98 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



Zias and Icoehelei. The genus is probably not distinct from Trioza, 

 but no disposal of it will be made until specimens of its species are 

 available for comparison. 



Two species have been described in the genus, one from Argentina, 

 South America, and the other from Asia. Both are gall-forming 

 (as are also the two Trioza species mentioned above), the Argentine 

 form being on Baccharis. 



CECroOTRIOZA MENDOCINA Kiefier. 

 Ceeidotrioza mendodna Kiefper '10 : 372. 



Locality. — Province of Mendoza, in Pedragal and Chacras de Coria, 

 Argentine RepubUc; December to last of June. 



Galls on Baccharis salicifolia. The flower head is greenish, becom- 

 ing enlarged, thick, three to four times normal size, 8 to 9 mm. long, 

 and almost as thick; the bractlets are enlarged and produced, linear 

 and curled at the tip (Kieffer '10: 372). 



Genus NEOTRIOZELLA Crawford. 



Head as broad as or broader than thorax, latter narrow; genal cones 

 long, usually slender, not at all divergent, but oiosely appressed from 

 base to tip, acute at apex, usually vertical; vertex more or less plane; 

 antennae more than twice as long as width of head. Pronotum short, 

 descending strongly cephalad, much depressed below level of head 

 and prsescutum. Fore wings elongate; hind tibiae with three spines 

 at apex within. 



Type of genus. — Neotriozella immacidata Crawford. 



The members of this genus are very pecuHar, and easily distin- 

 guished from other species by the remarkable form of the genal 

 cones. The original name Neotrioza was found to be preoccupied by 

 Neotrioza machili Kieffer (1905), and was consequently changed to 

 Neotriozella (Crawford 'lib: 503, note). 



SYNOPSIS OF SPECIES. 



0^. Genal cones longer than vertex; forewings two and a half to three times as long 

 as broad. 

 b^. Genal cones slender, acute at apex, whitish; vertex reddish with light margins; 



antennae rather slender immaculata Crawford. 



b^. Genal cones moderately thick, less acute at apex, strigate, dark brown; vertex 



brown; antennae moderately thick sculptoconus, new species. 



a^. Genal cones not longer than vertex; forewings three times as long as broad; 

 vertex and genal cones black laticeps Crawford. 



NEOTRIOZELLA IMMACULATA Crawford. 



Figs. 205, 213, 216, 332, 539. 



THoza immaculata Crawford '10a: 233. 

 Neotrioza immaculata Crawford '11a: 450. 

 Neotriozella immaculata Crawford 'lib: 503. 

 Neotriozella ottawanensis Patch '12b: 231. 



Length of body 1.7 mm.; length of forewing 2.7; width of head 0.59. 

 General color reddish brown to red; thorax lighter than abdomen; 



