. 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 mm. ( mm.); head, length .32 mm., width .19 mm.; prothorax, length .27 mm., width (in- cluding coxae) .4
. 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 mm. ( 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 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 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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Keywords: ., bookcentury1800, bookdecade1870, booksubjectnatural, bookyear1876
