K0.1W4. REnsrny OF rnr. MKr.iynri.f—srrimnu. 139 



h-. Int«*rviil lu'tvreeu inPMoNtcnial IoIipm <»f imiU* n littl« Ibhh tlum twice 

 as lon^ >iH broad; prdiiotiitii iiiiicoIorniiH on iUhU, any lat«*rul Htri|>«'M 

 l>eiii<Lr cotitiiM'd to tli*^ {XHitioii of l:it« ral cariiian. 



i'. i'l'O/ona nt' male I'tM^bly li>ii^itii<liiial ; npiial margin <*l° hiiIi- 

 genital plate coiiHitlfralily elevated and tiiiurate; rureulu fornietl of 



apleally reetan^jfulato lobes 12^. ,»/«i?T«ifii ([». 'MVJ). 



i'. I'rozonn of male distinrtly 1on;;itiu1inal ; apbal margin of hiiI>- 

 ^enital plate considerably prolon)!e<l and Hubtnbereiilate; furnila 



formed of roiindnd lolies >Yitli a .slight pndougation 



ll".». nlhdveil" (p. 370). 

 /-. Interval between ine«ostern»l l(d)e« of male Hnbipiatlrate; <»f female 

 traiiNVerse; proNtermil spine short; te^mina niaeiilate with ronndisli fiis- 

 couf* Mpots; eyes of male and In-ad i)rominent. the froiit margin of the pro- 

 notnm tlurin^ to receive thi- head ^UH. Tnnrt ulatiiM Mcri«'H). 

 «j' . «>f large si/e; fiiriiila pi«-ti«'nt as a pair of very small dentirulatiiniH; 

 apirul margin of male eerei broadly ronvex, ferbly emarginate on the 



lower half i;{(>. arhoreua (p. 'M'2). 



g'. Of nu'diiim size; fnreula wnnting; apical margin of male rerci 

 angulato-conve.v with no inferiorennirgination. IIU. imnctitlatuM (p. 374). 



1. LAKINUS SERIES. 



Tn this small jumI coiiipjict jj^roiip the prozoiui of the male is loiifritu- 

 (liiiai, and the inieiapaee between the incsosternal lobes in tlie same 

 sex lonj;er than broad, sometimes twiee as lonj:^ as broad. The anten- 

 nae are rather short. The te«j^miui are but little lonjjer than the pio- 

 iiotum, overlapping, and apically acuminate. The hind tibiae are jjlau- 

 eous (or ])ale red) with nine to twelve (normally ten) spines in the ouier 

 series. 



The supraanal plate is aubtrianuular, with rather plane surface, 

 except for the rather prominent rid«^es borderinj^ an<l forming- between 

 them the median sulcus; the furcula consists of a pair of pointed slen- 

 der teeth but little longer than the last dorsal segment; the cerci are 

 very pe<'uliar, enlarging and bullate beyond the base, but witlu angu- 

 lar mjirgins, sulcate inferiorl}', compressed but longitudinally convex 

 exteriorly, abruptly narrowing beyond the middle and incurved, ending 

 ill a superior, short, tlattenetl linger directed toward the tip of the 

 supraanal jilate; the subgenital plate is very short and apically very 

 liroad, subconical, with a strongly and abrui)tly elevated though 

 laterally brief ai)ical margin. 



The three species beh)nging here are rather bulky insects, rather 

 above the medium size for the genus, and they range from southwestern 

 Nebraska and Colorado to central Mexico. 



I. MELANOPLUS MARCULENTUS, new species. 



(Plate X, fig. 1.) 

 Pezoiettix marciilentiis Bruxf.rI, MS. 



Brownish fuscous, often more or less testaceous. Head brownish 

 testaceous, tending to tlavons above, where there is a rather broad 

 posteriorly enlarging median streak and a broad submedian brownish 



