432 Pomona College Journal of Entomology 



tlnis making two members of the gemis bear the same name. According to 

 Section 69 of the code of nomenclature now in preparation by the Entomolog- 

 ical Society of Washington the tripunctata of Low must be changed. In 1908 

 the Japanese entomologist, Kuwayama, described a new Psylla, naming it 

 Ps. tripunctata. Since this name is already synonymical in that genus from 

 Fitch's original description, this name can not be attached to the new Japanese 

 species. This may become instead Psylla kmcayaiiiai n. n. 



Trioza salicis Mally 

 (Fig. 152, B; 154, D; 155, B) 



Length of body 1.9 mm.; length of forewing 3.0 mm.; greatest width 1.3 

 mm. ; width of vertex between eyes .40 mm. ; with eyes .68 mm. General 

 color orange yellow to brown, notum and head darker ; antennae black in 

 apical half. 



Head deflexed, very finely punctate, with eyes not as broad as thorax. 

 Posterior margin narrowly elevated over middle three-fifths, only slightly 

 arcuate ; discal area with broad shallow depression on each side of median 

 suture, and bi-lobately projecting, with anterior ocellus imbedded under it at 

 base of facial cones ; vertex not raised plate-like. Facial cones rather short, 

 acute, almost parallel on inner margin and scarcely divergent, almost vertical, 

 sparcely pubescent apically. Antennae inserted on front below eyes, within : 

 insertion yellow, the rest of vertex, front and facial cones black or dark 

 brown. 



Thorax arched, rugosely punctate. Pronotum short, much depressed below 

 dorsulum and head ; prcepimeron very distinctly visible. Dorsulum qviite 

 large, strongly ascending, rather acute anteriorly; lighter in color on anterior 

 portion than posteriorly ; meta-sternal spurs short. IVings hyaline, about 

 two and a half times as long as broad, broadest across first furcal, subacute 

 apically ; anal vein very heavy and dark ; venation very light brown. 



Fenmle. — Genital .segment very short, scarcely longer than two preceding 

 tergites or anal ventral sclerite ; dorsal plate overreaching ventral, almost 

 glabrous, pubescence very sparse and brief; genital jjore almost half as long- 

 as dorsal plate ; ventral plate acutely beaked apically. 



at -Ames, Iowa, and from several females collected at .Mgonquin. Illinois; 

 all specimens were taken either in September or October. 



This species was first described by Mally in 1895 from specimens taken 

 on willow (Salix) at Ames, Iowa. His description is taken up mostlv with 

 coloration and wing venation, two characters which are of little specific value 

 in this genus. The male genitalia are scarcely described and not figured, and 

 unfortunately there is no male specimen in this collection. Consequently this 

 character must be descriiied at some fnttire time. 

 Trioza minuta Crawf. 

 (Fig. l.=;2, C, D; 154, B; 155, C) 



Length of body 1.7 mm.; length of forewing 2.6 mm.; greatest wl.'.tii 

 .9 mm.; width of vertex between eyes .40 mm.; with eyes .62 mm. (kner.il 

 color very light orange yellow throughout ; antenna? black apically. 



