74 



the female about half again as broad; frontal costa of equal 

 width throughout, sulcate in male from fastigium to clypeus, 

 in female from ocellus downward. Pronotum, (male) with 

 the sides nearly parallel, (female) somewhat expanding 

 posteriorly, with a rather well defined broad brown band 

 running from back edge of eyes along upper lateral edges of 

 pronotum to base of tegmina, below this the sides are 

 yellowish white. The transv^erse sulci quite plain, the pos- 

 terior one a little back of middle; hind edge angulate. 

 Tegmina and wings not quite reaching tip of abdomen in both 

 sexes. General color of former light gray with inf uscation at 

 base. Tegmina rather narrow toward the apex. Poterior 

 femora with indication of two oblique dusky bands on outer 

 face and upper edge, inner side, and also lower sulcus more 

 or less tinged with bright orange red ; knees inside and out 

 dusky, with the lower edges blue ; posterior tibiae with ex- 

 ception of a rather broad pale annulus near base blue ; base 

 of wings yellowish, the apex dusky, the upper face black or 

 dark brown. 



Length : of body, d 17 mm, ? 26 mm ; of pronotum, d^ 3.5 

 mm, 9 5.75 mm; of tegmina, cf 10.5 mm, ? 16 mm; of hind 

 femora, (^ 10 mm, 9 14 mm. 



This insect occurs on the slopes west of the city of Mendoza, 

 where it was found in small numbers upon a leafless, rather 

 tall composite growing in the dry sandy bed of a creek. 



DichropluH pratejisis n. si3. 



General color flavo-tetaceous varied with brown and black ; 

 pronotum with light bands at edges of disk ; hind tibiae 

 bluish-gray ; lower sulcus and inner face of posterior femora 

 varying from yellow to dull orange. Interval between 

 mesosternal lobes a little longer than wide. Tegmina a trifle 

 surpassing tip of hind femora. Pronotum with sides gently 

 diverging posteriorly ; the median carina of equal prominence 

 throughout, cut near the middle by last transverse sulcus. 

 The sides of head, back of eyes and pronotum to the last 

 transverse incision dusky, in some specimens back of this con- 



