586 General Notes. [ September, 
name Microrhyncus is preoccupied, and Alphonse Milne Edwards 
has proposed in its stead the name Weorhyncus. 
Tue Rocky Mountain Locust ın New Mexico.—During a 
recent trip to New Mexico to investigate the southern limits of 
the distribution of Caloptenus spretus, I was enabled to ascertain 
a number of new facts regarding the extreme southern limits of 
this species. According to Ex-governor W. F. Arny, of Santa 
Fé, small swarms of destructive locusts, supposed to be this spe- 
cies, have appeared at a point 140 miles south of Santa Fé. 
Heretofore the U. S. Entomological Commission had been unable 
to trace it south of Taos, N. M., where it was known to have 
been destructive in 1877. From Ex-governor Arny and several 
Mexicans and Pueblo Indians we obtained the following facts, 
which are of general interest. In 1868 the counties of Valentia 
the same Pueblo was visited late in the season. In 1871 Santa 
Fé, and in 1874 Santa Fé and Rio Ariba counties, including 
several Pueblo Indian towns, were invaded. In 1873 Colfax county 
came from the west or south-west, in July, and passed up into 
Rio-Ariba and Taos counties, crossing into Costilla county, Col- 
orado. From these facts it seems that the northern half o New 
Mexico, and probably Northern Arizona, are occasionally subject 
to invasions of locusts from Southern Colorado ; but the flights 
are sporadic and local, and occur after the wheat crop has been 
mostly harvested: Whether on account of droughts or locusts, 
or from both causes, the Pueblo Indians have, like the Egyptians 
of old, been in the habit of laying up stores of wheat and corn 
two and three years in advance.—A. S. Packard, Fr. 
ZodLocicaL Nores.—We take the following notes from late 
numbers of Nature: Dr. Fritz Müller has sent from Brazil a 
trichopterous insect belonging to the Leptoceride, remarkable on 
account of its showing, very distinctly, branchia such as have 
lately been discovered in the imago state of this group by De 2 
Palmén. M. Jourdain has read a paper before the F rench 
Academy on the respiratory apparatus of Ampullaria, a fresh- 
water mollusk.——The muscles of crayfish have been studi 
from a physiological point of view by M. Richet, the muscles of 
the clam have a high degree of contractibility. ..sorensen, = 
in his studies on the apparatus of sound in various South Ameri- 
can fishes, finds that vibrations are communicated to the air of the 
