1936] New Thysanoptera from the United States 3 
directly laterad of median ocellus ; postocular and genal setae 
minute and pale, two pairs of the former, three pairs of the 
latter. Eyes rather large and prominent, somewhat pro- 
truding, two-thirds as long as head and 0.8 as wide as their 
interval. Ocelli subequal in size, about 13q in diameter, pos- 
terior pair about 18p apart and 10^i from median ocellus, 
which is directed forward and overhanging. Antennx three 
times as long as head, rather stout, segments III and IV 
with the usual forked trichomes short, IV and V with pedicel 
short. Mouth-cone about attaining posterior margin of 
prosternum (maxillary palpi not clearly visible in the type 
material) . 
Prothorax about 1.4 times as long as head and about 1.4 
times as wide as long ; pronotum almost smooth, with a few 
faint transverse lines posteriorly, of which one between the 
inner pair of major setae is most distinct; all setae pale yel- 
low, the outer pair at posterior angles 50p, inner 44p, be- 
tween the latter and midway between the heavy transverse 
line of sculpture and the posterior margin only one pair of 
minor setx , these about 24q apart and subequal to intero- 
cellars and a number of other setae scattered over pronotum. 
Fore wings nearly 11 times as long as width just beyond 
scale, recurved at tip ; setae pale in color, anterior vein with 
a sub-basal group of three arising opposite distal half of 
scale, followed by a second group of three in the dark por- 
tion of wing and by three more in distal half of wing, the 
last two in the series closer together; posterior vein with 
three nearly equidistant setae in distal half of wing; costal 
margin with about 16 setae. 
Abdomen of normal form, about 1.24 times as wide as 
pterothorax, nearly free of sculpture, posterior margin of 
ter gum VIII without comb; tergum X not divided along 
median line ; dorsal setae on IX and X about 68q long, those 
on IX much stouter. 
Measurements of holotype ( $ ) : Length about 0.88 mm. 
(distended, 1.01 mm. ; head, length 0.065 mm., width across 
eyes 0.103 mm., width across cheeks 0.099 mm., width at 
base 0.093 mm. ; eyes, length 0.044 mm., width 0.032 mm., 
interval 0.040 mm. ; prothorax, median length of pronotum 
0.092 mm., width 0.130 mm. ; pterothorax, width 0.164 mm. ; 
fore wings, length 0.423 mm., width just beyond scale 0.039 
