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THYSANURA, MALLOPHAGA. 447
which are noticed below. The greater part of this paper is occupied by an
elaborate outline of the anatomy and classification of the creatures, and details
on experiments undertaken with a view of testing Bourlet's statements
as to the reproduction of lost parts. His experiments were chiefly made
upon the antennae; and he arrives at the conclusion that, although injuries
to these organs are repaired, still a mutilated antenna never regains the
proper number of joints, though the others become increased in length. With
regard to the respiratory system, he adheres to his original statement that
there are only two spiracles in Smynthurus, and that these are situated on the
head, in opposition to the statement of Nicolet, who professed to have observed
a series of abdominal spiracles, and to that of Von Olfers, who could
find only one pair, and these thoracic. The muscular system is minutely
detailed and explained by beautifully executed illustrations on the two plates.
His remarks on the classification of Thysanura are of great value. After reviewing
the position assigned to them by various writers, and considering
their external and internal anatomy, and the absence of metamorphoses, he
arrives at the conclusion that, although more nearly allied to the Insecta
than to the Crustacea -or Arachnida, he cannot regard them as OHhoptera or
Neuroptera, or even as true insects. The Recorder, without venturing to
approve this opinion in its fullest significance, commends it to the notice of
those entomologists who, by including them in Neuroptera or OHhoptera,
help to intensify an already existing chaos of discordant forms.
MTNTIRE, M. J. Micr. Soc. iii. pp. 1-5, pi. xxxvii., enters into a minute
microscopical examination of the scales of various species, and gives magnified
drawings in illustration of his subject. He arrives at the conclusion
that the scales are regularly corrugated as in Lepidoptera, and that there is
no bead-like structure between the membranes, as has been suggested.
BECK, I. c. iv. pp. 252, 253, foUows upon the same subject, and asserts that
the two surfaces are dissimilar, the upper being nearly flat, while the under
is furnished with longitudinal ribs.
Beckia, g. n., Lubbock, I. c. p. 279. Intermediate between Lepidocyrtus
and Degeeria. Body scaly; antennae 4-jointed; thorax not projecting over
head; abdominal segments unequal. Type B. argentea, sp. n., England.
Seira, g. n., Lubbock, I. c. Body scaly; antennae 4-jointed, terminal
segment not ringed; eyes on a dark patch ; thorax not projecting over the
head • abdominal segments unequal. In this are included Degeeria domestics,
Nicolet, and a new species.
Isotoma grisea, sp. n., Lubbock, I. c. p. 278, England.
Seira buskii, sp. n., Lubbock, I. c. p. 280, England.
Campodea americana, sp. n., Packard, P. Bost. Soc. xiii. p. 409, Massa­
chusetts.
MALLOPHAGA.
PACKARD (Am. Nat. 1870, pp. 83-99) gives a well-written semipopular
account of the habits of lice (including Anoplura) with woodcuts, and a plate
of well-executed figures. He also describes and figures several new species,
noticed below. . .
RUDOW (Zeits. gesamm. Naturw. 1870, i. pp. 272-302) continues his researches
upon these parasites. The greater part of his paper is devoted to an
account of the bibliography, anatomy, and modes of life. Although chiefly