1925 ] 
New N eotropical Thysanoptera 
55 
Trinidad; C. B. Williams; “along midrib on under surface 
of leaves of undetermined plant.” 
Like A. alternatus in color, but with the eyes distinctly 
prolonged on ventral surface of head. 
Adraneothrips abdominalis sp. nov. 
Female (macropterous) . — Length about 1.1 mm. Bico- 
lorous; head, thorax, and abdominal segments 1 and 7-10 
brown, head darkest, no subhypodermal pigmentation; antennse 
with most of segment 3 and bases of 4-6 pale; segments 2-6 
of abdomen pale yellow, or 6 lightly brownish; tibiae pale yel- 
low or grayish white; femora not, or only slightly, darker. Eyes 
prolonged on ventral surface of head beyond their posterior 
dorsal margins. Anterior marginal bristles of prothorax long 
and knobbed. 
St. Thomas, West Indies; C. B. Williams; grass. 
Easily separable by the abdominal coloration and prolonged 
eyes. 
Adraneothrips alternatus sp. nov. 
Female (macropterous). — Length about 1.1 mm. Bico- 
lorous; head, pterothorax and abdominal segments 4 and 5 and 
8-10 light brown, much darker than intervening portions and 
with bright crimson subhypodermal pigmentation; prothorax 
pale yellow, with a narrow band of crimson pigmentation along 
sides; legs pale; antennae with bases of segments 3-6 pale. Head 
1.1 times as long as wide; eyes not prolonged on ventral surface 
of head, about equal in width to their interval and nearly as long 
as their distance from posterior margin of head. 
Male (macropterous). — Smaller and more slender than 
female, and usually paler in coloration; segment 8 of abdomen 
usually much paler than 9, often concolorous with paler portions 
of abdomen. 
Trinidad and Panama; C. B. Williams; common on dead 
banana leaves, on upper side along midrib. 
