202 OETHOPTERA. 



[4. Calamacris palmeri, sp. n. 



Very similar to G. rnexicana in general structure and size, but differing from that insect, as indicated by the 

 synoptic table of the species, in the less heavy antennae and the more acuminate fastigium of the vertex. 

 Length of body, $ , 84 ; of antennae 8*5, of pronotum 5, of hind femora 11 millim. 



Hob. Lower California, Cape St. Lucas (Dr. Palmer, in coll. S. H. Scudder).~\ 



5. Calamacris oculata, sp. n. 



The single specimen at hand has been preserved in spirits and has lost its colour. The lower edges of the 

 pronotum, however, show traces of a pale line, the inner side of the middle femora and the basal half of 

 the tibiae are black, while the hind tibiae have the lower side and apical third strongly infuscated. The 

 inner side of the knees is also darkened. 



The distinctive characters are noted in the synoptic table of the species. 



Length of body, & , 22 ; of antennae 9-5, of pronotum 3, of hind femora 9 millim. 



Hab. North America, extreme Southern Arizona (coll. Calif. Acad. Set.). 

 It certainly occurs across the border-line in Mexico as well. 



PYRGOMORPHA, Serville. 



Truxalis, Charpentier, Horse Ent. p. 126 (1825) ; Burmeister, Handb. Ent. ii. p. 206 (1838). 

 Truxalis {Pyrgomorpha), Serville, Hist. Orthopt. p. 583 (1839). 



Pyrgomorpha, Brunner, Prodr. Eur. Orthopt. p. 185 (1882) ; Bolivar, Monogr. Pirgomorfinos, 

 p. 76 (1884). 



l. Pyrgomorpha dispar, Boliv. 



Pyrgomorpha dispar, Boliv. Monogr. Pirgomorfinos, p. 79 (1884) \ 



Hah. Mexico (coll. Brunner v. Wattenwyl 1 ). 



This insect is not represented in any of the collections studied, and is the only 

 species of the genus thus far reported from American territory. 



ICHTHYDION, Saussure. 



Ichthydion, Saussure, Eev. et Mag. Zool. (2) xi. p. 390 (1859) ; Bolivar, Monogr. Pirgomorfinos, 

 p. 94, t. 2. fig. 13 (1884). 



1. Ichthydion mexicanum, Sauss. (Tab. IV. figg. 22, 22 a, $ .) 



Ichthydion mexicanum, Sauss. Rev. et Mag. Zool. (2) xi. p. 390 l ; Thorn. Acrid. N. Amer. p. 198 

 (1873) 2 ; Boliv. Monogr. Pirgomorfinos, p. 94, t. 2. figg. 13, 13 a (1884) \ 



Bab. Mexico 1 i Vera Cruz (coll. L. Bruner 3 ). 



XYRONOTUS, Saussure. 

 Xyronotus, Saussure, iu litt. ; Bolivar, Monogr. Pirgomorfinos, p. 96, t. 2. fig. 12 (1884). 



This genus is confined to Mexican territory, and thus far is known only by a single 



