180 Mr. Albert Miiller on the dispersal 
middle of November 1865, and at about the same period 
in 1866, in the streets and houses of Buenos Ayres, and 
that they were wafted there by the Pampéro, the stormy 
west wind, which brings bright weather from the neigh- 
bouring Pampa, after the rain. It is stated, that this 
was a “true rain” of insects, and that the houses, 
cellars, terraces, rooms, &c., were swarming with the 
creatures. Dr. C. A. Dohrn says, in allusion to this fact, 
which was observed by Strobel, that, if the latter were 
right in his supposition that the said insect rain in 
November is a periodical event, Professor Burmeister 
would certainly be in a position either to confirm, or 
negatively to answer it.* In connection with this record, 
it seems desirable to mention that Professor Lacordaire 
says, in his “ Introduction 4 l’Entomologie, p. 494, that 
for two consecutive years, while he was at Buenos Ayres, 
this town was, every spring, for eight days, visited by 
millions of Harpalus cupripennis, which arrived daily in 
the dawn of the morning, and had to be swept away 
every morning from the outside of the houses, where 
they were piled up several feet in height.” + Professor 
Westwood has recorded swarms of Harpalus near Dover, 
on the 12th August, 1839. { 
Monsieur Rouzet states, that on the 21st May 1856, 
the exterior Boulevard of the Barriére du Pére Lachaise 
at Paris, was covered with multitudes of Rhizophagus 
parallelicollis, Gyll., to a height of from five to six milli- 
métres, and along the walls they lay a centimetre high, 
for a distance of more than a kilometre. A storm came 
on in the evening and swept them all away, so that 
none were left the next day.— Bulletin de la Soc. Ent. de 
France, 1856, p. li. 
Captain Fitzroy tells us in his “ Narrative of the Sur- 
veying Voyages of H.M. ships ‘ Adventure’ and ‘ Beagle,’ 
that, “‘ between the La Plata and the Rio Negro, myriads 
of white butterflies surrounded the ships in such quanti- 
ties that the seamen said, ‘it snows butterflies !’” They 
were brought by a gale from the north-west, which in- 
creased for a time. 
* Stettin. Ent. Z., 1870, p. 428. 
+ Quoted by Cornelius, ‘ Wanderthiere,’ p. 230. 
{} Trans. Ent. Soc. Lond. ser. 1. vol. V., proc., p. 24. 
