338 NEW TROPICAL AMERICAN ORTHOPTERA 



broadly obtuse-angulate, instead of the whole plate acute tri- 

 gonal, in the male cerci being simple, slender distad and incurved, 

 instead of compressed distad and directed caudad with the form 

 sigmoid when seen from above, and in the slightly more produced 

 male subgenital plate. Giglio-Tos' D. distinguendus, described 

 from San Pedro Province, Paraguay,^ may be closely related to 

 this species, not having been recognized by us in the material 

 we have studied, but from the diagnosis it apparently differs 

 from forcipatus in having the frontal costa entirely obtuse sul- 

 cate, in its greater size, its proportionately shorter tegmina, its 

 brown-greenish caudal tibiae and other details of the coloration. 

 Type. — cf ; Misiones, Argentina. December 14, 1910. (P. 

 Jorgensen.) [Acad. Nat. Sci. Phila., Type no. 5292.] 



Size medium: form relatively slender: surface dull. 



Oeciput strongly arcuate when seen from the side, rather strongly declivent 

 to the fastigium, which has the same angle; interocular width faintly less than 

 interantennal width of frontal costa: fastigium with greatest width of its disk 

 faintly greater than the interocular width of the vertex, very shallowly exca- 

 vate, margins distinct but not high; fastigio-facial angle broadly rounded 

 when seen from the side, appreciably produced, extending cephalad of the eye 

 a distance equal to one-half the width of the latter: facial line distinctly re- 

 treating: frontal costa narrowing to the fastigio-facial junction, expanding 

 moderately between the antennal bases, slightly narrowed ventrad of the 

 median ocellus, gently diverging ventrad of this, subobsolete at the clypeal 

 suture, dorsal section of costa punctato-excavate, about and ventrad of the 

 median ocellus for about two-thirds of the distance between the ocellus and the 

 clypeal suture moderately and broadly sulcate, ventral section non-sulcate: 

 supplementary facial carinae distinct, sinuate, but slightly diverging ventrad: 

 eyes moderately prominent when seen from the dorsum, in basal outline sub- 

 ovate, distincth^ flattened cephalad, their greatest depth nearly twice as great 

 as the length of the infra-ocular sulcus: antennae twice as long as the dorsum 

 of the pronotum, subdepressed. 



Pronotum with the greatest dorsal length two-fifths' of the length of the 

 caudal femora, in form but very faintly sellate when seen from the side : disk 

 of pronotum with greatest (caudal) width of disk contained slightly more than 

 one and two-fifths in the greatest length of the same : cephalic margin of disk 

 subtruncate with a very faint median emargination; caudal margin of disk 

 obtuse sub-rectangulate, with apex of angle narrowly rounded and margins 

 decidedly cingulate : median carina obsolete on the prozona and cephalic third 

 of metazona, distinct but low on the caudal two-thirds of the metazona; pro- 

 zona and metazona subequal in length; transverse sulci distinct, narrow: 

 lateral lobes of the pronotum with the greatest dorsal length one-third greater 



sBoUett. Mus. Zool. Anat. Comp. Torino, ix, no. 184, p. 22, (1894). 



