JAMES A. G. REHN 335 



In addition to the type and allotypes we have before us seven 

 paratypes specimens (two males and five females) bearing the 

 same data as the type. These specimens show no noteworthy 

 features of difference from the descriptions of the type and allo- 

 type here given, excepting in the general tone of the coloration 

 and its main features, which variation has been adequately 

 discussed above, and in the number of spines on the margins of 

 the caudal tibiae. The latter we find varies on the external 

 margin from four to six, and on the internal margin from seven 

 to eight. 



Leiotettix mendosensis new species (PI. XVIII, figs. 12, 13 and 14.) 



A striking new species allied to L. sanguineus Bruner and 

 politus, pulchei- and hastatus Rehn, all forms from Paraguay and 

 the northern portion of Argentina. From all these species the 

 new form differs in the broad, blade-like, hooked and inwardly 

 directed distal half of the male cercus. The new mendosensis also 

 differs from hastatus in the somewhat shorter subgenital plate of 

 the male, the more slender general form, the narrower vertex and 

 fastigium, the more pronounced median carina of the pronotum 

 and the more finely angulate caudal margin of the pronotal disk, 

 as well as the more slender caudal femora; from politus in the 

 broader vertex, more impressed fastigium and narrower and 

 uniformly impresso-sulcate frontal eosta; from sanguineus in the 

 same features and also in the reddish caudal tibiae and from 

 pulcher in the more slender form, more longitudinal pronotum, 

 which has the median carina somewhat more pronounced, and in 

 the less bullate head. 



Type. — cf ; San Ignacio, Province of Mendoza, Argentina. 

 Elevation 1235 meters. March 15, 1908. (P. Jorgensen.) 

 [Acad. Nat. Sci. Phila., Type no. 5293.] 



Size niediuni : form slender, compressed. 



Head with tlie dorsal length subequal to three-fourths the dorsal length of 

 the pronotum; occiput gently arcuate when seen from the side, decurving 

 regularly cephalad to the fastigio-facial angle, interspace between the eyes 

 faintly broader than the interantennal width of the frontal costa; fastigium 

 slightly broader than the interocular space, rather shallowly but broadlj' and 

 distinctly excavate, lateral margins delicate, carinulate, the excavation of the 

 fastigium separated from the frontal costa by a transverse obtuse-angulate 

 carimilation; fastigio-facial angle rounded obtuse when seen from the side, 



TRANS. AM. EXT. SOC, XLIV. 



