Pomona College Journal of Entomology 435 



Female. — Abdomen robust. Genital segment large, subglobose, greatly pro- 

 duced caudad ; dorsal plate slightly shorter than ventral ; genital poi c very 

 small ; both plates produced into an ovipositor sheath longer than genital seg- 

 ment basally; sheath and style together almost one-fourth as long as rest ot 

 body. Pubescence very sparse and brief. 



Described from three females in the C. F. Baker collection, two taken 

 in Colorado and one in Santa Clara County, California. 



This species is very closely related to Trioza collaris Crawford, Ijut diti'ers 

 in the following characters : T. collaris — Facial cones not broadly rounded ; 

 proepimeron short, not visibly as long as episternum ; dorsulum with an acute 

 epiphysis cephalad ; both pronotum and dorsulum very sparsely pubescent ; 

 ovipositor sheath and style about as long as rest of genital segment. 7". long- 

 istylus — Facial cones broadly rounded apically ; proepimeron visibly fully as 

 long as episternum ; dorsulum without epiphysis cephalad ; pronotum and dor- 

 sulum not pubescent ; ovipositor sheath and style twice as long as rest of 

 genital segment. 



The two species are, however, of the same type and should not have been 

 so far separated in the preliminary synopsis. 



Trioza proximata n. sp. 

 (Fig. 153, J; 155, F) 



Length of body (female with ovipositor) 3.4 mm.; (without ovipositor) 2.7 

 mm.; male 2.4 mm.; length of forewing 3.7 mm.; greatest width 1.5 mm.; 

 width of vertex between eyes .44 mm.; with eyes .78 mm. General color 

 light greenish yellow. 



Head moderately deflexed, with eyes not as broad as thorax, punctate. 

 Posterior margin of vertex narrowly elevated ; vertex not raised plate-like ; 

 discal area excised and impressed very similarly to T. longistvliis ; elevation 

 along median suture quite prominent ; anterior margin slightly emarginate at 

 median suture. Facial cones short, rounded apically, more or less straight 

 and parallel on basal half of inner margin, somewhat divergent distally, 

 vertical to subvertical, moderately pubescent. Antennae inserted on frons and 

 base of facial cones laterad. Eyes prominent. 



Thorax arched, more coarsely punctate than vertex. Pronotum moderately 

 long, depressed below head and more or less below dorsulum ; with a fovea 

 on each side above pleurites. Dorsulum large, quite acutely rounded cephalad, 

 sometimes almost pointed. Meta-sternal spurs very short. IVings hyaline, 

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

 broadly rounded apically ; radius longer than second cubital ; fourth furcal 

 more than half as long as second cubital 



Male.- — Abdomen slender. Genital segment large, prominent ; anal ventral 

 sclerite small. Genital plate large, rounded ; claspers long, slender, simple, 

 curved forward and inward; penis long, slender; anal valve large, longer than 

 claspers, almost straight on anterior margin, posterior margin broadly rounded, 

 except distally; with a small epiphysis distally. Pubescence sparse and brief. 



