EHACHICEEAGEA.— POLYSARCTJS. 341 



taken, while the males were more active and jumped about so as to attract one's 

 attention to them. Accordingly, a good series of the latter was collected. 



MICROTYLOPTERYX, Rehn. 

 Microtylopteryx, Rehn, Proc. Acad. Nat. Sci. Philad. 1905, p. 448. 



The present genus is a somewhat aberrant one among the Acridiinee, since it has 

 some of the characteristics of the Pyrgomorphid-genus Aspidophyma. In fact one 

 species (M. fusiformis) has been figured on Tab. IV. as A. americana. The species 

 are found in Costa Rica and Nicaragua, where they are at home among the fallen 

 leaves in and about the forests. Two forms have thus far been described. 



1. Microtylopteryx hebardi, Rehn. 



Microtylopteryx hebardi, Rehn, Proc. Acad. Nat. Sci. Philad. 1905, pp. 448-451, figg. 40, 42 x . 

 Ilab. Costa Rica 1 , Carrillo. 



2. Microtylopteryx fusiformis, Rehn. (Aspidophyma americana, Tab. IV. 



figg. 27, 27 a, <?.) 



Microtylopteryx fusiformis, Rehn, Proc. Acad. Nat. Sci. Philad. 1905, pp. 451-454, figg. 41, 43 \ 



Ilab. Nicaragua (coll. L. Bruner) ; Costa Rica, Carrillo 1 S Juan Vinas (L. Bruner). 



This species may be regarded as the type of the genus, since it seems to be more 

 common and at the same time enjoys a wider distribution than the preceding. 



[POLYSARCUS, Saussure. 



Polysarcus, Sauss. Rev. et Mag. Zool. 1859, p. 392; Stal, Syst. Acrid, i. p. 34 (1878) ; Brunner, 



Rev. Syst. Ortbopt. p. 148 (1893); Gigl.-Tos, Boll. Mus. Zool. Comp. Torino, no. 311, p. 50 



(1898). 



This Brazilian genus is included on account of its peculiar type of thoracic structure 



and because of its relationship with Bhachicreagra and Microtylopteryx. Only a 



single species is known. 



1. PolysarCUS ataVUS, Sauss. 

 Polysarcus atavus, Sauss. Rer. et Mag. Zool. 1859, p. 392 \ 



Edb. Beazil \ Bahia.] 



eiol. CENTR.-AMEE., Orthopt., Vol. II., November 1908. 2 Yr 



