172 The Philippine Journal of Science loi? 



species differs from both in color, wing venation, and a few 

 other characters. These differences may be summarized as 

 follows : 



1. Thorax smooth, shining, black; wings very narrow, about three times 



as long as broad; second marginal cell about twice as long as greatest 

 width; fourth f ureal (M i + 2) terminating in wing apex; male anal 

 valve almost quadrate; genal cones about one third as long as vertex. 



Trioza asiatica Crawf. 



2. Thorax punctate or rugulose, not smooth; light green or yellowish green; 



wings about three times c.s long as broad; second marginal cell about 

 two and one-half times as long as greatest width; fourth f ureal 

 Ml + 2) , extending to apex or near it. Male anal valve triangular. 

 Genal cones half as long as vertex. Trioza eiigeniae Crawf. 



3. Thorax punctate and brown with light stripes and blotches; wings 



about two and three-fourths times as long as broad; second marginal 



cell only a little longer than greatest width; fourth f ureal (M 1 + 5) 



terminating in front of apex with apex within second marginal cell. 



Genal cones strongly decurrent, fully one half as long as vertex or more. 



Trioza eugenioides sp. nov. 



All three of these species are probably gall-forming, as men- 

 tioned in the paper cited in the footnote. One very large female 

 in the collection, from Mount Banahao, Luzon {Baker), seems 

 to belong to a fourth species of this group, but I am deferring its 

 description until more specimens appear. 



Trioza divisa sp. nov. Plate I, fig. 5. 



Length of body, 2.1 millimeters; length of forewing, 3.7; 

 width, 1.5; width of head, 0.8. One half black and one half 

 light; head, thorax, base of abdomen, and legs dark brown or 

 black ; caudal half of abdomen white ; basal third of wings black, 

 remainder hyaline, the hyaline portion beginning at the white 

 portion of abdomen, thus dividing insect into anterior dark half 

 and posterior light half. Body robust; surface covered with 

 long slender hairs. 



Head strongly deflexed, not as broad as thorax. Vertex 

 distinctly longer than half its width, somewhat irregularly 

 convex, sparsely covered with long hairs, posterior ocelli not 

 elevated. Genal cones nearly as long as vertex, extending nearly 

 parallel to plane of vertex but below it. Eyes large. Antennae 

 about one and one-half times as long as width of head, whitish 

 except black at tip, with several very long hairs on each segment. 



Thorax robust, broad, large, arched; pronotum short and de- 

 pressed. Legs hairy, rather stout ; hind tibiae with small spur at 

 base and three thick spines at apex. Forewings about two and 



