. Bulletin du laboratoire de l'Etat de l'Illinois d'Histoire Naturelle. L'histoire naturelle. 371 les ailes antérieures ; veinless apical avec une frange de poils double huit, et avec l'échelle basale noire. Fémurs concolores avec tête et thorax, tibias et tarses de couleur jaune brun. Abdomen grand ; côtés sub-parallèle en ce qui concerne le segment 6, de là, virant carrément à la base du tube. Tube autour de trois cinquièmes de ce long que la tête, ab- ruptly rétréci à l'apex, et légèrement rétréci au milieu. Mesures : longueur totale de 1,8 mm. (1.71-1.89 mm.) ; chef, longueur 32 mm, largeur 19 mm. ; prothorax, longueur 27 mm, largeur (y compris coxae) 4.

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. Bulletin of the Illinois State Laboratory of Natural History. Natural history. 371 veinless; fore wings with an apical double fringe of eight hairs, and with the basal scale black. Femora concolorous with head and thorax; tibiae and tarsi yellowish brown. Abdomen large; sides sub-parallel as far as segment 6, thence curving roundly to base of tube. Tube about three-fifths as long as head, ab- ruptly narrowed at apex, and slightly narrowed at middle. Measurements:—Total length 1.8 mm. (1.71-1.89 mm.); head, length .32 mm., width .19 mm.; prothorax, length .27 mm., width (in- cluding coxae) .40 mm.; pterothorax, width .41 mm.; abdomen, width .45 mm.; tube, length . 13 mm., width at base .082 mm., at apex .041 mm. Antennae: 1, 41 /t; 2, 52 /<; 3, 57 fx; 4, 55 ji; 5, 54 p.; 6, 54 jx; 7, 49 H; 8, 54 /z; total, .42 mm. Male.—Slightly smaller than female (total length about 1.4 mm.). Abdomen more slender, tapering more gradually toward apex. Described from two females and five males, taken by the writer in June on a window of a wood-shed, Urbana, Illinois. This species could not possibly be confused with any other de- scribed one, distinguished as it is by characters of generic significance. Neothrips gen. nov. (Fig. 6), {ukos, new; 6pc<p, thrips.) Head almost one and one-half times as.long as wide; cheeks par- allel, sparsely spinose; vertex ele- vated, narrowed anteriorly, not overhanging. Antennae stout, eight- segmented, about one and three- fourths times as long as head, inserted beneath vertex; segments 7 and 8 distinct, but united into a heavy, compact club, and with a straight, comb-like, ventral row of either nine or ten bristles; seg- ments 2 and 7 slightly longer than the intermediate ones, which are almost exactly equal in length. Mouth cone long, slender, acute, surpassing base of prostemum; labrum pointed. Prothorax large, trapezoidal, armed with five pairs of bristles. Legs short, stout; fore tarsi armed with an acute tooth which in the male is l

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