208 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
new genus, Peruvia, and regarded it as one of the Oedipodinae. In 
this latter point 1 was mistaken. It is one of the Tryxalinae closely 
allied to Toxopterus Boh, differing from it in the feebleness (almost 
total extinction) of the lateral carinae, in the greater relative length 
of the metazona, which fully equals the prozona, and in other parti¬ 
culars. 
54. Mastax gundlachi, Proc., 17, 266; Ent. Notes, 4,20. 1876. 
Cuba. 
Karsch (Ent. Nachr., 15, 31) establishes the genus Masyntes on 
this species. 
55. Mastax nigra , Proc., 17, 266; Ent. Notes, 4, 20. 1875. 
Peru. 
A true Mastax, in accordance with Karsch’s revision of the group. 
56. Oedipoda bivenosa , Proc., 12, 339 ; Ent. Notes, 2, 24. 1869. 
Ecuador. 
This can be placed in none of the genera into which de Saussure 
has divided the Oedipodinae. It falls in the vicinity of Psinidia and 
Trimerotropis, but is remarkable for the extraordinary elevation and 
thickness of the intercalary vein of the tegmina, which is arcuate, 
curving toward the median vein and touching it at its first divarica¬ 
tion, where the latter is thickened as if to continue it; on the other 
hand, the anterior ulnar vein is quite simple though strongly arcuate 
and is connected with no other vein. It may be called Diraneura 
(Seipas, vevpa). 
57. Oinmatolampis aptera , Proc., 17, 273 ; Ent. Notes, 4, 27. 
1875. Peru. 
A true Ommatolampis, though quite apterous. 
58. Ommatolampis leucop)tera, Proc., 17, 272; Ent. Notes, 4, 26. 
1875. Peru. 
A true Ommatolampis. 
59. Ommatolampis nigroguttata , Proc., 17, 273; Ent. Notes, 4, 
27. 1875. Peru. 
This can hardly be included in Ommatolampis, though falling next 
it, between it and Daemon ax. The rugosity of the thorax, with its 
distinct and coarse median carina, indicates a distinct genus, but it can 
be placed in no other recognized genus, and may remain here until 
further study. 
60. Pezotettix dawsoni , Daws. Surv. 49th parall., 3. 1875. 
Assiniboia. 
Belongs to Melanoplus Stal, as shown by a monograph now in 
press. 
