2 ORTHOPTERA. 



Charles C. Deam, Bluffton, Indiana ; Professor W. S. Blatchley, Indianapolis, Indiana ; 

 O. W. Barrett, Tacubaya, Mexico, are most important. The writer is especially 

 indebted to Dr. H. de Saussure, who was kind enough to send the types of a number 

 of the species described by him during his active days in connection with the natural 

 history of Mexico, by means of which it has been possible to clear up many points 

 regarding the synonymy of several genera and species. He has also to thank Satnuel 

 H. Scudder for his advice and co-operation during the preparation of this work. 



The Acridiidee are represented in Central America by seven of the nine subfamilies 

 or tribes recognized by Brunner v. Wattenwyl in his ' Eevision du Systeme des 

 Orthopteres.' They may be separated by the following table : — 



Table for determining the Subfamilies of Acridiidce. 



A 1 . Claws without cushion or arolium between them ; pronotum extending 



over the abdomen ; tegmina lobiform Tettigin^e. 



A 2 . Claws with cushion or arolium present. 



b 1 . Antennae shorter than the front femora Mastacin/E. 



b 2 . Antennas longer than the front femora. 



c l . Prosternum smooth, not provided with a tubercle, swelling, or spine. 

 d 1 . Fastigium of the vertex but little declivous, meeting the face in a 

 more or less well-defined angle ; the face usually very oblique. 



Wings as a rule without dusky band Tryxalin^e *. 



ef. Fastigium of the vertex rounded at its point of junction with the 

 face; the latter vertical or nearly so. Wings usually with 



coloured disk aud well-defined dusky band CEdipodin^e *. 



c 2 . Prosternum in front laminately elevated, tuberculate or spined. 



d 1 . Foveolse of the vertex above, contiguous, forming the apex of the 



fastigium. Front strongly receding Pyrgomorphin^e. 



d 2 . Foveolae of the vertex above (but never forming the apex of the 

 vertex) or lateral, or below, or wanting. 

 e\ Foveolse above, open behind. Prosternum swollen, rarely spined. Pamphagin^e. 

 e 2 . Foveolse lateral or inferior, closed behind or (often) entirely 



wanting. Prosternum distinctly spined or tuberculate . . Acridiin^:. 



* These two subfamilies are occasionally difficult to distinguish, therefore there is given here, in an English 

 form, the detailed distinctions laid down by Stal (Recensio Orthopt. i. pp. 6-7) : 



Fastigium of vertex not or slightly, rarely strongly, declivous ; front trending more or less, 

 generally strongly and obliquely, backward ; eyes generally longer than the infra-ocular 

 portion of the genae, rarely shorter or of equal length, and in these cases the front is very 

 oblique ; antennae sometimes ensiform, inserted between or below the middle (" inter medium 

 vel pone medium ") of the eyes. Metazona rarely longer, generaUy shorter than the prozona, 



