40 



II.— Siib-fam. TETTIGINiE. 

 Group 8. — Tettlgini. 



By this arrangement the second and third divisions are considered as 

 parallel, the former connecting with the first division by the form of the head, 

 while the latter also connects with the first division by the form of the 

 antennae. As a matter of course, these characters are not the only affinities. 

 By this plan the transition from Tryxcdis, through Opomala, Pt^rsomorpha, 

 Oxycoryphus, Stenobothrus, &c., to the typical CEdipodce, is natural and 

 gradual ; whether the same thing is true in regard to the other branch, I am 

 unable to say. 



As it is necessary in a synopsis or catiilogue to form one continuous 

 series, I shall place the groups in the order that they are numbered. 



As will be seen, I use the termination idee to designate the families ; irne 

 to designate the sub-families ; and iiii for the next lower division ; this appear- 

 ing to conform to modern usage in other departments of zoology. By adopt- 

 ing this method, the comparative importance of the group is at once known 

 by the termination of its name. 



The relations of the sub-families and groups to each other may be seen 

 by the following somewhat artificial synoptical table : 



I. Anterior margin of the prosteruum truncate, not elevated; claws 



of the tarsi furnisbed with pulvilli ; prouotum shorter than 



the abdomen Sub-fam. 1. — AcridirKe. 



A. Antennae C-8-joiuted ; not longer than the head Group 1. — Proscopini. 



A A. Antenna; multi-articulate ; longer than the head: 



a. Head produced in front in the form of a cone or pyramid ; 



face very oblique ; antennaj ensiform, triquetrous : 



b. Elytra narrow Group 2. — Tnjxalini. 



lb. Elytra very broad Group 3. — Trigonopterygini. 



aa. Face sub-oblique or vertical : 



b. Antennas filiform, sub-depressed or clavate; joints in- 



distinct : 



c. Prosternum unarmed Group 4. — (Ediiwdim. 



ce. Prosternum spined Group 5.—Acridiiii. 



bb. Antenna; acuminate ; joints distinct ; front more or less 



advanced between the antenna^ in the form of a blunt 



cone : 



c. Joints of the a^ntennae flat _ Group G. — Xiphocerim. 



cc. Joints of the antenme terrete Group 7. — Plujmatini. 



II. Anterior margin of the prosternum elevated; claws of the tarsi 



without pulvilli ; prouotum extending to tip of the abdo- 

 men Sub-fam. 2.—Tcttkfmw. 



A. Prosternum unarmed Group 8. — Tettlgini, 



