MIGRATORY LOCUST. 55 
give above the main points of the notes with which Mr. Barton 
favoured me. 
The figure of the North American Migratory Locust at p. 58 gives 
as good an idea of those of South America as if taken from one of 
them. The colouring of the specimens sent me was: head mottled, 
of various tints, including reddish pink; the thorax striped lengthwise 
above with various shades of yellowish brown and deeper brown, or 
with deep brown striped with a still deeper shade; hind shanks coral 
red with white spines, black at the tips. The narrow parchment-like 
upper wings have a pale narrow stripe at the fore edge, and also for 
rather more than half the length at the hinder edge, with an area 
between the two stripes, narrow at the base and gradually widening, 
marked with angular brown blotches, these dark near the base, and 
fainter towards the tip of the wing. Beneath these elytra or upper 
wings are folded a pair of large wings of delicate transparent tissue. 
With regard to the precise name of this destructive South American 
Locust. On first receiving specimens, I- forwarded samples to Sefior 
Don Ignacio Bolivar, at Madrid, in order to be absolutely certain on 
the matter, and he was good enough to examine and confirm my 
identification, mentioning that it was ‘‘ without doubt the Acridium (or 
rather the Schistocerca) paranense, Burm., which causes much ravage 
in southern parts of America.’”’ It may also be of some interest to 
note that in the First Report of the U.S.A. Entomological Commission 
it is mentioned that there is so little difference between the Acridium 
americanum, or Migratory Locust of North America, and the Acridium 
peregrinum, the migratory species of South-western Asia and North 
Africa, that ordinary observation would scarcely find any difference 
between the two. Also various writers consider that the Acridium 
peregrinum does not really differ from the A. paranense of the Argentine 
Republic ; and in published observations placed in my hands during 
the past season regarding the local investigations of this serious agri- 
cultural pest of the Argentine Republic, I notice that the name adopted 
is Acridium peregrinum. 
The details of the investigations are not of practical agricultural 
interest here; but on June 2nd I was favoured by a visit from Mr. 
Hy. Watts, Secretary of the South American Land Company, and Mr. 
J. D. Lyon, of the Estancia Trenel, manager of about 120 miles of 
land about 350 miles west of Buenos Ayres, and Mr. Lyon at once 
recognized the specimens sent me by Mr. Barton as the same kind 
which was so exceedingly injurious in his part of the country, where 
he mentioned that they had now been prevalent for seven years; 
and to give some idea of the wide area of infestation, he mentioned on 
one occasion riding through the great swarms or flocks of Locusts 
for about twenty miles, and a friend continuing the observation for 
