188 
Journal New York Entomological Society. 
[Vol. VI. 
femora yellow, the posterior ones except the extreme base and apex, brown ; tibiae 
yellow, the hind ones brown; tarsi brown, the first joint and basal half of the second 
joint of the hind ones, yellow; all femora and the front tibiae bare, middle and hind 
tibiae thinly beset with very short bristles; pulvilli rather large, empodium wanting. 
Halteres brownish, the apical portion of the knobs white. Length, 8 mm. 
Ft. Grant, Arizona. A single specimen collected July 19, 1897, 
by Mr. H. G. Hubbard, after whom this interesting species is named. 
Type No. 4071, U. S. Nat. Museum. 
-♦- 
LIFE-HISTORY OF THE TWO FORMS OF CERURA 
NIVEA. 
By Richard E. Kunze, M.D. 
In Professor Packard’s Monograph on Bombycine Moths, this Ceru- 
rin Moth is mentioned as a varietal form of C. cinerea. Under date 
of August 14, 1897, the doctor wrote me, that there were two pale or 
white forms of cinerea in my region, whose larvae need to be identified.” 
Professor Packard in his monograph states, that the white color of an 
example of C. nivea , in Mr. Palm’s collection, from the Virgin river, 
southern Utah, is evidently the result of the action of bright sunlight, 
heat and dryness. The same conditions exist in the Salt River Valley. 
Phoenix and Yuma hold the record for highest temperature of Arizona, 
that of the former being 117 0 Fahrenheit in the shade, while that of 
Yuma exceeded it by two or three degrees. This information I ob¬ 
tained from U. S. Weather Bureau of this City, and an attache of the 
same formerly stationed in Yuma. My examples of nivea were all col¬ 
lected at light in Phoenix up to the end of June, a few emerged from 
collected cocoons, and of those sent six to Mr. Charles Palm for deter¬ 
mination. The reply stated, that according to the synopsis of Neumoe- 
gen and Dyar, they were Centra nivea , variety of cinerea. Since my 
correspondence with Professor Packard, have taken the autumn brood 
of this insect, from which I bred from ova to pupae and imagines, and 
will now give as a result, that this moth has an undisputed right to rank 
as a species, and not as varietal form of citierea . In its earliest larval 
stages the resemblance is nearer that of cinerea than any.other Cerurine, 
while the last two stages more nearly resemble larvae of C. multiscripta. 
In the East have bred from ova and collected larvae of any number of 
C. cinerea , multiscripta and borealis and well remember the larval life 
of those species. 
