144 nRt>rn dk i iioi'TUU. 



^ tJnllidiP. 



Tni» fumily (the Cratihopprrs) is charactcrizrti liy tin- i>os5Msiun of four Jointed tarsi, long 

 •ctaceou5 antcnnm, a large vertical head ami convex forehead, vertical prominent eyes, a 

 thorax flat above, and its sides suddenly detlexi-d iiml rounded l*ehind : IxkIj more or less 

 com|>rev<nd ; the hre^Lsl furnislu-<l with t\v<> o\ul folintetl |>lal<-jt ; elytra coriaceous, de- 

 scending the sides ; niMlomen ruiupresseil slightly, und furni»he<l in the male with two 

 proc«Nses, and in the female with an o>ii"-silor. The legs are long l^ehind, with ihickmtd 

 thighs and spines. 



Pi.ATVPiivLi.iM roscAviM ( Harris). Katydid. ( Plate ix, fig. 1.) 



Color of the body \ta\e brown ; elytra and wings, grass-green. Antenna? long, setaceous, 

 yellowish, dilated at the l>u.se ; eyes prominent, hemisjihcrical ; head greenish, 

 brownish on the top, front ridged, terminating Ixtween the antennie in a triangular 

 apex : thomx gn-^-iiixh, rough, its integument siddle >hajK'«l In males the miLsical 

 api>aratU5i>ccupiesairiangular s|>ace, covered with aden.s*- {>archment-like membrane. 

 Elytra narrowed Ix-fore, diluted In-hind and laterally w idest near the extn-mity of the 

 al>domen.and longer than the wings : nervures consist of one principal trunk, M:nding 

 off numen>us branches below at right angles to it. Wings narrower and shorter than 

 the wing covers ; branches of the nervures two Legs green : tibia* (jiuuirate ; each 

 corner s«'rrate or short spinous. Body of the male over one inch long. The female^ 

 furnished with a curveii ovijxisitor (see the figure) al>out one fourth of an inch long, 

 and Ixth sexes with two projections U-tween the foreleg*. The wing-covers, in their 

 natural {>osition, form a convex covering extending in the female far enough to cover 

 the ovij>ositor. 

 The katydid is in its state of i>erfection in September : the female, alx-ut this time, 

 deposits her eggs in a row uixm the twigs of the tree bhe inhabits. Dr. Harris descril>es 

 the musical instrument as consisting of a i>air of taborets : they are formed of the mem- 

 brane already sp^iken of. w hirh is situated at the base of the wing-covers. This parchment- 

 like membrane is stretched ujx.n a strong, half oval frame, fitteil into the space at the l>as« 

 of the thorax. Their notes are emitted during the evening and night, and sometimes in 

 dark lowering weather in the iifterpart of the <lay. It is not common, neither is it ea\v to 

 discover the retreats of this singular in^e^t : the color of their wing-covers favors their 

 concealment among the foliage of the trees. 



The katydid feeds xxyon leaves ; but it would not comport with the truth, to charge it 

 with doing much damage to the fanner. 



