266 "^^^ Philippine Journal of Science 1915 



Head distinctly narrower than thorax, rather large; vertex 

 concave on each side of median suture ; genal cones scarcely half 

 as long as vertex, broadly rounded, a little divergent, pubescent ; 

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

 slender. 



Thorax broad, long; pronotum large; prsescutum longer than 

 broad; legs moderately long; hind tibise with 4 black spines at 

 apex, 3 together and 1 alone ; wings hyaline, very long, acute at 

 apex, more than half of length beyond abdomen; marginal cells 

 long. 



Abdomen rather short, especially in male; forceps short, 

 slender; anal valve larger, triangular, with a petiolate attach- 

 ment at base. Female genital segment very short; dorsal valve 

 longer than ventral; both subacute. 



Described from 9 males and females from Peradeniya, Ceylon, 

 collected by A. Rutherford on May 12, 1913, in galls on leaves of 

 Eugenia malaccensis. "The galls were so numerous that they 

 formed a continuous gall on the upper surface of the leaf." 



This and the next species are closely related both in structure 

 and habits to two American species of the same genus, Trioza 

 magnolise Ashmead and T. koebelei Kirkaldy. An Asiatic genus, 

 Cecidotrioza Kieffer, bears a close resemblance to these gall 

 makers and is probably congeneric. 



Trioza asiatica sp. nov. 



Allied closely to T. eugenise, but differs markedly as follows: 

 Color shining black or daijk brown; middle and hind tibiae and 

 antennae whitish, except at tip; body distinctly more slender; 

 head nearly as wide as thorax, because of the slenderer thorax; 

 genal cones smaller, about one third as long as vertex, orange to 

 brown; antennae twice as long as width of head; thorax more 

 slender. Wings similar, a little shorter (4.2 millimeters), differ- 

 ing slightly in venation as follows : Second marginal cell scarcely 

 twice as long as greatest width; first marginal cell smaller, 

 narrower; cubital vein about twice as long as first f ureal. Ab- 

 domen more elongate. Male anal valve much larger, more 

 rectangular rather than triangular. Female genital segment 

 large, nearly as long as rest of abdomen, thick at base, converging 

 to acute apex; dorsal valve a little longer than ventral. 



Described from two males and two females from Butuan, Min- 

 danao, P. I. {Baker), and one male from Mount Maquiling, 

 Luzon, P. I. {Baker) . Judging from its close resemblance to the 

 foregoing species, it is probable that this is a gall-making species. 



