116 The Philippine Journal of Science im 



a^. Marginal cross vein short, perpendicular, forming a right angle with the 

 first longitudinal vein; base of second posterior cell more drawn 

 inward than that of third; thorax ochraceous, with a middle, longi- 

 tudinal black line; wings hyaline; legs yellowish familiaris 0. S. 



a'. Marginal cross vein long, placed obliquely, seemingly the prolongation 

 of the first longitudinal vein incurved toward the second. 

 6\ Wings hyaline, with a more or less intensive yellowish tint; body 

 entirely ochraceous, without black markings, 

 c'. Wings with a very faint yellowish gray tint, only a little more in- 

 f uscated at fore border and apex ; bases of second and third poste- 

 rior cells on the same line - opaca sp. nov. 



c^ Wings with an intensive yellow tint and with a brown border around 

 the apex; base of third posterior cell more drawn inward than 



that of second marginalis sp. nov. 



b'. Wings brown or blackish; body bright orange, with deep black mark- 

 ings; bases of second and third posterior cells on the same line; legs 

 blackish. 

 d\ Wings brown, with a distinctly darker apex; abdomen with only the 



tip black termitina O. S. 



(f. Wings uniformly blackish; abdomen almost entirely deep velvet- 

 black semperi O. S. 



121. Libnotes opaca sp. nov. 



Entirely opaque orange-yellow, with the genitalia dark brown ; 

 wings hyaline, with a pale yellowish tint. 



Male. — Length of body, 10.5 millimeters; of wing, 13. Head 

 entirely yellow, with the rostrum brownish; palpi black; anten- 

 nae black, the scape and the first joint of flagellum somewhat 

 yellowish. Thorax and scutellum uniform bright orange, entirely 

 opaque, destitute of any black or brown marking. Halteres 

 yellow, with brown knob. Abdomen colored like the thorax, 

 even on venter; forceps brown, with the underplate dark yellow. 

 Legs wanting in the type ; coxse and trocanters bright orange. 



Wings with only a light yellowish tinge, with an elongated, 

 less distinct, stigmatic grayish spot and the extreme tip a little 

 darkened. Marginal cross vein prolonged, seemingly a continua- 

 tion of the first longitudinal vein ; discoidal cell much narrower 

 at base than at end, hind cross vein placed on its middle ; second 

 and third posterior cells of the same length, 



Luzon, Laguna, Mount Maquiling (Baker) . 



The present species is closely allied to L. familiaris Osten 

 Sacken, differing in the prolonged marginal cross vein and in 

 the opaque, unstriped thorax. Allied also to L. rufa de Meijere, 

 but distinguished by the wings not being infuscated and by the 

 base of the third vein not being margined with fuscous. 



122. Libnotes marginalis sp. nov. 



Very near L. opaca, but of greater size and distinguished by 

 the wings being yellowish and bordered with black at tips. 



