

Acridoidea from Madagascar, Comoro Islands and Eastern Africa. 631 
Gelastorrhinus edax Saussure. 
The @. edae of Saussure is represented by two female specimens taken during the month of 
February, 1904. They bear the locality label, Andranohinaly (SW. Madagaskar), Waldgebiet. 
Although this genus is placed with the Mesopes in the family Acridiidae by both Brunner, 
Wattenwyl and Saussure, there is no doubt but that it is a Tryxalid. The large number of spines 
(17 or more) on the hind tibiae, as well as the vertex characters, are abnormal for representatives of the 
Acridiidae, while they are the chief characteristics of certain of the Tryxalidae. The spined (weakly) 
prosternum is no criterion for placing this and several other genera which are otherwise normal Tryxalids 
among the representatives of the other family. 
Phloeoba chloronata Pal. Beauv. 
A pair of this, to me very interesting, locust is at hand. One of the specimens, the male, comes 
from SW. Madagascar where it was collected at Tulear, and the other, the female, at Imerina. 
This insect at first glance reminds a person very strongly of the American Truzwalis brevicornis 
Linnaeus. In fact when I first saw the male of the present species I imagined that it was our American 
insect coming from a new locality. An examination of the subcostal area of its wings at once told me 
different. In Truzxalis this area is distinctly fenestrate in the male, while in Phloeoba it is not. 
Phloeoba basalis Walker. 
A third specimen of Phloeoba that bears the label Chake-Chake (Britisch O. Afrika), Insel Pemba, 
I determined as Walkers basalis. It was taken on the 14th of April, 1903. 
Oxycoryphus compressicornis Latreille. 
Among the other Tryxalids I find a single female specimen of what I determine as O0. compressicornis. 
It comes from Tulear (SW. Madagaskar). 
Paracinema tricolor Thunberg. 
This species is represented by a rather large series of specimens coming from both Madagascar 
and the African coast. It varies considerably both as to size and coloration. Judging from dried specimens, 
it must be a beautiful insect when living. It is evidently a common grasshopper. 
Gymnobothrus madacassus n. sp. Fig. 9, 10. 
A moderately large species for the genus in which the lateral carinae of the pronotum diverge 
quite strongly both anteriorly and posteriorly, and approach most closely at the anterior transverse.sulcus 
instead of back of this point. 
Head about as wide as the anterior edge of the pronotum, the vertex as long as wide (9) or a 
little longer (3), the suleus quite well defined but not very deep, in the female abruptly ending at a line 
drawn from the anterior upper extremity of the eyes, in the male continued further to the rear where it 
fades insensibly; lateral foveolae present but small, narrow, arcuate; frontal costa fairly prominent, the 
