Article beginning on page 573.
Psyche 6:573-?, 1891.

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December 1893.1 ps2TfYE. 5 73
that it could not be separated from M, albus which I lately described from specimens on a malvaceous plant in Jamaica! There are differences, indeed, in the color of the exuviae and other small points, whereon a new
variety is founded -but after comparing
concolor with the types of albus, I can see nothing to separate them specifically.
Thus we have :-
(a.) albus. Jamaica, on a malvaceous plant, alt. 50 feet above the sea, climate very humid, tropical.
(b.) albas v. concolor.
New Mexico, on a
chenopodiaceous plant, alt. 3,800 ft., climate very dry, not 'tropical. (One can scarcely say temperate, the summer heat being
greater than in Jamaica). Truly a singular distribution !
A NOTE ON- THE LARVA OF DATANA FLORIDANA GRAEF. BY HARRISON G. DYAR.
Having examined some specimens of the
larva of Datana floridam in the collection of the Museum of Comparative Zoology at
Cambridge, I am able to confirm the des- cription by Mr. Koebele (Bull. Brooklyn ent. soc. iv, 21) and to add that the lateral lines are slightly broader than the intervening black spaces, or as broad ; not confluent at the ex- tremities. The large, normal hairs are white, and arise singly from minute tubercles; the fine, short (secondary) hairs are black, very inconspicuous without a lens, and not differ- ing from the corresponding structures in D. major and D. falmii. The species is closely allied to D, palmit, and may prove, on farther investigation, to be not specifically distinct. The following table may replace the one given by me (Ent. amer. vi, 132). I include the names of the three species whose larvae are unknown, in the order in which they will probably be found to belong.
MATURE LARVAE (Stage V) .
Secondary hairs much shorter than primary ones. Hairs concolorous, pale,
Cervical shield black. . . . . . . . . . . . angu sii. Cervical shield yellow.
Lateral lines separate at extremities. . . . . . . nzinistra. [californica] .
Lateral lines confluent at extremities. . . . . . . dresselii. Hairs not concolorous.
Secondary hairs black ; head red.
Lateral stripes broken into spots. . . . . . . - . . major. Lateral stripes continuous.
Stripes narrower than the subdorsal black space; head pale red. faima.
. . . Stripes broader than this space; head dark red. floridana. [nzodesta].
Secondary hairs brown ; head black or red. . $ers$icua. [rohsta] .
Secondary hairs nearly as long as primary, concolorous. . . . . . . . . . .
Cervical shield black. in fegerrima.
Cervical shield yellow. . , . . . . . . . . contracts.



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PS2'-CHE. 1 December 1893.
THE SEVENTH VOLUME OF PSTCHE
Begins in January, 1894, and continues through three years. The subscription
price (payable in advance) is $5.00 per volume, or $2.00 per year, postpaid. The
numbers will be issued, as in Vol. 6, on the first day of every month and will con- tain at least 12 pages each. No more than this was promised for the sixth volume, but the numbers have actually averaged more than 16 pages, and in addition 21 plates have been given and more than 50 other illustrations. We prefer to let
performance outrun promise, but when a larger subscription list warrants it, we shall definitely increase the number of pages. Vols. 1-6, Complete, Unbound, - Now sold for $29.00. Vols. 1-6, and Subscription to Volume 7, - - $33.00. -
JUST PUBLISHED.
Scudder's Brief Guide to the Com-
moner Butterflies.
By SAMUEL H. SCUDDER, author of "But-
terflies of the Eastern United States and Canada,"etc. xi + 206 pp. 12mo. $1.25.
An introduction, for the young student, to the names and something of the relationship and lives of our commoner butterflies. The author has selected for treatment the butter- flies, less than one hundred in number, which would be almost surely met with by an in- dustrious collector in a course of a year's or two year's work in our Northern
States east
of the Great Plains, and in Canada. While all the apparatus necessary to identify these butterflies, in their earlier as well as perfect stage, is supplied, it is far from the author's purpose to treat them as if they were so many mere postage-stamps to be classified and ar- ranged in a cabinet. He has accordingly
added to the descriptions of the different spe- cies, their most obvious stages, some of the curious facts concerning their periodicity and their habits of life.
A short introduction to
the study of butterflies in general is prefixed to the work, and is followed by a brief account of the principal literature of the subject. Scudder's The Life of a Butterfly.
A Chapter in Natural History for
the General Reader.
By SAMUEL H. SCUDDER. 186 pp. 16mo.
$1.00.
In this book the author has tried to present in untechnical language the story of the life of one of our most conspicuous American
butterflies. At the same time, by introduc- ing into the
account of its anatomy, devel-
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general account of the
lives of the whole tribe. By using a single butterfly as a special text, one may discourse at pleasure of many; and in the limited field which our native butterflies cover, this meth- od has a certain advantage from its simplicity and directness.
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NEW YORK.
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