42 



edge of lateral carinae with black this same color extends 

 upon the dorsal angle of tegmina. Face below the eyes 

 usually furnished with a well-defined black streak. Sides of 

 pronotum with the usual tryxaline light and dark streaks. 

 Hind tibiae varying from dull red to bright red, with a pale 

 basal annulus : knees and ajDex of femora as in the preceding 

 forms. 



Length: of body, d^ 15 mm, ? 23 mm; of pronotum, d^ 

 3.25 mm, ? 4.5 mm ; of tegmina, d' 14 mm, ? 18 to 20 mm; 

 of hind femora, d 10.5 mm, ? 13 to 14 mm. 



Very common in the vicinity of Cordoba where it may be 

 found during the winter months among the dead bunch grass 

 growing on the sandy ujjland. Prom the collection of F. 

 Schulz. 



Euplectrotettix prasinus n. sp. 



This is a somewhat larger, more robust insect than any of 

 the preceding, in which the head is somewhat broader than 

 the front edge of pronotum. The latter with the middle 

 carina considerably the strongest, the lateral ones gently 

 converging in front of the middle from w^hich point they di- 

 verge both anteriorly and posteriorly ; the hind edge some- 

 what more than a right angle; the sides and head quite 

 smooth, the punctulation being feeble. General color of 

 head and thorax dull apple green ; tegmina, base of abdomen, 

 and legs dull testaceous; the tegmina with indication of 

 discal spots. Hind femora showing traces of dusky and light 

 bands; hind tibiae red; lower sulcus of femora yellow; 

 knees black; venter yellow. 



Length (female) : of body, 30 mm, of pronotam 5.5 mm. 

 of tegmina 21 mm, of hind femora 15 mm. Cordoba in 

 January, where it is found in rank grass ; not plentiful. 



SUB-FAMILY OEDIPODINAE. 



In some parts of the Nortb American continent this sub- 

 family becomes very numerous in genera and species but it 

 seems to be represented in Argentina by less than a dozen 

 species. None of these insects are of any special importance 



