ORDER III) SA YOPTERA. 







Ordeb VII. Thysanoptera.* 



iBepresented by the lit up of which Thrips 



type, and placed by some among the Hemiptera, to which 

 they seem allied, il may be said that though 



the head ends in a .-hurt beak, yet these ins< 



ffer from the bugs in having maxillae bear 



t-jointed palpi, while the labial palpi arc present, 

 and, though very short, are composed of from two 

 to three joints. The order derives its name from 

 the long delicate fringe on its long, narrow, and 

 often reinless wings. In some sp the wh 



are wanting, at least in the males. The abdomen, 

 in certain species, ends in the males by a slender 

 joint, and in the females by a 4-valved borer. 



The eggs are somewhat like tho Hemiptera, 1" 



cylindric, round at one end and crowned with a knobat the 

 other. The larva and pupa are both a and in the 



rather sluggish pupa the antennas are turned back on the 

 head, while the liinlis and wings are enclosed in a thin 

 filmy membrane; the feet end in bulbous en 

 hence the name "bladder-footed" (Physapoda) applied to 

 the group by Burmeister. 



The wheal Thrips, Limothrips 'imn Haliday, is in- 



jurious to wheat; Thrips striat - (l - troys 



onion-plant-. These insects injure plants by puncturing 

 and killing the leaves; all the species are minute, and I 

 is known of them in the United Stat< -. 



Family Thripidae. -Characters of the order as given ab 



* Si.u i i in Won 



Haliday, A H. An epitome of the British genera in the order Thy- 

 sanoptera (Entomological Mag., i 



Packard. A. S (Standard Natural History, se< 1888 



contains a list of described N. A. species by Th. 



Reuter. o. M. Thysanoptera Fennica. 



Ul.iaain, w. H. Embryology of Physapoda M In Russian). 



