor 

 black, depressed; venter black, with black hairs. Cox?e black; 

 femora reddish brown with blackish stripes below and behind; 

 tibiae yellowish with black ends ; tarsi whitish, with the last three 

 joints black. Wings whitish hyaline with only the extreme base 

 less distinctly yellowish; three complete fuscous crossbands, 



