20 Annals of the Carnegie Museum. 



longitudinal pallid stripe, bordered above and below by black, which 

 gradually fades away into the general hue of the body. Face and 

 cheeks paler than the remainder of the head and the bod}- of the 

 insect, but not yellow, as in the male. Antennae and anterior and 

 middle legs pale vinaceous red. Cerci of the male somewhat spatulate 

 apicall\-, rather strongly curved inward and downward; the hind 

 margin of the eighth abdominal segment above widely and roundly 

 emarginate, the sides of the emargination provided with a short 

 coarse tooth. 



Length of body, cf , 20 mm., 9 , 29 mm.; of pronotum, 9 , 2.8 mm., 

 9, 3.1 mm.; of tegmina, cf, 14 mm., 9, 15 mm.; of hind femora, 

 cf , 15 mm., 9,18 mm. 



Habitat: The type, a male, comes from Las Juntas, Department of 

 Santa Cruz, Bolivia, where it was taken in December, 1913. Two 

 additional males and three females from the same locality are also 

 . at hand. They were all taken by J. Steinbach, and belong to C. M. 

 Ace. No. 5060. There are also five males and two females before me 

 from Buena Vista, and three males from Rio Japacani, eastern Bolivia. 

 These also were collected by Steinbach, C. I\I. Ace. No. 5573. 



28. Paramastax nigra Scudder. 



Maslax nigra Scudder, Proc. Bost. Soc. Nat. Hist., XVII, p. 266 (1875). 

 Eumaslax nigra Burr, Essai sur les Eumastacides, p. 55 (1899); Ib., Gen. Ins., 

 Fasc. 15, Orth. Eumast., p. 16 (1903). 



Three males of a species belonging to Paramastax are referred to 

 Scudder's nigra. They come from the Rio Japacani in eastern 

 Bolivia, where they were collected in February, 191 5. C. M. Ace. 

 No. 5573. 



These specimens vary somewhat from Scudder's description, but 

 possibly only owing to the condition of preservation, etc. 



Genus Masyntes Karsch. 



Masynles Karsch, Ent. Nachr., XV, pp. 26, 31 (1889); Burr, Soc. Espan., 

 Hist. Nat., XXVIII, pp. 90, 95, 273 (1899); S.\ussure, Rev. Suisse Zool., XI, 

 p. 99 (1903); Bruner, Ann. Carnegie Mus., VIII, p. 6 (1910). 



29. Masyntes borellii Giglio-Tos. 



Masynles borellii Giglio-Tos, Boll. Mus. Zool. Anat. Comp. Torino, XII, No. 302, 

 p. 17 (1898); Burr, An. Soc. Espaii., Hist. Nat., XXVIII, pp. 90, 274,275 

 (1899); Rehn, Proc. Acad. Nat. Sci. Philad., LIV, p. 67 (1905); Kirby, Syn. 

 Cat. Orth., Ill, p. 79 (191c). 



