PHEIXA.— AMBLTCOEYPHA. 335 



4. Phrixa maya, sp. n. (Tab. XVI. fig. 2, s .) 



c? . Verticis rostrum apice anterius iinpressione notatum. Occiput sparse subgranulatum. Lobi laterales 

 prouoti margine inferiore obliquo, subsinuato. Elytra subcoriacea, illis P. schumanni fere consimilia, 

 apice tamen minus oblique truncata ac minus acuta. Campus tympanalis coriaceus, reticulato-punctatus, 

 intus in medio areolis fuscis, propterea partem infuscatam obferens ; vena stridulante supra obsoletissima. 

 Cerci longissimi plus quam semicirculariter arcuati, teretes, ad tertiam partem apicalem subangulati, 

 dehinc in unguem longissimum leviter arcuatum excurrentes ; ungue estus basi faveolato. apice acuto, 

 nigro. Lamina infra-genitalis producta, subtus sulco exarata, apice angulato-incisa, stylis brevibus 

 instructa. 



S • Long. corp. 21 ; pronot. 7 ; elytr. 33 ; femor. post. 23 millim. 



Hab. Mexico, Valladolid in Yucatan (Gaumer). 



5. Phrixa sima, Brann. 



Phrixa sima, Brunn. v. W. Monogr. der Phaneropt. p. 264. 2. 



" Statura minore. Fastigium (rostrum) verticis subsulcatum, ultra marginem scrobum antennarum non 



productum. Elytra vena mediastina obliqua. $ ." 

 $ . Long. corp. 24 ; pronot. 8 ; elytr. 35, lat. 15 ; femor. post. 23 ; ovipos. 8*5-10 millim. 

 2 . Long. corp. 23 ; pronot. 5-6 ; elytr. 20, lat. 12 ; femor. post. 19 millim. 



Hab. Mexico, Vera Cruz, Orizaba. 

 Unknown to us. 



Group AMBLYCORYPHITES. 



Ambly coryphee, Brunner v. W. Monogr. der Phaneropt. p. 264. 



AMBLYCORYPHA, Stfil. 



Orophus, Saussnre, Rev. et Mag. Zool. (2) xi. p. 204 (1859) (partim). 



Ambly corypha, Stal, 1873, Ofv. Vet.-Ak. Forh. xxx. 4, p. 40 (1873) ; Recens. Orthopt. 2, p. 18; 

 Brunner v. W. Monogr. der Phaneropt. p. 265. 



In the males of this genus the tambourine of the elytra is somewhat characteristic, 

 but its structure is difficult to define. In some species there are, in the left elytron, 

 two transverse elevated parallel veins, and in addition to these veins the tympanal field 

 presents, besides the dense reticulation, a wide reticulation, formed by flexuous nervures 

 (A. oblongifolia, A. uhleri, A. rotundifolia). In other species there is only one 

 transverse (stridulating) vein {A. tepaneca, A. guatemalce). 



Synopsis specierum *. 



1. Pronoti lobi laterales margine postico rotundato. Metasternum lobis roiundatis instructum. 

 2. Pronoti canthi tota longitudine acuti. Femora postica in apicem elytrorum non 

 attingentia. ? £ . 



* Secundum Brunner v. Wattenwyl, I. c. 



