442 BRITISH GENERA, IN THF. 



Thrips ulmi . Fabr. Sysi. Rhyng. 313. No. 5. 



Thrips corticis De Geer, 1 1 1. 1 1 , No. 3, Tab. I, fig. 8—12. 



Thrips, &c. . Geoffr. I. 384, No. 1. Tab. 7. fig. 6. 



Far. a. — Alata, elytris subflavescent"'ms. 



Far. /3. — Subaptera. 



Far. y. — Subaptera fusco-castanea. 



The male is much shorter than the female, with the fore thighs twice 

 as large, and the thumb, or tooth, on the inside of the fore foot 

 common to all of this genus, very tbick. The larva is very flat, 

 white ; with the head, a cordate spot on the prothorax, the antennae, 

 (except the two basal joints,) and the last two segments of the ab- 

 domen, blackish. 



Inhabits under the bark of old trees, feeding on mucor. 



Sp. 4. Phi. flavipes. Castanea, ano ferrugineo ; antennis 

 ante basin pedibusquejlavo-ferrugineis, femoribus posterio- 

 ribus basi fuscescentibus ; femoribus anticis incrassatis ; 

 elytris subjlavescentibus. 



Sp. 5. Phi. Statices. Alata atra, antennis medio, tibiis 

 anticis apice tarsisque fusco-palUdis ; femoribus anticis in- 

 crassatis ; pollice maris distincto, feminae obsoleto. 



Antennae short, thicker in the middle. Is always winged : the male 

 shorter than the female ; fore thighs twice as large, and the thumb 

 distinct. The larva is less depressed than that of Phi. Ulmi; 

 blood red, with the head, tail, antennae, and legs shaded black. 

 The blood of the perfect insect is red, like the larva. The egg is 

 shaped like that of Culex, being cylindric, rounded at one end, 

 and crowned with a knob at the other. 



Inhabits the flowers of Armeria maritima in myriads. I 

 have also found the larva on the same plant so early as March. 



Subs. BB. Capitis lateribus antrorsum convergentibus. 

 Sp. 6. Phil, coriacea. Capitis lateribus muricatis. 



The largest insect of the order. Pitchy black ; the 2d and 3d 

 joints of the antennae, and the base of those which follow, the feet, 

 fore shanks, and extremities of the others, pale yellow. The fore 

 thighs thick. The hairs along the sides of the head spring from 



