64 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 
rim of Forskal and Niebukr seen in Arabia was evidently A. peregrinum, 
as were the locusts encountered by Palgrave on the LTasa plains. The 
species seen by Morier migrating in Southern Persia was not P. migra- 
torius. The species seen by Salt at Bombay, which he asserts is the 
same as that observed on the coast of Abyssinia, is described as follows, 
and is certainly different from the P. migratorius : 
The head and shoulders of the insect are armed with a thick shell or case ; that of 
the head has a dull leaden gray color -when alive, interrupted with red; the shoulder 
plato being of a reddish brown, spotted with white, smooth in front, and rough on 
the hinder part ; the eye is bright yellow, with three black bars across it ; feelers or 
hornsblack; thewings [elytra, wosuppose] are of a yellowish-brown, lower part tinged 
with a fine purple, and tho whole obscurely dotted with black. The legs are exter- 
nally of a leaden gray color, tho upper part shading off into black; the ribs also 
deep black, inside of second joint bright purple, and the thorns scarlet, tipped with 
black ; the extremities being formed of triangular shells formed of two sharp claws 
and a knob in the center, smooth and round. 
The figure in the plate is evidently a female Acridium; at least the 
thorax, wings, and abdomen would indicate this. 
In a note to Mr. Thomas, Mr. S. H. Scudder suggests that it may be 
the Acridium Mgyptium of Linneaus ; but this, according to Stal, 16 * is 
synonomous with Gryllus lineola, Thunb 165 and A. tartaricum Fisch. 106 
(not G. tartaricus Linn). 
Fischer has doubtless included two or three species under his A. tar- 
taricum. 
Charpentier, 107 who separated A. lineola with some doubt, remarks, tin- 
der the latter, that Germar informs him in letters that this species is 
found in the East Indies. It is also more than probable that it has 
been included by some authors under A. succinctum also, especially those 
examples from the East Indies. The remark in the South Australian 
Register also agrees with Salt's statement. 
Wahl, it is true, affirms that swarms of P. migratorius are seen in 
India, but also adds that another species, a kind of yellow locusts, called 
Tscheddy, often covers whole fields and darkens the air like a cloud. 
Major Moor asserts that the destructive species of this country is " blood- 
red" and not the P. migratorius. That the locust infesting the Phi- 
lippine Islands is not the latter species is clear from the statements 
of Gironiere and Jagor and the figure given by the former traveler; 
whether it is an Acridium or an (Edipoda is a matter of doubt. 
These facts, together with our knowledge of the general laws that 
govern Acridian life, lead us to the conclusion that although P. migra- 
torius is found in this part of tropical Asia, yet that A. peregrinum is 
really the prevailing migratory species. 
Is it found in Africa as a migratory species ? Judging from all the 
data we have been able to obtain, we are convinced it is not. 
1M "Kecensio Orthopterorum," I, 63. 
i«Mem. Acad. Pet., 5, p. 247, 1815. 
'"Orthop. Europe., 388. 
I6, Horae Entomologicae, 131. 
