1916] Hood — Tico New Thysanopfera from West Africa 11 



This genus is closely allied to Acanthothrips, Eupathithrips, and 

 Sedulothrips, but differs from the last two in a number of characters 

 which Bagnall considers of family importance. From Acantho- 

 ihrips it may be separated by the long mouth cone and the com- 

 pressed and subcarinate dorsum of the head. It is the only member 

 of the Eupathithrips group occurring outside the Neotropical re- 

 gion. 



Pselaphothrips pomeroyi sp. no v. 



Female: Length about 3 nnn. Color dark blackish brown, with purple hj^po- 

 dermal pigmentation in head, thorax, and abdomen; antennae and legs concolorous 

 with body; tube paler in apical half. 



Head 1.44 times as long as wide, compressed and subcarinate above; cheeks 

 nearly parallel, not at all swollen toward base, anteriorly roundly converging to 

 eyes, set with a few small spiniferous. tubercles; vertex sulcate and nearly overhang- 

 ing in front of anterior ocellus; postocular bristles short, scarcely one-fourth as long 

 as ejes, dilated at tip. Eyes very finely and closely faceted, not at all protruding, 

 nearly 0.4 as long as head, well separated anteriorly, slightly reniform, showing 

 little tendency to surround the ocelli. Ocelli anterior, not set on an elevation, the 

 median one directed nearly forward and distinctly removed from the approximate 

 posterior pair. Antennse about 1.9 times as long as head, moderately slender, uni- 

 form dark blackish brown in color; segments 3-6 clavate, abruptly narrowed apic- 

 ally, urn-or vase-shaped, 3-5 about 2.7 and 6 about 2.4, times as long as wide; 7 

 fusiform-truncate, closely united to 8, which is conical; 4 slightly longer than 3; 

 sense cones long, slender, broad at base, those on segment 3 more than half the 

 length of segment; formula: 3, 1-2; 4, 2-2+i; 5, l-l+i; 6, l-l+i; 7 with one on 

 dorsum near apex. Mouth cone and palpi very long, the former acute and attain- 

 ing metasternum. 



Prothorax broadly arcuate (scarcely emarginate) in front, its median dorsal 

 length about 0.43 of that of head and 0.37 of the width across coxre; pronotum nearly 

 smooth, with faint anastomozing lines in posterior third and at sides, and with 

 rather conspicuous short pubescence; median line slightly chitinized; all usual 

 bristles present, and with an additional accessory pair arising mediad and cephalad 

 to the base of the outer posterior pair, all short, dilated at tip, equal to or longer than 

 postoculars, the outer pair at posterior angles longest. Pterothorax about equal 

 in width to prothorax, sides nearly straight, slightly converging posteriorly. Wings 

 long, closely fringed, fore pair with about 35 accessory hairs on posterior margin, and 

 of equal width throughout; [ore wings with the scale dark brown and in costal half 

 reticulated similarly to the mesonotum; a dark brown, stippled, granulate, cross 

 band occupies the second sixth, and a lighter brown cloud the apical two-fifths of 

 fore wing, these connected and at least partially traversed by the dark median vein, 

 and in addition connected along both margins of wing by a brown line; third basal 

 spine of fore wing, dark brown, long, slender, and slightly knobbed at tip, set in a 

 small, isolated, stippled, brown spot; first and second basal spines pale, short, stout, 

 and rather strongly dilated at tip, surrounded by an obscurely darkened and sparsely 

 stippled area. Legs moderately slender; fore femora not swollen, with an acute 



