70 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



Head small, flattened, not deflexed, not as broad as thorax; vertex 

 flat, with a broad, shallow depression on each side of median line, 

 smooth; genal cones about two-thirds as long as vertex, extending 

 forward in same plane with vertex, divergent, subacute at apex, 

 slightly pubescent. Clypeus far back, with a conspicuous cavity 

 in front of it between gense. Antennae more than three times as long 

 as width of head, slender. 



Thorax not arched, flat, narrow; pronotum moderately long, 

 anterior epiphysis smaller than in two preceding species. Legs 

 slender. Wings nearly four times as long as broad, very narrow, 

 narrowly rounded at apex, apical third brown, basal two-thirds 

 transparent, membrane coarsely punctate; first marginal cell larger 

 than second; radial sector long. 



Genitalia. — Male. — Genital segment small; anal valve much longer 

 than forceps, fusiform, narrow at apex, with processes ; forceps small, 

 short, slender, acute at tip, strongly arcuate; pubescence short. 



Described from one male from Palm Beach, Florida (H. G. Dyar), 

 no data. 



Type.— C&t. No. 18081, U. S. Nat. Mus. 



This species bears some resemblance to members of the European 

 genus Floria. 



Genus PARATRIOZA Crawford. 



Head more or less deflexed ; vertex distinctly raised plate-Hke, 

 with margins sharply defined, sometimes briefly pubescent, and 

 sometimes variegated in color (as in cockerelli); genal cones short, 

 often very short, acute, directed forward and outward; anterior 

 ocellus best visible from in front, beneath slightly overhanging ver- 

 tex. Antennae slender. Clypeus large, easily visible from in front. 

 Dorsum of thorax not strongly arched. Wings membranous, usually 

 more than two and a half times as long as broad. Hind tibiae with 

 two apical spines on inner side, and sometimes a spur at base. 



Type of genus. — Paratrioza cockerelli Sulc. 



SYNOPSIS OF SPECIES. 



a^. Wings maculated, acute at apex; radial sector short and straight; second marginal 

 cell much smaller than first; vertex and no turn not conspicuously striped and 



banded maculipennis Crawford. 



a^. Wings not maculated, subacute at apex; Rs long and curved. 

 b^. Body large; length to tip of folded wings at least 4 mm; vertex and notum not 

 or only slightly variegated; hind tibiaswith large spines at apex and a small 

 spur at base; wings large; first marginal cell larger than second. 



arbolensis Crawford. 

 b~. Body small; length to tip of wings only 3 mm; vertex and notum very con- 

 spicuously striped and banded with white or yellow; hind tibiae with small 

 apical spines and no basal spur; wings small, marginal cells subequal. 



cockerelli Sulc. 



