



Acridoidea from Madagascar, Comoro Islands and Eastern Africa. 637 
tubereulate and nearly parallel. Ocelli, both middle and lateral, minute. Pronotum subeylindrical, feebly 
carinate in middle (9) or not at all (4); anterior and posterior margins truncate or very broadly rounded, 
the two transverse sulci inconspicuous but continuous over the disk; hind lobe one-half the length of the 
anterior, or less. Anterior and middle legs short, the femora in the males a trifle enlarged; hind femora 
slender, inconspicuously pennate, hind tibiae slender, 8 or 9 spined externally, 9 or 10 spined internally, 
a minute spine present on apex of outer edge. 
The three species at hind may be separated by the following synoptiec table: 
A. General color testaceo-ferruginous, marmorate and dotted with black; inner face of hind femora 
Dip)aesateswilthepiceousgorsnsco Us miearmoratus, 2. Sp: 
AA. General color pale flavo-testaceous in nowise marmorate; inner face of hind femora concolorous. 
b) Carinae and disk of outer face of hind femora nigro-conspersus; lower edges of pronotum, anterior 
portion of mesonotum and hind tibiae tinged more or less strongly with carmine conspersipes n. Sp. 
bb) Carinae and disk of outer face of hind femora concolorous; lower edges of pronotum, anterior 
portion of mesonotum and hind tibiae without the carmine tinge, concolorous gramulosus n. Sp. 
Gymnohippus marmoratus n. sp. Fig. 12. 
This insect may be taken as the type of the genus as the collection contains a specimen in color. 
Length of body, 9, 27 mm, of pronotum, 5 mm, of hind femora, 11 mm, of antennae, 5,5 mm. 
Habitat: Tulear (SW. Madagascar), December, 1903, one 9, and January, 1904, one 9, both 
collected by Voeltzkow, the latter in color, the former in spirits. 
Gymnohippus conspersipes n. sp. 
Length of body, d, 19 mm, 9, 27 mm; of pronotum, d, 3,75 mm, 9, 5,25 mm; of hind femora, d, 
Salos mm sonslledDmm- or antennae, 3, 6,25: mm; ©, 5,5 mm. 
Habitat: Several specimens of both sexes taken during December, 1903, by Voeltzkow at Tulear 
(Madagascar). Unfortunately all of them were collected in either spirits or formalin. 
Gymnohippus granulosus n. sp. Fig. 13. 
Length of body, 4, 16 mm, 9, 22 mm; of pronotum, d, 3,25 mm, 9, 4,5 mm; of hind femora, d, 
9,5 mm, 9, 11 mm; of antennae, d, 6 mm, 9 5 mm. 
Habitat: Like the two preceding species this one was also collected at Tulear (Madagascar), 
_ where Professor Voeltzkow took two males and two females during December, 1903. 
Ixalidium haematoscelis Gerstäcker. 
Four specimens, 1 d and 3 99, of this interesting locust are at hand. One of them was taken at 
Nord Pemba March, 1903, and the others according to the label which they bear come from SW. 
Madagascar. They are identical in size and color, nor can structural differences be detected that would 
separate the Madagascar specimens from the other one coming from Pemba Island. i 
Euthymia melanocerca Stäl. 
One 9 and a very immature d nymph of this species were taken in East Madagascar. The nymph 
was collected during October and the imago in November. 
