FAMILY LOCI'STIDJJ. 145 



Phylloptera oblongifolia. 

 This species differs from the preceding in having the wing-covers narrower, flat and not 

 concave, the true wings extending beyond them, and they are deflected down the sides 

 abruptly. The most distinctive characteristic is the absence of the projecting integuments 

 between the forelegs. 



Phaxeroptera angustifolia (Harris). ( Plate ix, fig. 1.) 



Color brownish green : wings and wing-covers green, the former narrow, their upper and 

 lower edges being nearly parallel, forming an organ equal in width except at and 

 towards the base, shorter than the wings and rounded behind. Abdomen terminated 

 in the male by a short projection, which curves upward. The wings do not conceal 

 the body. Length of the body, three-fourths of an inch ; the whole length, about 

 the same as the katydid. 

 The habits of the three foregoing species are much the same, each kind coming to per- 

 fection in September ; but the sounds they emit are different. 



Locustidae. 



The name locust is applied usually in this country to our harvest-fly, which is commonly 

 called the seventeen year locust. The term locust, however, is here improperly applied, in- 

 asmuch as the insects which have been known from time immemorial as locusts belong to 

 a different order from the harvest-flies. The rule of priority should be regarded in this 

 instance ; and, besides, the name harvest-fly is sufficiently appropriate. The true locusts, 

 on the other hand, have been called grasshoppers ; a term which, by better usage, belongs 

 to the green insects of which the katydid is an example. The true locusts possess the 

 following characters : their antennae are shorter, and usually filiform ; the elytra longer 

 than the body, though, in forms removed from the typical, they become abbreviated and 

 distorted. The ovipositor of females is not exserted. 



Genus LOCUSTA. 



Antennse filiform, inserted into a slight depression between the eyes : head large ; eyes 

 ovate ; thorax furnished with a central sharp ridge ; elytra longer than the abdomen : 

 four anterior legs subequal, short ; posterior long, and formed for leaping ; tibia? all 

 furnished with a double row of spines. 



Locvsta Carolina. ( Plate ix, fig. 9.) 



Color brown, variegated with darker spots : wings black, margined with yellow ; apex 

 spotted with brown or blackish. Length an inch and a half; breadth, or expansion 

 of wings, nearly three inches. Common by roadsides 

 [Agricultural Rei-ori — Vol. v.] 19 



