1925 ] 
New N eotropical Thysanoptera 
59 
Eurythrips gracilicornis sp. nov. 
Female (macropterous). — Length about 1.1 mm. General 
color yellow, with pterothorax and tube dark brown; head 
brownish yellow, shading to dark brown at sides; legs nearly 
uniform yellow, femora lightly shaded with brown; abdomen 
brownish at sides and apically; antennae brown (excepting 
segment 3 which is clear yellow), segments 1 and 2 darkest, 1 
paler at base, 2 paler at apex, 4-6 paler at base and apex. All 
segments of antennae, excepting 1 and 2, very long and slender 
for the genus, 4 and 5 three times as long as wide. Mouth cone 
very short, broadly rounded, hardly attaining middle of pros- 
ternum. Bristles long and dilated at apex; prothorax with 
anterior angulars well developed and anterior marginals wanting. 
Fore tarsus with a long, hooked tooth. Wings brown, fore pair 
without accessory bristles. Tube very much shorter than head. 
Trinidad; C. B. Williams; swept. 
Distinguishable by the short mouth cone and tube, and the 
slender antennae. 
Lissothrips breviceps sp. nov. 
Female (brachypterous). — Length about 0.9 mm. Color 
dark brown with red subhypodermal pigmentation; segments 
1, 2 and 4-8 of antennae nearly concolorous with body, 2. slightly 
paler, 3 light gray, much the palest in entire antenna; legs dark, 
tarsi slightly paler. Head hardly 0.8 as long as wide; segment 3 
of antennae conspicuously small and weak. Prothorax with all 
bristles present and broadly dilated at tip. Fore tarsus unarmed. 
Tube about 0 . 8 as long as head, 1 . 4 times as long as basal 
width, which is distinctly more than twice the apical. 
Male (brachypterous). — Essentially like female but smaller. 
Trinidad; C. B. Williams; from dead branches. 
The antennal coloration, short head, and short, broad tube 
are distinctive. 
