October 1S94. 



psrcHE. 



149 



distinguished as follows: in the Tetti- of 16-22 joints, in our forms of 21-22. 



giae the anterior femora are carinate The number of joints frequently varies 



above, and the antennae are composed in the same species, sometimes being 



of 12-14 joints, while in the Batrachi- 13 in one specimen and 14 in another, or 



(leae the anterior femora are sulcate the same individual may have 13 in one 



above and the antennae are composed antenna and 14 in the other. 



Key. 



1. Prcjnotum normal, not covering abdomen ; pulvilli present between the tarsal 



claws. Common locusts or ''grasshoppers." 



i'. Pronotum covering all or nearly all of the abdomen; pulvilli wanting 



between the tarsal claws. "Grouse-locusts" or Tettigixae. 



2. Antennae i 2-14 jointed. 



3. Median carina high, crest-like, arched longitudinally. Superior lateral 

 sinus of pronotum shallow, about one-half as deep as the inferior. 



(Gen. i,Nomotettix.) 



4. Wings abortive, not equalling pronotum. Sp. i, N. cristatiis. 

 4'. Wings perfect, equalling or passing pronotum. Sp. I, var. carinatus. 



3^ Median carina low, dorsum rather flat. Superior lateral sinus nearlv as 

 deep as the inferior. 



5. Vertex of head projecting beyond eves. (Gen. 2, Tettix.) 

 6. Vertex rounded on front margin, and the median carina distinctly 



projecting. Profile rather deeply excavate opposite eves. 



SjD. 2, 7'. ornatiis. 

 7. Wings large. Pronotum subulate behind. 



.Sp. 2, type form, orttatus. 



7I. Wings small, passing the hind thighs but little. Pronotum not sulj- 



idate ; sides of process nearly straight. Sp. 2, (ovm triaiignlnr/s. 



6'. V^ertex angulate on front margin. Profile shallowh' excavate 



opposite eyes. Sp. 3, T. grauula/us. 



5^ Vertex of head not orojecting beyond eves. (Gen. 3, Paratettix) 



Sp. 4. P. cucttllatns. 



2'. Antennae 21-22 jointed. (Gen. 4, Tettigidea.) 



S. Wings perfect, when closed passing the hind thighs. .Sp Si T. lateralis. 



S'. Wings abortive, not passing the hind thighs. Sp. 6. T. folyfiiorpha. 



I. Tettigiae. 



known as Batrachidea cristata Harr. 

 Bolivar has shown that this is more 

 The first species of this section to nearlv allied to the Tettigiae than to 

 claim attention is that most widelv the genus Batrachidea or the section 



