FAMILY LOCUSTID^. 145 



PllVLLOrXKRA OBLONGIFOLIA. 



This species diflers from tlie preceiliiiK in hnvinR tlie wing-covers narrower, ilat and not 

 concave, tlie true wings extending beyond tliein, ami they are dellected down tlie sides 

 abruptly. The most distinctive characteristic is the ai)Sence of the projecting integuments 

 between the lorelegs. 



PlIANEROPTKKA ANCUSTIIOLIA ( IlarHs). ( PlatC JX, fig. 1.) 



Color brownish green : wings and wing-coAers 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 terminaterl 

 in the male by a short jirojection, 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 tlifferent. 



Locustidae. 



TiiK 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 l)e regarded in this 

 instance ; and, besides, the name harvest-fly is sufliciently approiniatc. 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 antennte are shorter, and usually lililbrm ; the elytra longer 

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

 distorted. The ovipositor of females is not exserted. 



Genus LOCUSTA. 

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

 ovate ; thorax fiunished with a central sharp ridge ; elytra longer than the abd.»meu : 

 four anterior legs subequal, short ; posterior long, and formed Ibr leaping ; tibise all 

 furnished with a double row of spines. 



LOCCSTA CAROLINA. ^ pl;,fp j^, fijr. fl.) 



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

 spt^tted with brown or blackish. Length an inch and a half; breadth, or expansion 

 of wings, nearly three inches. Common by roadsides. 

 [ AoiiKi'LTcnAL KEroRr-- Vol.. V.J 19 



