— 470 — 



terior portion of the rather high median carina is crenulate. Tlie 

 complète description of hoth sexes of this insect is to appear in a 

 future number of the Proceedings or Transactions of the Carnegie 

 Museum. 



Chromacris miles Drury. 



This species is represented by two female spécimens. These 

 come frora Iquitos, on the Amazons in north-eastern Peru. 



Prionacris compressa Stâl. 

 A single spécimen of l'rionac-r^ with red-dis]\ed wings is be- 

 fore me as I write. It is referred to eompres'sn Stdl, and was talcen 

 on the i-th day of November, 1906. It comes from the gênerai lo- 

 cality cited as tlie liabitat of the majority of tlie species contained 

 in the présent collection. 



Hysichius nigrispinis Stâl. 

 A pair of apterous locusts talîen at Iquitos, Peru, during Feb- 

 ruary, 1907, are referred hère. They resemble an apterous Omma- 

 tolampis but differ from rei)resentatives of tliat gonus in liaving tiie 

 sulcus of the fastigium confluent with that of the frontal costa and 

 the outer joints of the palpi cylindrical instead of enlarged and 

 flattened. 



Trybliophorus peruvianus, sp. n. 



An insect of rather striJiing appearance in which the dorsum 

 of the pronotum and dorsal angles of the tegmina are darii api)le 

 green, bordered on each side by a narrow bright yellow line wliich 

 extends from the anterior edge of the pronotum to near the middie 

 of the tegmina where it gradually fades away and mingles with the 

 brown costal and green posterior areas. Sides of the face below the 

 eyes and lateral lobes of the pronotum, together with the pleura in 

 advance of the insertion of the iiind femora, also provided with a 

 rallier wide conspicuous yellow band which on the pronotum inclo- 

 ses two or three sunken brown patches and a similar one on each 

 cheek. Vertex and occiput likewise marked with an evenly divergent 

 yellow patch that commences at the fastigium. Legs uniformly tes- 

 taceo-ferruginous; remaining portions of head, pronotum, pleura and 

 under side rieh chocolaté brown; the antennae reddish brown, wings 

 faintly infuscated. 



Head a very littlo narrower than the front edge of the prono- 



