406 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



Thorax 2.7 mm. long and 1.5 mm. wide, pale ocliraceous yellow in 

 ground color; mesonotum densely covered with whitish dusting and 

 with short whitish appressed hairs except the very narrow bare and 

 shining posterior margin; mesonotum marked with three vittae, 

 golden to reddish brown dusted, all equal in width, slightly narrower 

 than the white dusted vittae among them, and narrowing towards 

 anterior margin: a median vitta extending from anterior margin to 

 scutellum, two lateral vittae extending from anterior margin to pair 

 of long-oval black spots between upper postalar and prescutellar 

 bristles; dorsocentrals inserted in the lateral brown vittae, and prescu- 

 tellar ones in middle of the white median vittae; black spot beneath 

 base of wing is relatively large and quadrangular. 



The brownish yellow thoracic bristles are long and strong. Two 

 pairs of mesopleural bristles are present, lower pair but slightly shorter 

 than upper. Dorsocentral pair inserted in first third of distance 

 between transverse suture and transverse supra-alar line. Apical 

 pair of scutellar bristles slightly divergent. On the ochraceous yeUow 

 pleura three black markings: a double one on inferior part of dorsal 

 and ventral pleurotergites, a large one above hind coxa, and a broad 

 vitta on middle of sternopleura, which in the specimen examined 

 extends from anterior to posterior margin of pleura, and is inter- 

 rupted at its middle by a brown stretch. 



Scutellum shining ochraceous yellow, with some black hau-s at 

 hind margin; postscutellum with two long-triangular lateral black 

 spots, between them a small ochraceous yeUow spot, whitish dusted; 

 mediotergite entirely reddish brown, shining and translucent. 



Coxae and legs testaceous yellow, with brownish yellow bristles 

 and hairs, except anterodorsal row of rather closely spaced, short 

 brownish black bristles. 



Halteres ochraceous yellow. 



Wing with the characteristic pattern of the genus; bands intensively 

 colored; apical band of this specimen distinctly separated from costa 

 by a pale linear margin, and in the three proximal bands there is 

 much more dark yellow color than brown; basal band rather well 

 developed but does not attain posterior wing margin, forming a large 

 broad yellowish brown transparent spot on each side of apical 

 process and petiole of anal cell; costa not blackened above the black 

 spots on humeral cross-vein and at tip of subcosta. Stigma 2.8 times as 

 long as wide basally. First costal section 0.88, second 1.91, third 1.0, 

 and fourth 0.68 mm. long; first section of fourth longitudinal vein 

 1.75, penultimate 0.42, and ultimate 1.44 mm. long; inner cross- vein 

 (ta) about as long (0.43 mm.) as distance between cross-veins, outer 

 cross-vein 0.82 mm. long, less oblique than ta; anal cell together 

 with its 0.54-mm.-long apical process 1.20 mm. long (whole anal cell 

 only 2.2 times as long as apical process). 



