﻿748. 

 THRIPS DISPAR. 



Order Thysanoptera Hal. Homoptera Leach. 



Fam. Terebrantia. 



Type of the Genus, Thrips physapus Linn. 



Thrips Linn., DeGeer, Fab., LaL, Hal., Curt. 



Antenna approximating, inserted before the eyes, often as long 

 as the thorax, sparingly bristly, 9-jointed ; 2 basal joints the 

 stoutest, oblong, 3rd and 4th rather larger, obovate with a 

 gland at the apex appearing like a small joint, 5th obovate, 6th 

 elongate-ovate, truncated, the remainder tapering, 7th oblong, 

 8th minute, 9th tvv^ice as long, very slender, the apex pilose (4). 

 Labrum broad at the base, attenuated before (3). 

 Mandibles 2 long setaj, thickened at the base (5). 

 Maxilla broad, attenuated to the apex, which is narrowed 

 abruptly (m). Palpi placed neai* the middle on the outside, 

 conspicuous, triarticulate, joints oblong, 3rd rounded and pi- 

 lose (p). 



Labium short and stout, the base dilated, elongate-conic (2), 

 with a short Palpus on each side near the apex, which is rounded 

 and pilose (p). 

 Males smaller than the females. Head depressed (I profile), subo- 

 vate or oblong ; face inclining obliquely beneath, terminated by the 

 trophi, which unite and form a short beak, close to the anterior coxa : 

 eyes large, remote, coarsely granulated : ocelli 3, distinct, forming 

 a large triangle on the crown. Thorax suborbicular or semiovate : 

 scutel short sublunate. Abdomen long narrow and smooth, apex 

 ovate or conical, acuminated in the females, composed of 9 segments : 

 ovipositor incurved, compressed, received into the underside of the 

 Sth and 9th segments. Wings narrow, horizontal, incumbent and 

 parallel, but not meeting in repose ; generally 4, sometimes as long 

 as the body : superior sometimes coriaceous, ivith 3 longitudinal 

 nervures : inferior shorter, membranous, both with long hairy cilia. 

 Legs remote, anterior (6) very short and stout, hinder the longest : 

 thighs, anterior incrassated but compressed : tibiae, anterior with a 

 protuberance inside, and a curved claw at the apex, the others sim- 

 ple: tarsi very short, biarticulate , basal joint oblong, 2nd short, ve- 

 siculose : claws none. 

 Larvae and Pupae similar to the Imago ; the former softer, without 

 wings ; the latter less active, with rudiments only. 



DisPAR Hal. Ent. Mag. 3. 449.— Cwr^ Guide, Gen. 1048. 24, 



Male black, shining : antennae 8-jointed ? apex indistinctly ar- 

 ticulated : head ovate, truncated behind : thorax suborbicular, 

 sides foveolated : wings small ovate, whitish : antennae and 

 legs pale ochre, basal and 2 apical joints of former, thighs and 

 2nd tarsal joint brownish. Female, 3rd joint of antennae yel- 

 lowish, 4th darker : wings long narrow and dirty white, supe- 

 rior with a brown fascia across the middle, and an equal por- 

 tion of the apex of the same colour : legs yellowish, thighs and 

 apex of tarsi piceous, base of tibiae brownish. 



