1927] 
New Neotropical Thysanoptera 
241 
thorax, and abdomen strongly and prominently reticulate with 
heavy black lines, not roughened between the lines of reticula- 
tion, except for a few dots in basal reticules of head. Head 
broad, cheeks rounded and swollen, with a strong neck-like con- 
striction which is bounded in front by a heavy chitinous line. 
Antennae separated by about 1.7 times the width of segment 1, 
formed almost as in phaseoli , 7 forked trichomes on 3 and 4 ex- 
ceptionally long, that on 4 attaining apex of segment 5. Meta- 
scutum without differentiated triangle; metascutellum strongly 
reticulate. Wings of fore pair with about 22 inconspicuous 
brown bristles on costal margin, averaging in length less than 
the width of wing, fringe fully twice as long; anterior vein usually 
with one similar bristle at the fork and four in distal half; post- 
erior vein with about eight and principal vein with six. Ab- 
domen of normal form, opaque black, reticulation coarse and 
heavy, not absent from middle portions of tergites but extending 
entirely across them and strongest just beyond the irregular, 
subbasal, transverse line; segment 10 with an irregular dorsal 
suture in apical half; all abdominal bristles pale and short. 
Measurements of holotype (9): Length 1.08 mm., head, 
length 0. 105 mm., greatest width (behind eyes) 0. 176 mm., least 
width (near base) 0.135 mm.; eyes, length 0.085 mm., width 
0.045 mm., interval 0.087 mm.; prothorax, length 0.102 mm., 
width 0.201 mm.; pterothorax, width 0.267 mm.; fore wings, 
length 0.780 mm., width at middle 0.041 mm., near base 0.067 
mm.; abdomen, width 0.300 mm., segment 8, length to fringe 
0.076 mm.; segment 9, length 0.087 mm.; segment 10, length 
along median dorsal line 0.036 mm. 
Antennal segments: 12345678 
Length ( M ) 24 41 59 49 36 28 12 25 
Width ( M ) 24 30 22 23 20 17 8 5 
Total length of antenna 0.27 mm. 
Male (macropterous ) . — Length 0.87 mm. Color of body and 
appendages like that of female. Tergite 9 with the two pairs of 
bristles slender, the inner pair shorter, slenderer, and with their 
bases more distal, the four thus being disposed on a semicircle. 
7 See Psyche, vol. XIX, PI. 8, fig. b; 1912. 
