284 The Philippine Journal of Science 1921 
as long as vertex, subporrect, slightly curved dorsad at apices. 
Length of antennae about one and one-fifth times width of head ; 
diameter of segment I about one and one-third times that of II ; 
of II, about one and two-thirds times that of III ; the rest of the 
segments distad subequal in diameter to III. 
Thorax robust, slightly arched, about one and one-third times 
as long as broad. Pronotum about one-seventh as long as meso- 
praescutum, slightly deflected but confluent with surface of lat- 
ter. Mesopraescutum about one and one-sixth times as long as 
wide; cephalic margin broadly angular, caudal broadly curved. 
Mesoscutum remotely crescent-shaped, about twice as wide as 
long. Cephalic margin of mesoscutellum about one-third width 
of mesoscutum. Wings large, hyaline, membranous, with a faint 
yellowish tinge, about three times as long as wide, subacute at 
apex; wing veins subconcolorous with body; cubital petiole and 
pterostigma wanting ; Rs slightly shorter than M ; the two veins 
running subparallel to each other ; first marginal cell about two 
and a half times as large as second; a small, inconspicuous, 
acutely subtriangular, marginal spot, consisting of minute 
dark brown dots, between branches of media, another between 
branches of media and cubitus, and a third between branches of 
cubitus. Hind legs about one and one-third times as long as 
thorax; hind tibiae equipped with a short basal spur and three 
distal, broadly curved spines. Middle legs subequal in length to 
thorax, slightly longer than forelegs; ungues broadly curved. 
Abdomen subequal in length to thorax, about twice as long 
as broad. Anal valve slender, subconical, about twice as long 
as diameter at base, broadly curved caudad near apex. Genital 
forceps slightly shorter than, and subequal in basal diameter 
to, anal valve, less acutely pointed distad than latter, curved 
caudad near apex. Genital segment, genital forceps, and anal 
valve beset with much longer hairs than the rest of body. 
Female . — Dorsal valve about two-fifths total length of abdo- 
men, about one and two-fifths times as long as diameter at 
base, subconical. Ventral valve slightly shorter than dorsal, 
about three times as long as diameter at base ; apical half about 
three-fifths as thick as basal. Dorsal and ventral valves more 
thickly beset with longer hairs than the rest of body. 
Cotypes. — No. 18174, in College of Agriculture, University 
of the Philippines. 
Nymph ( earlier instar ). — Length of body, 1.44 millimeters; 
width of head, 0.5 ; length of antennae, 0.26; width of thorax, 
including wing pads, 1.2; length of forewing pads, 0.84, width, 
