1904.] NATURAL SCIENCES OF PHILADELPHIA. 521 



longer than the prozona; median carina very distinct, sharp; lateral 

 carinse distinct anteriorly, rounded on the metazona, which latter is 

 very closely punctate; lateral lobes higher than broad, infe ' ^r niargin 

 obtuse-angulate, rounded posteriorly. Tegmina considerably exceed- 

 ing the apex of the abdomen and but very slightly short( r than the 

 tips of the posterior femora, subequal in width, the costal field mod- 

 erately expanded; apex obliquely rotundato-truncate. Wings equal 

 to the tegmina in length. Abdomen not recurved apically. Posterior 

 femora slender (for the genus), tapering through the entire length; 

 posterior tibiae slightly shorter than the femora. 



General color bistre; the top of the head, disk of the pronotum and 

 anal field of the tegmina broccoli-brown; lateral lobes of the prozona 

 and the gense shining blackish; face and antennae wood-brown, the 

 latter infuscated in the apical half. Pronotum with the lateral carinae 

 marked anteriorly with buff. Anterior limbs pale cinnamon. Pos- 

 terior femora blackish externally and inferiorly, except for a pregenicu- 

 lar annulus of ochraceous, superior and internal faces ochraceous with 

 four blackish bars, the two proximal ones of which do not join the black- 

 ish external face, their distribution being, one genicular, one post- 

 median, one pre median and the other basal; posterior tibiae blackish 

 proximally with a broad dull ochraceous annulus, followed by a black- 

 ish annulus, the remainder dull Isabella color suffused with blackish, the 

 spines all blackish apically ; tarsi ochraceous. 



Measurements. 



Length of body 22 mm. 



Length of pronotum, 5 



Greatest dorsal width of pronotum, 3 



Length of tegmina, 18.7 



Length of posterior femora 16 " 



The type is the only specimen of the species examined. 



Genua PLECTROTETTIX McNeill. 

 1897. Plectrotettix McNeill, Psyche, VIII, p. 71. 



Proposed to replace Plectrophorus McNeill (preoccupied) and includ- 

 ing P. viatorius (Saussure) and P. gregarms (Saussure). 



Plectrotettix viatorius (Saussure). 



1861. St[enobothrus] viatorius Saussure, Revue et Magasin de Zoologie, 

 2e ser., XIII, p. 317. ["In tota Mexico occurrunt et gregibus copiosus 

 campis damnuna inferrunt."] 



Guadalajara, Jalisco. June 28, July 17 and September 18, 1903. 

 (McClendon.) Four males, six females. 



