632 General Notes. : [June, 
to maturity within the nymph and hatched as soon as she became 
an imago.” 
The young are then described; and the term nymph, since the 
larval and pupal stages are so much alike, is applied to all the 
“subaqueous stages in the development of the young after it i$ 
hatched.” They mostly feed upon either mud or minute aquatic 
vegetation, such as covers stones and the larger plants; but 
(judging by their mandibles and maxilla) some must be pre 
daceous. The nymph of Palingenia is said to remain such one 
year. 
The character and peculiarities of the nymph are given in great 
detail; while the means of distinguishing the subimago from 
adult are stated. After a history of the classification of the Eph- 
emeridæ, the bulk of the memoir is devoted to the systemate 
description of the genera and species. The illustrations are ge 
worthy from the attention given to the venation of the wings 
other details, which, of course, add vastly to the value and el 
manency of the work; twenty-four plates being filled with 
sketches, which are drawn upon a large scale. 
Notes on Motus.—We have long had a specimen mahi 
rare Sphinx elsa Strecker, from Salt Lake City, Utah, en ie 
Mr. J. L. Barfoot, curator of the Salt Lake musei see 
originally described by Strecker wag Arizona, E 
in his “ Lepidoptera, indigenous and exotic. 1 
from the 3 a aa a peculiarly faded and banon 
pearance, probably resulting from the light soil and brig 
Utah and adjoining territories. 
Smerinthus imperator Strecker occurred in a coll i 
from Reno, Nevada, presented to us in 1877 by pres dly the sam 
It agrees well with Strecker’s figure, and is undou r á imens 
as the Arizona form; but until we have a suite 0 Ae H. Bat 
the Eastern S. modestus and the Western var. encore decide 
from the Pacific coast for comparison, it will be di f the Atlantic 
whether it is specifically distinct from S. modestus © 
coast. interest 
; ofin 
The following faunal notes on Bomby cidæ maya itigh 
Stenopis argenteomaculatus Harris, was taken agi ar silvery 
in Gilead, Maine, in July. The second one a arris’ figure 
spot is obsolete; but the specimen agrees idle has beet taket 
the style of marking. Stenopis argentata Pack., y pelonging t? 
twice in Providence, in 1883, in June. One eamh 
. G. E. Gray lacks the second outer silvery = have rece! 
From Mr. J. L. Barfoot, of Salt Lake Om W“ Utah, and ie 
Pyrrharctia isabella; from Dr. Palmer, in Soulner™ hite pleach? 
Mr. Siler, of Ranch, Utah, specimens © ve ects 35 wrong 
Pseudohazis hera, showing the same climatic € 
ection of moths, 
