37 



The following are the larger sections of Fischer's synoptical arrangement 

 of the European Acridii in his " Orthoptera Europasa :" 



I. Anterior margin of the prosternum truncate, not elevated : 



A. Antenna; triquetrous near the base, acute toward the apex, 



rarely filiform; elytra and wings present. (This includes 

 Tryxalis, Pyrgomorpha and Opomala.) 



B. Anteunse depressed or sub-filiform (rarely clavate or sub-clavate 



at the apex) : 



a. Prosternum unarmed. (This includes Ghrysochraon, Oxycory- 



phits, Paracinema, Stenobothrus, Epaeromia, Stauronotiis, 

 (Edipoda, SpJiinctonohts, PacJiytylus, Thrincus.) 



b. Prosternum with an equally elevated protuberance, not 



standing out free. (Includes Stetheopliymn, Pampleurus.) 



c. Prosternum distinctly spined. (Includes Portlietis, CucuIU- 



gera, Acridhim, Caloptenus, Pezotettix, and Platyphyma.) 



II. Anterior margin of the prosternum elevated; the mouth inclosed 



by ample folds as with a muffler; meso- and meta-sternum 

 transverse, arcuate : 

 A. Each sex winged ; pulvilli wanting •- Tettix. 



Mr. Scudder indicates the following arrangement of the subdivisions in 

 the tables at the end of his " Catalogue of the Orthoptera of North America:" 



I , ProscopidiE. 



II ■ Truxalidae. 



ni» Conophori | Xiphocerid^- 



IV ( ( Pceciloceridse. 



V Mucronati. 



VI Mutici. 



VII -Tetricides. 



All of these sub-families, except the first, are represented in the North 

 American fauna, and all, except the first and fourth, in the United States. 



Walker's arrangement of the Acrididas in his " Catalogue of the Der- 

 maptera Saltatoria," is not complete ; but as it is the most extensive that has 

 been published, I insert it, so far as it refers to the larger subdivisions which 



he terms " limited families :" 



A. Claws of the tarsi furnished with pulvilli Spongiphori. 



a. Antennaj C-8jointe*l Fam. 1.— Proscopidse. 



flfl. Antenme multi articulate : 



b. Head produced ; face very oblique : 



c. Elytra narrow Earn. L'.— Tryxalidse. 



cc. Elytra broad - Fam. 3.— Trigouopterygidse. 



bb. Face sub-oblique or erect : 

 e. Autenn;e acuminate: 



d. Joints of the anteunie fiat: 



e. Antenna' ensiform; females winged. Pam. 4. — Xiphoceridaj. 

 cc. Antenna- moniliform near the apex. Fam. 5. — Pamphagidae. 

 dd. Joints of the antennae terete Fam. 0.— Phymatidae. 



