278 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



Cephalic coxae proximad and proximal half of median and caudal 

 coxae blackish chestnut brown, remaining portions of limbs buffy 

 with spines tawny. Ventral surface of abdomen chestnut brown, 

 shading to ochraceous-tawny meso-proximad. 



It is to be noted that the coloration of /. panamae Hebard, I. 

 tolteca Saussure and I. nana Saussure and Zehntner, shows close 

 agreement to that of this species. 



Length of body 11.2, length of pronotum 2.7, width of pronotum 

 3.4, length of tegmen 11.1, width of tegmen 3.3, length of cercus 2.2, 

 length of caudal femur 3.8, length of caudal metatarsus 1.9, length 

 of succeeding caudal tarsal joints 1.8 mm. 



In addition to the type, two paratypic males are before us from 

 La Palisa del Bracho, Laguna Mamaita, Santiago del Estero, 

 Argentina. 



Pseudomops neglecta Shelford. 



1906. P[seudomops] neglecta Shelford, Trans, Ent. Soc. London, 1906, p. 256. 

 [ 9 ; Rio Grande do Sul, Brazil.) 



Villa Lutecia, near San Ignacio, Misiones, Argentina, 1 cf . 



Gran Chaco, Argentina, 1 cf. 



Icano, Rio Salado, Santiago del Estero, Argentina, 1 cf , 2 9 . 



Averias, Rio Salado, Santiago del Estero, Argentina, 1 9 . 



Las Garzas, Rio Las Garzas, Santa Fe, Argentina, 1 cf , 3 9 . 



NYCTIBORINAE. 

 Pseudischnoptera rhabdota^**^ new species. Plate XI, figui-es 15, 16 and 17. 



This handsome insect is structurally very similar to P. lineata 

 (Olivier) ; differing only in the narrower interocular space, the very 

 broadly and weakly convex pronotal disk, which is flat in that spec- 

 ies, and specialization of the meso-distal portion of the male supra- 

 anal plate. The coloration and color-pattern of tegmina and wings 

 is very distinctive in this insect, however, and very different from 

 the striking type shown by lineata. 



Type: cf ; Border of Rio Salado, near Icano, Santiago del Estero, 

 Argentina. [Paris Museum.] 



Size small, form relatively slender for the subfamily. Head elong- 

 ate, flattened; eyes not extending ventrad of the antennal sockets 

 laterad; inter-ocular space moderately broad, two-fifths as wide as 

 that between the antennal sockets; ocellar spots small but distinct. 

 Maxillary palpi short, third joint as long as the decidedly expanded 

 fifth joint; fourth very slightly over half as long, expanding strongly 

 distad, with dorsal surface suddenly minutely impressed at the dis- 



"' From pai3Soj'i:Y] = streaked. 



