THEIPIDiE. 547 



In PMo'ea the body is much flattened, and expanded laterally 

 into leaf-like flaps. The antennae are three-jointed, the first 

 joint of which is longest. P. corticata Driiry is a peculiar 

 form, which occm^s in Brazil. 



Arma spinosa Dallas (Fig, 550, b ; a, beak, seen from be- 

 neath ; c, beak of Euschistus punctipes Say) is useful since it 

 preys on the larva of the Doryphora. 

 Another bug of this group, the /Stiretrus 

 fimhriatus Say (Fig. 551) has similar 

 habits. 



In Thyreocoris the wing-covers are 

 nearly covered by the scutellum, which « 

 is wider behind than before. The body 

 is short and transverse, being broader than long, and scale-like 

 or semicircular in shape. Thyreocoris Msteroides Harris re- 

 sembles a Hister beetle, and is greenish black, with dull honey 

 yellow antennae. The species of Corimelcena are of much the 

 same form, and usually shining black. C. puUcaria Germar, 

 according to Riley, injures strawberry-vines and grape-vines in 

 Illinois. In the genus Tetyra the scutellum covers nearly the 

 whole abdomen, but leaves the side of the wing-covers exposed. 

 The antennae are slender ; the first joint is longer than the 

 second, the third being the shortest, and the fifth is twice 

 as long as the fourth. Tetyra marmorata Say is a variegated 

 species, the costal margin of the wmg being 

 provided with transverse fuscous lines. 



The genus Sc^itellera is remarkable for the 

 great size of the scutellum, whence its name is 

 derived. This piece, which is elongated trian- ' 

 gular, covers not only the entire abdomen, but 

 also the wings ; the antennae are five-jointed, 

 the two first joints small, the threfe last ones J^'s-^^i- 

 long, quite large. The species are adorned with gay metallic 

 colors, and are especially abundant in the Island of Sunda. 

 (Gerstaecker.) Scutellera virkh'punctata Say is piceous, with 

 green impressed punctures. It is seven-twentieths of an inch 

 long, and is found in Florida. 



Thripid^ (Thripsides) Fallen. This interesting group 



