288 Annals Entomological Society of America [Vol.1, 



3-5 clavate; 6 subclavate; 7 sub-cylindrical, pedicellate; 8 lanceolate; segments 

 1 and 2 nearly concolorous with body, 2 slightly paler apically; segments 3-G 

 with respectively their basal two-thirds, three-tifths, two-fifths, and one-third, 

 pale yelloAv; remainder of antenna dark blackish brown; all sense cones long 

 and slender; formula as for I. armatus sp. nov. Mouth cone short, broadly 

 rounded, reaching about to middle of prosternum. 



Fig. 10. 



1. — Idolothrips tuberculatus sp. nov., female, head and prothorax, xOO. 

 (J. D. H., del.) 



2. — Idolothrips tuberculatus sp. nov., male, a, head, x67; b, right fore 

 leg, x60. (J. D. H., del.) 



Prothorax about as long as width of head, and (including coxje) about twice 

 as wide as long, with a median groove; surface reticulate; coxal spine and the 

 two notal pairs near the posterior angles, prominent; all others lacking (?). 

 Pterothorax sub-rectangular, about two-thirds as long as wide, and slightly 

 broader than prothorax. Wings large, powerful, closely fringed, and washed 

 with brown at base; principal vein of both pairs extending about to middle; fore 

 wings with a blackish brown area in front of the black anterior vein, with the 

 sub-apical fringe on the posterior margin double for about forty hairs, and with 

 the most distal of the three basal spines fully as long as the prothorax. Inner 

 lower surface of fore femora each with a large prominent semicircular projection ; 

 fore tarsi armed each with a short, acute, hooked tooth, the apex directed 

 forwards on a line parallel to the tarsus. 



Abdomen large, heavy, lanceolate, slightly wider than pterothorax and 

 about 3.3 times as long as its greatest width; widest at segments 2 and 3, thence 

 tapering nearly evenly to base of tube. Tube slightly shorter than head, 

 tapering evenly from base to apex ; surface not spinose ; terminal bristles shorter 

 than tube, black at base. Spines on segment 9 about equal in length to tube, 

 brownish; spines on basal abdominal segments short, colorless. 



Measurements: — Total length, 3.8-4.3 mm. ; head, length .64-. 70 mm., width 

 .28 mm.; prothorax, length about .27 mm., width (including coxae) .55 mm.; 

 pterothorax, width .65 mm.; abdomen, width .75 mm.; tube, length .60 mm., 

 width at base .137 mm., at apex .07 mm. Antennae: 1, 64/(; 2, 92/i; 3, 224/«;. 

 4, 196,u; 5, 168,«; 6, 115/t; 7, 78/(; 8, 92,«; total, 1.02 mm., width 53/i. 



