. Bulletin. Natural history; Natural history. 366 Genus Trichothrips Uzel, 1895. Trichothrips americanus sp. nov. (Fig. 3). Female.—Forma brachyptera.—Length about 1. 7 mm. General color clear brownish yellow with more or less dark hypodermal pigmen- tation ; prothorax and basal abdominal segments slightly darkened with brownish black; tube tipped with gray. Head than wide; vertex elevated, rugose, sloping ab- ruptly to bases of antennae; cheeks rounded, faintly reticulate, sparsely spinose; postocular bristles slender, pointed. Eyes reduced. Ocelli want- ing. Antennas slightly
. Bulletin. Natural history; Natural history. 366 Genus Trichothrips Uzel, 1895. Trichothrips americanus sp. nov. (Fig. 3). Female.—Forma brachyptera.—Length about 1. 7 mm. General color clear brownish yellow with more or less dark hypodermal pigmen- tation ; prothorax and basal abdominal segments slightly darkened with brownish black; tube tipped with gray. Head than wide; vertex elevated, rugose, sloping ab- ruptly to bases of antennae; cheeks rounded, faintly reticulate, sparsely spinose; postocular bristles slender, pointed. Eyes reduced. Ocelli want- ing. Antennas slightly more than twice as long as head; segments 1 and 2 concolorous with body, shaded laterally with black; 3-8 uniform dark blackish brown, excepting extreme base of 3, which is yellow; 3 sub- conical; 4-7 oblong, pedicellate, subequal in length, but becoming gradu- ally narrower; 8 lanceolate, pedicel- late ; segments 3 and 4 each with two outer sense cones and one inner one; 5 and 6 each with one sense cone on either side of apex, the outer one on segment 6 very small. Mouth cone just attaining base of prostemum; labium broadly rounded; labrum pointed, surpassing labium by the length of the maxillary palpus. Prothorax slightly shorter than head, and (including coxae) about twice as wide as long; all spines present, long, pointed. Pterothorax about as long as, and usually some- what narrower than, prothorax. Wings short, attaining base of abdo- men. Legs about concolorous with body, all femora shaded laterally with brown or black; tarsal cups black; fore tarsi armed with a small, acute tooth. Abdomen large, heavy, about one and one-third times as wide as prothorax. Tube slightly shorter than head, twice as wide at base as at apex. Measurements:—Total length mm.; head, length .21 mm., width . 19 mm.; prothorax, length . 18 mm., width (including coxae) .38 mm.; pterothorax, width .36 mm.; abdomen, width . SO mm.; tube, length . 18 mm., width at base .098 mm., at apex .045
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
