PHEYNOTETTIX.— PYRGOMOEPHIN^. 199 



5. Phrynotettix robustllS, Bruner. {Haldemanella robusta, Tab. II. figg. 2, <s ; 

 3, $ .) 



Haldemanella robusta, Bruner, Proc. U.S. Nat. Mus. xii. p. 81 (1890) \ 

 Haldemannia robusta, Towns. Ins. Life, vi. p. 31 (1893) 2 . 



Haldemanella tschivavensis, Scudd. Cat. Orthopt. U.S. p. 44 (1900) (in part.) 3 . 

 Phrynotettix tshivavensis, Rehn, Proc. Acad. Nat. Sci. Philad. 1902, pp. 596, 597 (in part.) 4 . 



Hab. "North America, El Paso, Texas, Las Cruces, New Mexico, and S.W. Arizona 

 (coll. L. Bruner). — Mexico, Villa Lerdo, Durango (Hoge : 2 nymphs). 



This is the largest representative of the genus, and is very distinct from all the 

 others in wing-structure, as is indicated by the table for the separation of the various 

 species. 



Subfam. PTBGOMORPHIN^E*. 



The subfamily Pyrgomorphinse is represented in Central America, Mexico, and the 

 adjacent portions of the United States by no less than six well-marked genera and about 

 twenty species. Most of the forms belong to Calamacris, Rehn, and Sphenarium, Charp. 

 The members of the former genus are restricted to the more arid regions of Middle and 

 Northern Mexico and Arizona, while those of the latter are distributed throughout 

 the humid portions of Mexico southward. The genera may be recognized by aid of 

 the annexed Table f : — 



Synopsis of the Genera. 



A. Apical spine on the outer side of the hind tibiae wanting. 

 Posterior lobe of the pronotum not decidedly shorter than the 

 anterior one. Tegmina and wings well developed, in the male 



equal to, in the female shorter than, the abdomen Pyrgomorpha, Serville. 



AA. Apical spine on the outer side of the hind tibiae strongly con- 

 spicuous. Posteridr lobe of the pronotum decidedly shorter 

 than the anterior one. Tegmina and wings wanting or the 

 former only present and rudimentary. 

 b. Body elongate, slender, subcylindrical. Tegmina wanting or 

 very rudimentary. 

 c. Antennae filiform, cylindrical, inserted between the eyes. 



General colour green or greenish Ichthydion, Saussure. 



cc. Antennae ensiform or subensiform, the joints depressed, 

 inserted at the upper extremity of, or slightly beyond, 



* Principal works referred to for this subfamily are: — 



Bolivar, Ignacio, Monografia de los Pirgomorfinos (Madrid, 1884). 



Bolivar, Ignacio, " Notas sobre los Pirgomorfidos " (Bol. Soc. Esp. Hist. Nat. 1904, pp. 306-326). 

 Karsch, P., " Beitrage zu Ignacio Bolivar's Monografio de los Pirgomorfinos " (Ent. Nachr. xiv. 1888). 

 t The insect figured on Tab. IV. figg. 27, 27 a, as Aspidophyma americana has since been described and 

 figured by Eehn as Microtyhpteryx fusiformis (see Proc. Acad. Nat. Sci. Philad. 1905, pp. 451-454, fig. 43) 

 and assigned a place among the genera of the subfamily Acridiinae. See infra. 



