430 Pomona Coixeck Journal of Entomology 



Trioza tripunctata (Fitch) Riley 



(Fig. 152, A: 153, G; 154, A; 155, A) 



(Psrlla tn'l^uiictata Fitch) ( Xon Trio~a tripunctata Low) 



Length of body (female) 2.8 mm.; (male) 2.3 mm.; length of forewing 

 3.5 mm.; greatest width 1.5 mm.; width of vertex between eyes .49 mm.; 

 with eyes .80 mm.; general color brown to dark brown, dorsum black: head 

 lighter: antennre yellowish, black at tip. 



Head defle.xed, rather coarsely punctate, with eyes not as broad as thorax. 

 Posterior margin of vertex narrowly elevated over middle half, slightly 

 arcuate; vertex raised plate-like on each side of median suture; with a shallow, 

 oblique depression on each side extending from posterior marginal ridge 

 toward front and eyes ; anterior margin of plates down-curved and emarginate 

 at median suture. Eyes very prominent; anterior ocellus imbedded between 

 conical insertion of antenna? and base of facial cones. Facial cones medium 

 in length, rounded apically. fpiite divergent, subvertical, moderately pubescent. 

 Antennje of usual trioaal form, yellowish, except two apical segments and 

 tips of intermediate segments black. 



Thorax coarsely punctate, quite strongly arched. Pronotum moderately 

 short, distinctly depressed below head and dorsulum : dorsulum quite heavy, 

 ascending strongly, roundly acute cephalacl, about as long as scutum. Meta- 

 sternal spurs short. Wings quite large, roundly acute apically, almost two 

 and one-half times as long as broad, broadest across middle of first marginal 

 cell, distinctly narrowed in basal half; hyaline, except three brown bands 

 along first and second cubital and radial veins and covering both marginal 

 cells; radius not quite as long as second cubital, flexed midway; marginal 

 cells subequal and similar in shape ; third furcal vein very short ; ventation 

 brown, conspicuous. 



Male. — Genital segment prominent, not as long as tw^o preceding segments ; 

 claspers stout, simple, long : anal valve large, extending beyond base of 

 claspers. Pubescence short and sparse. Female. — Genital segment very 

 long, almost as long as rest of abdomen, very slender and acute; dorsal plate 

 slightly overreaching ventral and less acute ; genital pore scarcely one-fourth 

 as long as dorsal plate ; ventral plate very acute ; ovipositor very long and 

 acute (exserted in type female) ; pubescence sparse and short. 



Redescribed from one male and one female taken by Mr. F. A. Sirrine 

 at Jamaica, Long Island, October 11th. 



This species was described briefly by Fitch in 1851 as follows: "Wax 

 yellow, dorsum black; legs and antennae pale yellow, the latter black at the tips; 

 elytra hyaline, nerves brown, beyond the furcation widely margined with 

 smoky fulvous ; a blackish dot on the middle of the terminal margin of each 

 of the inner apical cells. Length 0.16 inch." The specific name was derived 

 from the three marginal dots common to nearly all the Triocas. In 187/ i.. . 

 Franz Low described a new European Psyllid as Trio::a tripunctata. not know- 

 ing of course that there was another Trioca of the same name then classed 

 as a Psylla. In 1893 Riley ])laced Fitch's Ps. tripunctata in the genus Trioza, 



