23 



CoNOCEPHALUS ROBusTus. ScucMer. 



" Either pea-green or dirty brown ; tubercle of the vertex tipped 

 with black, not extending, or but very faintly and narrowly, 

 down the sides ; lateral carinre of prothorax, pale yellowish ; wing 

 covers dotted with irregularly distributed black dots, most con- 

 spicuous in the brownish individuals. In form, as in coloration, 

 this species is much like C. ensiger. The shape of the conical 

 projection of the vertex is the same, or a little stouter ; it is a 

 larger species, much broader and stouter than it, the wings 

 broader, and, when compared with the hind femora, a little longer 

 than they are in C. ensiger ; the spines upon the under side of the 

 hind femora are larger than there, being noticed easily with the 

 unassisted eye ; the ovipositor of the female is much shorter than 

 in G. ensiger ; and, finally, the insect is much broader across the 

 mesothorax, with a heavier sonorous apparatus in the male ; wing 

 covers fully as long as the wings, in the male ; slightly longer 

 than the wings, in the female. The only difference between this 

 species and C. ensiger in coloration is the usual lacking of the 

 spots on the wing covers in the latter, and in the same the pres- 

 ence of a broad black band on either side of the tubercle of the 

 vertex, which exists in the former but seldom, and then it is very 

 narrow. 



" Male, length of wings, 1 .7 inch ; breadth in middle, .32 inch ; 

 of hind femora, .9 inch. Female, length of wing covers, 1.9 

 inch; extent of wing covers beyond wings, .1 inch; breadth of 

 wing covers in middle, .22 inch; length of hind femora, 1 inch; 

 of ovipositor, 1 inch." — Scudder. 



Genus Xiphidium. Serville (1831). 



Face, rounded, somewhat oblique; a blunt projection between 

 the an^^ennae, somewhat excavated on the sides, for the reception of 

 the protuberance on the inner side of the first joint of the anten- 

 nte. Fyes, hemispherical ; pronotum truncate in front, rounded 

 behind, lateral edges rounded, slightly excavated on the side, be- 

 hind. Prosternum, with two spines ; front coxre, with a spine on 

 the outside. Anterior tibiiE armed beneath with a row of six 

 spines on each side. 



This genus includes those small and medium-sized green grass- 

 hoi)pers, with long, tapering antenn;e, which are so common dur- 

 ing the summer in grass fields. 



The species may be separated by the following table : — 



