128 Annals of the Carnegie Museum. 



testaceous or dull salmon-colored broadly streaked with olive-green. 

 The former with the frontal costa, lateral facial carinse, and front 

 edge of mandibles, a dash from the lower edge of eyes to lower hind 

 angle of cheeks, the vertex and occiput on the latter divided by a 

 forward projecting wedge of the salmon-color, olive-green. Pronotum 

 with a broad slightly widening median, longitudinal light band, 

 bordered on each side of disk by one of olive-green, and below this 

 another light band followed by an oblique one of the green, the lower 

 edge obliquely and rather broadly pale, a little lighter than the remain- 

 ing light portions. Pleura with two oblique green bands between 

 others of the salmon-color. Upper half of hind femora greenish, the 

 lower half pale; hind tibiae red, with black-tipped pale spines; middle 

 and front femora greenish, the tibiae and tarsi reddish. Under side 

 of body pale testaceous, abdomen above with more or less of a greenish 

 olive tinge. Tegmina with a broad pale dorsal band and a whitish 

 costal one on basal half; disk brown with a pale longitudinal median 

 streak, the bounding longitudinal veins of the discal area red. Wings 

 somewhat infumated. Antennae in the male red basally, darker 

 apically, in the female lighter, reddish testaceous. 



Length of body, cf , 52 mm.. 9 , 69 mm.; x of antennae, cT , 16 mm., 

 9 , 19 mm.; of pronotum, cf , 10.5 mm., 9 , 13 mm.; of tegmina, d* , 

 49 mm., 9 , 63 mm.; of hind femora, cf, 26 mm., 9 . 36 mm. 



Habitat.— One male and one female, Cacagualito (1,500 ft.), Dept. 

 Magdalena, Colombia, S. A., during the month of November. Types 

 in Carnegie Museum. 



This is by all odds the most attractive species of the genus which 

 has thus far come to light, and differs so greatly from all the described 

 forms that a knowledge of its haunts would be interesting. A smaller 

 and somewhat similarly colored species occurs in the vicinity of Sao 

 Paulo, Brazil. The latter is the insect which Rehn described as 

 Schistocerca gratissima (Proc. Acad. Nat. Sci. Philad., Feb., 1908, pp. 

 20-22, figs. 4, 5). 



Genus Atrachelacris Grglio-Tos. 



Atrachelacris Giglio-Tos, Boll. Mus. Zool. Anat. Comp. Torino, IX, no. 184 

 pp. 19-20 (1894). 



The genus Atrachelacris is confined to southern Brazil and south- 

 ward. Its representatives are unicolorous, green, and somewhat 

 hirsute. They differ from the representatives of Dichropliis, their 

 nearest ally, in the comparatively smaller head. 



