3.'5() PliOCKETHXaS OF THE NATIONAL MUSEUM. . vol.xx. 



109. MELANOPLUS MARGINATUS. 



(I'lates I, fiK.i; XXIl, flg.n.) 



Pezotettix marfjhiafits Scuddkk!, Anu. Rep. <'hi«'f Kng.. 187fi ("1876), p. 50t; 



Ann. li'ep. V. S. (Jeo<jr. Siirv. lOOth Mer., i 76 (1H76), p. 284 ; liKiNKU, Hep. 



r. S. Knt. ("omiii., Ill, ].. 51» ^l^<83). 

 Eiiprepocnemia occidcntalis l?inin*r!, MS. 



Of uiediuni size, slender. Head not ])rominent, but slightly ]>r()- 

 jfctinjr, the face retieatin<^ more than usual, nearly at right angles with 

 the not very steeply declivent fastigiuni; vertex very gently tunud, 

 scarcely elevated above the pronotuiu, the intersi)ace between the eyes 

 a little broader than (male) or twice as broad as (female) the first 

 anteunal joint; fastigiuni rather deeply (male) or slightly (female) sul- 

 cate; frontal costa percurrent, eciual, about as wide as the interspace 

 between the eyes, shallowly sulcate at ami below the ocellus, punctate 

 throughout; eyes not very large, moderately prominent in the male 

 only, a little longer, especially in the male, than the intraocular i)ortion 

 of the genae; auteuuae at least three-fourths (male) or about four- 

 sevenths (female) as long as the hind femora. Pronotum rather long, 

 the dorsum ecjual, with slightly sloping sides, distinct but rather slight 

 and equal iiiedian carina, and distinct though very obtuse lateral car'- 

 nae; hind border scarcely angulate. Prosternal spine rather small, 

 bluntly subconical, a little retrorse; intersi)ace between mesosternal 

 lobes more than twice as long as broad (male) or a little longer than 

 broad (female). Tegmina either surpassing considerably the hind 

 femora, moderately broad, subcciual beyond the basal expansion of the 

 costa, well roumled apically {M. m, amitliiSj Plate I, fig. /), or slightly 

 longer than the £>ron(,tum. ovate lanceolate, apically acuminate, over- 

 lai>piug, the costal margin very strongly arcuate, about twice as long 

 as broad (.If. m. pauper), brownish testaceous; wings a little shorter 

 than the tegmina, am^^le, faintly infumate apically and anteriorly, the 

 veins and cross veins black or blackish luscous. Fore and middle 

 femora considerably tumid in the male; hind femora rather slender, 

 compressed; hind tibiae with eleven to thirteen spines in the outer 

 series. Kxtremity of male ..bdomeu clavate, somewhat recurved, the 

 su])raanal jdate triangular, the apex acutangulate but blunt, the sur- 

 face tectate with a moderately deep and narrow Miedian sulcus in the 

 basal two thirds; furcula consisting of a pair of slight but coarse 

 approximate denticulations; cerci straight, rather stout, moderately 

 long, noticeably but broadly constricted in the middle, the tip larger 

 than the base, gibbous, the whole scarcely depressed, curving slightly 

 downward beyond the middle; subgeuital plate small, subconical, 

 ending in a minute tubercle. 



General color dull pale olivp ous brown, slightly darker above, with 

 abroad black stripe, occasio.i..;y obsolescent, extending from behind 

 the eye along the upper half of the lateral lobes of the prozona; pleura 



