1913.] NATURAL SCIENCES OF PHILADELPHIA. 3^7 



to the caudal margins of the disk. The antennae may or may not 

 be broadly annulate with buffy. In every case the caudal femora 

 have a median buffy white patch. 



In size there is-considerable individual variation. 



The species has been recorded from localities extending from 

 Buenos Aires and Montevideo south to Patagonia and west to 

 Santiago, Chile. 



StilpnocMora incisa Brunner. 



1878. St[ilpnochlora] incisa Brunner, ]\Ionogr. der Phaneropt., p. 361. 

 [Peru.] 



Jujuy, Prov. of Jujuy. April, 1911. One female. 

 This interesting species is known only from Peru, San Lorenzo 

 (Giglio-Tos), and Jujuy, Prov. of Jujuy, Argentina. 



*Posidippus dentiferus (Walker). 



1869. Steirodon dentiferum Walker, Catal. Derm. Salt. Brit. Mus., II, 

 p. 391. [Locality unknown.] 



Misiones. December 20, 1910. One female. 



We have followed Kirby^^ i^ using this name for the present species. 

 Information with our specimen is to the effect that the species is very 

 uncommon. 



The localities from which the form is known are Peru, Surinam, 

 Brazil, and the Misiones, 



Anaulacomera argentina n. sp. 



Type: cf ; Misiones, Argentina. January 1, 1910. (P. Jor- 

 gensen.) [Acad. Nat. Sci. Phila., type No. 5,225.] 



Closely allied to A. laticauda Brunner from Mexico and Central 

 America, but differing in the angularly emarginate subgenital plate 

 of the male, the longer and less arcuate cerci of the same sex, the 

 slenderer ovipositor of the female, the less compressed pronotum of 

 both sexes, and the broader tympanum of the male. 



Size medium; form moderately compressed. Head with the 

 occiput slightly declivent to the fastigium; fastigium broad at the 

 base, strongly constricted mesad, distad moderately bulbous, deeply 

 sulcate on the base and the constricted median portion, the sulcus 

 represented for some distance on the adjacent portion of the occiput 

 by a shallower sulcus, lateral margins of the fastigium elevated mesad 

 and proximad, strongly diverging proximad; fastigium of the front 

 very broad, touching that of the vertex, their contiguous margins 

 subtruncate, the cephalic portions of both subdeplanate; eyes 



^ Syn. Catal. Orth., U, p. 458. 



