THRIPID^. 



547 



1 



InPJiloea 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 Drnry is a pecnliar 

 form, which occurs 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 

 Jtmbriatus Say (Fig. 551) has similar 

 habits. 



In Corimelcena 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. Corimelcena nitiduloides Wolff re- 

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

 yellow antennae. The species of this genus have much the 

 same form, and ai*e usually shining black. C. pidicaria Ger- 

 mar, 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 marniorata Say i-< 

 a variegated species, the costal margin of the 

 wing being provided with transverse fucous lines. 



The genus Scutellera 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, 



KiiT 551 



the two first joints small, the three last ones 

 long, quite large. The species are adorned with gay metalli? 

 colors, and a,re especially abundant in the Island of Sundr 

 (Gerstaecker.) No species oiSmteUera occur in America. In 

 the group or family Arthropteriim of Fieber the scutellum is 

 still larger than in Scutellera. 



Thripid^k (Thripsides) Fallen. This interesting group 



