38 



with a medium dark spot: the posterior lobe deeply and 

 coarsely pitted; the anterior lobes smooth; mesa and 

 metapleura coarsely pitted with the sides gently compressed. 

 There is also a dark streak extending from lower edge of 

 eyes to outer marign of clypeus ; the latter and outer edges 

 of mandibles carneous. Tegmina provided with a subcostal 

 green stripe, the discal area more or less strongly mottled 

 with alternate white or green and black markings basally 

 but becoming general on the apical half of wing. Tegmina 

 and wings extending beyond the tip of hind femora ; the lat- 

 ter comparatively heavy at the base, reaching slightly be- 

 yond the tip of abdomen in both sexes ; hind tibiae with from 

 9 to 11 spines in outer row^. 



Length : of body d* 28 to 30 mm, ? 40 to 45 mm ; prono- 

 tum, d' 5 mm, ? 7. 5 mm ; tegmina, d 26 mm, + 31 to 38 

 mm; hind femora, d 18 mm, ? 22 to 27 mm. 



This insect is quite numerous in the provinces of Cordoba 

 and Sante Pe, in some localities being sufficiently plentiful 

 to cause damage to garden and some field crops grown in low 

 places where the vegetation becomes unusually rank. 



Specimens were seen in the collections of F. Schulz, H. 

 Stempelmann, O. Thomas, and both the National and La 

 Plata museums. A considerableseries of these insects was 

 also taken at Carcarana and Rosario. 



Fig. 13. — Plectrotettix plctus. male, tip of liind tibia and tDp of head and 

 pronotiim. 



GENUS EUPLETROTETTIX, N. G. 



Body of medium size, slightly compressed ; tegmina and 

 wings complete; posterior femora moderately robust at base. 



