1925 ] 
New N eotropical Thysanoptera 
67 
St. Thomas, West Indies; C. B. Williams; swept from grass 
and in epiphytic bromeliad on tree. 
Male (brachypterous) . — Very much like female in color and 
structure, but smaller and slenderer. 
I am not perfectly satisfied with the assignment of this 
species to Barythrips , but have put it here until the female of 
Barythrips sculpticauda Hood and Williams shall have been 
made known. Both species agree in most of the important 
details of structure, and furthermore have the intermediate 
antennal segments dark at base and pale apically — ah inversion 
of color pattern which is unusual. The mode of insertion of the 
eighth antennal segment in heterocerus is of interest. 
Pygothrips conifer sp. nov. 
Female (macropterous) . — -Length about 1.3 mm. Brown, 
shading to almost black in segments 8 and 9 of abdomen; tarsi 
and articulations of legs paler; “tube” bright brownish orange, 
tipped with black; segments 1 and 2 of antennse clear yellow, 3 
yellow at extreme base, remainder of antennae shading to dark 
blackish brown in last segment; wings light brown, darker at 
base, with a pale median streak. Head fully as wide as long; 
eyes about 0.4 as long as head and two-thirds as wide as their 
interval. Prothorax 0.6 as long as head, all bristles pointed. 
Wings without accessory hairs on posterior margin. Fore tarsus 
with a short, strong tooth. “Tube” sub-conical, fully 1.4 times 
as long as basal width, sides nearly straight. 
Trinidad; C. B. Williams; from dead branch of Lagers- 
troemia infested with bromeliads. 
More closely allied to metulicauda Karny from Java, than 
to rugicauda Hood, the genotype. This and the following are 
the first species of their group to be recorded from the New 
World. 
Pygothrips nigricauda sp. nov. 
Female (macropterous). — Length about 1.7 mm. Cofor 
dark brown, shading to opaque coal-black in “tube” and distal 
