14G NOTES ON THE ORDER THYSANOPTERA. 



examined, which would probably have produced subapterous 

 individuals, these being the most numerous. The perfect insect 

 exceedingly resembles the last species, but is longer, a female of 

 Phi. ulmi measuring ^ of an inch in length, by i in breadth ; 

 while one of Phi. pini, scarcely so broad, was ^ in length. The 

 fore-thighs, besides, are less thickened, which difference is particu- 

 larly observable in comparing the males. The winged females 

 evidently differ by the darker colour of their wings, the upper 

 pair being brown in the outer half, with the hind margin paler, 

 and the lower having that margin alone brown. 

 Inhabits under the bark of old pine stumps in profusion. 



Gen. IV.— Thrips. 



Sp. 2. T/ir. L. cerealium. 



The larva is deep yellow, with the greater part of the head, and two 

 spots on the prothorax, dusky. The antenna? and legs have alter- 

 nate rings of pale and dusky. The pupa paler yellow, with the 

 antennae, legs, and wing-cases, whitish, the latter reaching to the 

 middle of the abdomen. The eyes are dusky red, and the simple 

 eyes sometimes indicated by red dots. 



Sp. 5. Thr. A. nitidula. 



Shorter than Thr. rufa, dusky chestnut, with the eyes and incisures 

 of the abdomen darker; the antennae (except the sixth joint) 

 with the shanks and feet, paler. 



Sp. 7. Thr. pkalerata. 



The larva is entirely reddish orange. 



Is common on the flowers of Vicia sativa. 

 Sp. 10. Thr. atrata. 



Abounds most of all upon Spergula nodosa. 



Sp. 15«. Thr. PersiccB. 



The larva is entirely light yellow, not unlike that of Thr. ulmi- 



foliorvm, but without the small spines at the tail. 



A small species, found on the diseased leaves of peach-trees. 



Gen. V. — Melanthrips. 

 Sp. 1. M. obesa. 



Is common in the flowers of Sinapis nigra. 



