56 



Divis. l.-CONOCEPHALIDES. 



The head produced in front in the form of a cone or pyramid; face quite 

 oblique, generally straight; antennae enlarged near the base, and acuminate 

 toward the apex; joints flattened or triquetrous, and distinct; the body gener- 

 ally slender; and the posterior femora but moderately or slightly enlarged 

 near the base. 



This division may be subdivided into two sections, distinguished from 

 each other by the length of the antennae and number of joints contained:* 



A. Aiitenuaj shorter than the bead ; Microcerides. 



AA. Autennaj longer tbau the head Macrocerides. 



Sec. 1.— microcerides 



Head elongatcTConical; face very oblique, nearly horizontal; antennae 

 conic, shorter than the head, consisting of not more than six or eight joints; 

 contains but one group, Proscop'ini. 



Group l.-PROSCOPINI. 



Proscopldes, Serv.; Proscopidce, Scudd. 



There are no representatives of this group found in the United States; 

 and up to this time none have been discovered in North America. 



Sec. 2.— macrocerides. 



Antennte longer than the head, niultiarticulate. This section contains 

 two groups, Tri/xala/i and 2\lgonopter>jgini: 



A. Elytra narrow Tnj.mlini. 



AA. Elytra broad Trigonoptcrygini. 



Group 2.-TRYXAL1NI. 



Gryllus acrida, Linn.; Truxalides, Serv.; TruxalidcB, Scudd ; Tnjxalidce, 



Walk. 



The head produced in front in the form of a cone or pyramid; tlie face 

 quite oblique but not horizontal; the anteunse enlarged near the base, their 



* The entire subfamily misht be separated into two divisions by these characters, 

 as all except the single group I'foscDpiui have the anteinue longer than the head. 



