618 PROCEEDINGS OF THE NATIONAL MUSEUM. 



EUMASTAX VERSICOLOR Burr. 



Etnnastax versicolor Burr, Essai sur les Eumastacides, p. 54. 

 This is also a Paraguayan species. 



MASYNTES Karsch. 

 TABLE FOR DETERMINATION OF SPECIES. 



a. Tegmina lobit'orm, elliptical, the apex broadly rounded. Pronotum truncate 



behind, the middle minutely notched borelln Giglio-Tos 



aa. Tegmina and wingH perfectly developed. Pronotum rounded behind, the middle 

 not notched tigris Burr 



MASYNTES BORELLII Giglio-Tos. 



MasynteK fiordlii Giglio-Tos, Boll. Mu.s. Zool. Anat. Torino, XII, 1897, No. 302, 

 p. 17. 



It has been taken at San Pedro, Paragua3\ 



MASYNTES TIGRIS Burr. 



This is also recorded a.s coming from Paraguay. 



As indicated in the ta])le for determining tlie subfamilies of Para- 

 guayan locusts, it will be seen that the insects ])elonging to this sub- 

 family are rather long, wingless, and resemble to a certain extent the 

 different species of walking sticks, or stick insects. Thus far there 

 have been reported as coming from this region but four species. A 

 numy)er of others should be added. The}^ belong to the two genera 

 that may be separated b\' the accompanying table. 



TABLE FOR DETERMINATION OF GENERA. 



a. Pronotum cylindrical, not separated from the prosternum l)y longitudinal lines. 

 Body comjjaratively heavy in the female; antenn;e nearly as long or a trifle 



longer than the vertex TeUinorhi/nchm Brunner 



aa. Pronotum more or less flattened from above, divided from the prosternum by a 

 longitudinal line. Body long and slender even in the fewiale; the vertex in 

 both sexes advanced beyond the tip of the antenna> Ccphalornnia Serville 



TETANORHYNCHUS Brunner. 

 TABLE FOR DETERMINATION OF SPECIES. 



((. Rostrum of the female distinctly shorter tluiu the remainder of head, attenuated 



toward the a^jex huiitills Giglio-Tos 



aa. Rostrum of the female distinctly longer than the remainder of head. 



, b. Rostrum with the apex strongly clavate, posterior tibia- armed above with 



14-22 spines on the inner and outer rows hurcllii Giglio-Tos 



bb. Rostrum attenuate toward the apex. Posterior tibite armed above with 13 

 spines on the inner and outer rows aiujuslirodris Bruimer 



