Bruner : South American Acridoidea. 51 



throughout with black granules. The tegmina conspicuously strigatc 

 with fuscous along the border and longitudinal veins. Wings with 

 the disk and border colored much as in T. angulatus Stal. Sides of 

 pronotum and pleura also more or less strigate with fuscous. Hind 

 tibia? oi the general color, the spines black-tipped. 



Length of body, cf, 31 mm., 9 . 45 mm.; of pronotum, cf , 11 nun., 



. [5.5 mm.; of tegmina, cf, 29 mm., 9. 41 mm.; of hind femora, cf, 

 20 mm., 9 . 26 mm. 



Habitat. — This insect conies from Chapada, Brazil, where it was 

 collected by II. II. Smith. The type is contained in the collection 

 of the Carnegie Museum. 



Aside Irom the color variations this insect differs from typical 

 angulatus in the longer, narrower tegmina and wings, and in having 

 eleven instead of nine or ten spines on the outer margin of the hind 

 tibiae. In addition to the present form there are two or three others 

 which occur in the same general region. It is quite probable that 

 these variations represent several species now in the course of forma- 

 tion. 



69. Diedronotus fuscipennis sp. nor. 



A rather large, robust, moderately granular species, with wide 

 tegmina and wings, in which the median carina of the pronotum is 

 profoundly severed by the transverse sulci as in mexicanus, angulatus, 

 and discoideus. In general appearance it approaches the former more 

 closely. 



Head of moderate size, set into the front edge of the robust pronotum 

 nearly to the hind margin of the small eyes; vertex somewhat wider 

 than the short diameter of one of the eyes, the fastigium horizontal, 

 flat, with a longitudinal median carina, which continues over the 

 occiput, its lateral edges straight and meeting in front at about a 

 right angle. Frontal costa prominent, gently sulcate, from between 

 the antennae nearly to the clypeus, the sides gently approaching just 

 below the ocellus. Antenn.e very gently ensiform; the eyes about 

 three-fifths the length of the anterior edge of the cheeks below them. 

 Pronotum robust, the median carina cristate, of moderate altitude, 

 straight on the anterior, arcuate on the posterior lobe, where it is 

 gently crenulate; lateral carina} crenulate or nodulose, broadly arcu- 

 ate, rounded, joining with the posterior lateral edges of the disk 

 instead of at an angle as in angulatus and strigatus; the anterior edge 

 of disk a right-angle instead of acute, the hind margin somewhat 



