62 
Psyche 
[February 
Strongly suggestive of A canthothrips and its allies in the 
armature of the apex of the fore femur and the general details of 
body structure, but differing from them all in having the fore 
tibiae armed with several teeth. In several respects it approaches 
Machatothrips , in which, however,' the fore tibiae are unarmed. 
Ischyrothrips and Macrothrips lack the subapical femoral tooth. 
Eupathithrips has the prominent femoral tooth, but the cheeks 
are set with large spiniferous tubercles, and the urn-shaped 
intermediate antennal segments are provided with exceedingly 
long, slender, sense cones. 
Pristothrips albipunctatus sp. nov. 
Male (macropterous). — Length 3.0 mm. Color dark brown, 
abdominal segments 3-7 each with a pair of small, snow-white, 
lateral spots; intermediate antennal segments yellow, irregularly 
mottled with brown, 4-6 with a touch of dark blackish brown at 
extreme base; femora brown; fore tibiae yellow, mottled with 
brown, mid and hind tibiae brown, distinctly yellowish at either 
end; tarsi yellow. Head about 1.8 times as long as wide, with 
two pairs of long, stout bristles in basal two-fifths of cheeks, the 
apical bristle longer. Prothorax about 0.6 as long as head; 
bristles at anterior angles exceedingly slender, nearly as long as 
prothorax, blunt; bristles at posterior angles two-thirds as long, 
much stouter, blunt; all other bristles wanting. Fore wings 
with about 30 accessory hairs; two outer subbasal bristles long 
and pointed, the other shorter and blunt. Fore femur with two 
subapical teeth on inner surface, the basal one largest and tri- 
angular; fore tibia with a row of three large, stout teeth along 
inner surface, the basal one paired with a fourth one standing 
alone in another row; fore tarsus with a very long, stout, straight 
tooth. Tube two-thirds as long as head, 2.5 times as long as 
basal width, which is fully twice the apical. 
Trinidad; C. B. Williams; on bark and faggots. 
Pristothrips aaptus sp. nov. 
Female (macropterous). — Length 3.2 mm. Color dark brown 
or black, with intermediate antennal segments irregularly slightly 
