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AcRiDiUM ALUTACEUM. Hams. 

 Leather-colored Orassliopper . 



Dirty brownish yc41ow, a paler yellow stripe ou the top of the 

 head and tliorax ; a slightly elevated, longitudinal line on the top 

 of the thorax ; wing covers semi-transparent, with irregular brown- 

 ish spots ; wings transparent, uncolored, netted with dirty yellow ; 

 abdomen, with transverse rows of minute blackish dots; hind 

 femora, whitish within and without, the white portion bounded by 

 a row of minute distinct black dots, and crossed, herring-bone 

 fashion, by numerous brown lines ; hind tibitt reddish, with yellow- 

 ish-white spines, which are tipped with black. 



Length to the end of abdomen, one and three-fourths inches. 



AcuiDiUM RUBiGiNOSUM. Harris. 



Light rust red, somewhat uniform. Wing covers opaque, rather 

 paler on the overlapi)ing position, without spots, or sprinkled over 

 with dim, small, dusky spots. Wings transparent, slightly red- 

 dish towards the tip ; veins blackish ; posterior femora reddish ; 

 the flat disk whitish, with a row of black dots above and below ; 

 apex with a lunate black spot on the side. Spines of the tibiae 

 whitish, tipped with black. 



Length of female about one inch and a half, — male much 

 smaller. 



Genus Melanoplus. Stal (1873). 



Eyes nearly equal in the sexes, never broader than the length of 

 the cheek ; no distinct lateral carinie ; mesosteruum and metaster- 

 num together longer than wide ; upper margin of tlie hind femora 

 smooth ; lirst joint of hind tarsi of the same length as the last 

 joint, and a little stouter ; pulvilli between the claws, large ; last 

 joint oT the abdomen of tiie male much swollen. 



The species may be separated as follows : — 



f Wins covers shorter than the al)cloineu, or of the same lengtli . 2. 

 I Wing covers mucli longer tlian tlie abdomen .... 5. 

 / Median carina distinct on the front lobe of tlic prouotum . . 3. 

 I Median carina indistinct or wanting on front lobe of the pronotuin, 4. 

 f With a yellow stripe along the sides .... femorattis. 

 I With no yellow stripe along the sides .... punctuhttus. 



f Wing covers as long as the abdomen colUnus. 



\ Wing covers nmch shorter than the abdomen . . . rectus. 



Anal cerci pointed at Die tip femur-rubntm. 



:\nal cerci broadly rounded at the tip . . . . . atlanis. 



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