•244 



b. Pronotum slightly pt-odiiced ujwn the head ; this margin angular : 



T. chichiiiieca, Sauss., Rev. et Mag. Zool., XIII, 400. 



A fuscous bay ; very similar in form to T. azteca, but a little larger and 

 narrower. Pronotum sub-elevated, densely punctate, but not granulose; on 

 the upper part there are sub-elevated, longitudinal ridges ; not constricted in 

 front, the humeral carinae bent forward, and continuous with the front carinse; 

 median carina perspicuous, not interrupted, scarcely acute in front; cross- 

 incisions perspicuous. Anterior and middle femora not dilated. 



Length of pronotum, 0.5 inch.. 



Mexico calida (Saussure). 



T. piii*i>ui'a§cen«!i, Serv., Ann. Sci. Nat, XXII, 291. 

 Syn., Acridium imrpurascens^ Oliv., Enc. Meth., VI, 234. 



It is a little narrower and a little longer than Acrid, subulatum (5 lines). 

 Antennae minute. Pronotum carinated, twice as long as the abdomen, and 

 terminated in a point. Wings reach to the lip of the pronotum, and are 

 tinged with purple. 



Island of Trinidad (Serville). 



BATRACHIDEA, Serv. 

 B. tolteca. 



Syn., Tettix tolteca, Sauss., Eev. et Mag. Zool., XIII, 401. 



Small, robust, dark-gray, legs annulate. Vertex- narrow, truncate, cari- 

 nate. • Pronotum terrose, granulose, sub-constricted in front; the furrows con- 

 spicuous; anterior margin truncate, reaching or slightly passing the tip of the ab- 

 domen; in the female sub-arcuate; in the male flat ; median carina sub-cristate, 

 equal throughout, but in the male somewhat arcuate between the cross fur- 

 rows ; the margins of the posterior process deflexed, narrow, broader in the 

 male than in the female, obUquely truncate at the apex. Elytra distinct ; 

 wings shorter than the pronotum. 



Length, 0.3 inch. 



Mexico calida (Saussure). 



€HORIPHYIiL,U]?I, Serv. 



Rho)]ihea, Felt.; Hymenotes, West. 

 Body entirely hid by a membraneous expansion, elevated, foliaceous and 

 very mu(;h compressed, which forms the pronotum, and extends beyontl the 



