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 slightly longer than wide; vertex elevated, rugose, sloping ab- 
ruptly to bases of antennze; cheeks rounded, faintly reticulate, sparsely 
spinose; postocular bristles slender, pointed. Eyes reduced. Ocelli want- 
ing. Antenne 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 prosternum; 
labium broadly rounded; labrum 
pointed, surpassing labium by the 
length of the maxillary palpus. 
Prothorax slightly shorter than 
head, and (including coxe) about 
p 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- 
Fic. 3 men. Legs about concolorous with 
Trichothrips americanus, female. a, head and body, all femora shaded laterally 
prothorax, brachypterous form; }b, tip of f : : b, 
right antenna, dorsal view, brachypterous with brown or black: tarsal cups 
ae ye macropterous form: ()-D-H. “black: fore tats! armed witha small 
aah s 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 1.68 mm.; head, length .21 mm., 
width .19 mm.; prothorax, length .18 mm., width (including coxe) .38 
mm.; pterothorax, width .36mm.; abdomen, width .50 mm.; tube, length 
.18 mm., width at base .098 mm., at apex .045 mm. Antenne:1, 36 yu; 
2,90 #3 3, 02 wed, 59m 5,62 5 76;.99 ws 7, S57: S, Ses bOteales sae senanme 
Forma macroptera.—Similar to forma brachyptera in size; general 
color darker, the entire body shaded with grayish brown. 
