274 PROCEEDINGS OF THE ACADEMY OF [Apr., 



arcuato-emarginate laterad, distinctly but shallowly V-emarginate 

 mesad; cerci damaged; subgenital plate transverse, emarginato- 

 truncate mesad, provided laterad with articulate styles of moderate 

 length. Cephalic femora with the ventro-cephalic margin having 

 four median and three distal spines, between which groups the margin 

 is provided with a number of spinulations. Median and caudal femora 

 well spined ventrad; caudal metatarsi subequal to the remainder of 

 the tarsal joints in length. All of the tarsi with distinct arolia 

 between the claws. 



General color of head, disk of pronotum, of greater portion of 

 tegmina when in repose position over the thoracic segments, coxse and 

 of limbs raw sienna, the lateral portions of pronotum and marginal 

 field of tegmina subhyaline. Dorsum of abdomen largely blackish 

 mesad, the lateral portions of the segments increasingly of the 

 general color distad; ventral surface of the abdomen mesad of the 

 general color, broadly bordered laterad with blackish, very narrowly 

 edged with the pale color, subgenital plate quite solidly and contrast- 

 ingly blackish. Head with the eyes blackish brown; face marked 

 with bone brown as follows : a clouded bar between the eyes, ventrad 

 of this between the ocelli traces of another weaker one, between 

 the antennae arcuate line of six spots with another spot ventrad of 

 each antennal scrobe and on each side a single similar one ventrad 

 of this line; palpi tipped with bone brown; antennse of the general 

 color becoming darker distad. Pronotal disk with six pairs of 

 points and a pair of small clouds of bone brown. Limbs marked with 

 bone brown at the insertion of the spines and at the distal extremity 

 of most of the tarsal joints. 



Measurements. 



Length of body 12.2 mm. 



Length of pronotum 3.5 " 



Greatest width of pronotum : 5.3 " 



Length of tegmen 5.8 



Greatest width of tegmen 3.5 



li 



-o' 



The type of this species is unique. 



Subfamily NYCTIBORIN.^. 

 * Nyctibora glabra Giglio-Tos. 



Alto Pencosa, Prov. of San Luis. Elev. 660 meters. December 

 22, 1908. (Jorgensen.) One male. 



This species was described from Caiza and San Francisco, Bolivian 

 Chaco,® and is here recorded from Argentina for the first time. The 



6 BoU. Mus. Zool. Anat. Comp. Torino, XII, No. 302, p. 9 (1897). 



