178 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



llabUat.—W iennn (Heeger, v. Frauenfeld), Finland (Renter), St. 

 Petersbnro- (Kegel), (lerniany (Jordan, Bohls), Bohemia (Uzel), United 

 States: Washington, District of Columbia; Amherst, Massachusetts. 



The early stages are described as follows: 



^^^^/._The eggs are nearly membranous, greenish white, elongate- 

 ovate, -i's'" long, half as broad. 



Zarva.—ljSiVVse are milky white, nearly cylindrical; only the last 

 three abdominal segments taper gradually to a blunt point; they are 

 about li'" long, t as thick. The head is inverted conical, a little more 

 slender hut noticeably longer than the breadth of the al)domen; mouth 

 parts are thin, horviy, yellowish, pointed, snout-like. Eyes are on the 

 sides of the head, circular, not raised; relatively large and clear red. 

 The antennte are thread-like, white with gray points, five segmented, 

 somewhat longer than the head; first three segments small, cup-shaped, 

 of equal size; fourth, spindle-shaped, about as long as first three 

 together; fifth is gray, conical, very pointed, somewhat longer than 

 the fourth. 



The thorax is somewhat longer than the antennas, swollen, fiat 

 beneath ; prothorax is rounded-triangular, somewhat shorter than the 

 pterothorax, the segments of which are grown together, and are 

 elongated-rectangular and rounded. The legs are close together, with 

 very large coxse; nearly as long as the antennae; middle pair noticea- 

 bly shortest, hind pair longest; femoi'a shorter and thicker than tibi;e, 

 which are cylindrical; tarsi very short, indistinctly two segmented. 



Abdomen spindle-shaped, nearly as broad and somewhat more than 

 twice as long as the entire thorax; the nine segments are hardly per- 

 ceptibly marked, equally long and set at sides with single, knobbed 

 hairs. 



Nyiiqtli or p>q>"- — The nymphs in the last days before their trans- 

 formation are whitish, fusiform; their eyes are raised, round, and 

 red; antennae indistinctly eight segmented, laid back over the head 

 near one another; wing sheaths lying at the sides of the abdomen, 

 slender, bottle- shaped, reaching to the fore edge of the sixth segment 

 and set with many transparent, white hairs, as is also the spindle- 

 shaped abdomen; the hind edge of the next to the last and the end of 

 the last segment set with single, knobbed hairs. 



Genus THRIPS Linnseus. 



Ocelli present. Antennas seven segmented (style one segmented). 

 Maxillary palpi three segmented. Prothorax regularly somewhat 

 longer than the head; two long spines alwaj^s present upon its pos- 

 terior angles. Fore legs usually unarmed. Wings usually present, 

 moderately broad, with fore fringe developed and veins set with short 

 spines. 



The species belonging here have the power of springing. 



