28 



prominent carinae testaceous; upper portion of abdomen 

 testaceous with dusky markings; abdomen on the sides 

 dusky, venter yellow. 



Length : of body, female 22 mm ; of pronotum 4 mm ; of 

 tegmina 17 mm: of hind femora 13.5 mm: of natennae 

 7 mm. 



This insect also occurs upon low alkali grounds in the 

 vicinity of Carcarana F. C. C. A. like the preceding. It is 

 much rarer than graminea. (Anton Kurriger. ) 



GENUS ORPHULELLA, GIGLIO-TOS. 



The insects belonging to this genus are all rather small 

 and very variable in color — so much so, that without a very 

 full series of specimens to study the student cannot construct 

 a table that will definitely separate them. There seem to 

 be at least three well marked forms found within the terri- 

 tory covered by the present paper. They may be deter- 

 mined by the following 



TABLE FOR SEPARATING THE SPECIES. 



A. General color griseous. Tegmiua sprinkled with black dots. 



b. Size larger. Lateral carinie of pronotum entire, strongly diverging 

 posteriorly. punctata De Geer. 



]>b. Size smaller. Lateral carina' of pronotum somewhat interrupted 

 near middle, less stronglj'^ diverging posteriorly. 



intricata Stal. 

 AA. General color green. Discal field of tegmina varied with black. 



eleg-aiis Giglio-Tos. 



0. punctata BeGeer. Resistencia, Chaco. (Giglio-Tos.) 

 0. intricata Stal. Buenos Aires (Giglio--Tos) : Cordoba 



(Schulz) and other localities. 



O. elegans Giglio-Tos. Resistencia, Chaco (Giglio-Tos): 



Cordoba (Schulz); Tucuman (Bruner. ) 



GENUS DICHROMORPHA, MORSE. 



I), anstralis n. sp. 



The collections of Masters Oliver and William Thomas at 

 Carcarana contain several specimens of an insect that with- 

 out doubt can be referred to the genus Dichroniorpha. These 

 specimens certainly are not specifically identical with the 



