Article beginning on page 344.
Psyche 7:344-345, 1894.

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wilh small, irregularly dispo.+d fuscons than usual, presenting a markedly lasciate dots. Jndividniils sonieti~nes huve the appearance ; lhis fonn is not uncommon longi!udiniil mill-kings much more distiiicl a1 West Chop, M. V. NEW SPECIES
BY JUSTUS WATSON POLS
Head translucent orange ochraceoiis, orange around mouth ; eyes block; a few stiff, white bristles upon vertex and face. Ariteniiae nearly as long as body, orange, becoming purplish on las~ two segments; basal segment nakt.d; wmnd four times the first in length, a few hairs distally; third equalling the second plus one-half the first, verticillate; terminal segment twice the basal, whorled as usual. Thonix yellow. Abdomen oval
in dorsal aspect, dark purple, almost black, covering the sides and meeting the pale
ventral surface with a well-defined but zig- mg margin ; on posterior half of dorsum, a yellowish brown pattern, very variable
(sometimes almost absent) hut consisting fundamentally of a median elongated mark widening- behind nnd one quarter the length of the abdomen, lying betwccr~ four rounded triangula'r spots, the anterior pair of which are more or less three-lobed. These five spots may be separate, but the three anterior .iisually unite into a figure having a large posterior median lobe, three lateral lobes and a large anterior median sinus; the two posterior spots may unite to form a long, irregular crescent before the apex of the abdomen; abdomen with a few fchort, while hrihiles 011 apical half: inan! two or three times longer upon the yellow anai tubercle. LCå£- yellow, paler at bxse ; tibia spiii~ ; claws transparent, slender, riither straight, little curved inside; superior claw with a sharp tooth inside, one third from apex; second tonth obscure, in the middle; inferior claw two thirds the other in length, with one ~loi.~, knobbed tenent hair, t̤-ic as long, OM, CAMBRIDGE, MASS.
fixed to its inner side except at the tip, whic!i is free. Furcula (T~illberg's mime for the spring') extending to mouth, stout, pale yellow at base, becoming white distally ; inanubriuin (basal segment) over two thirds the denies (middle segments) in length;
denies three times mucrones (apical seg- ments), each dens with a row of long spines on either side; mucrones cylindrical, upex rounded, minutely serrate beneath; ventral abdoinina.1 surface with an oval. yellow swelling either side the maniibrium and two similar but much largeroiies placed obliquely and anteriorly. Average length, 1.3 mm, ; maximum, 1.5 mm.
Described from over twenty specimens
collected by me in October and early No- vcniber, ~895, ;it Arlington, Mass, This active, unr,ommon species occurred in pine woods under ditmp, decaying twig;, and
needles.
Chestnut brown, except for white claws,
mucrones and bristles. Head paler; eves
black; a few short, stiff bristles upon a protuberance on vertex and down sicks of face. Antennae four-fifths the length of body; basal segment &tout, naked; second four times as long, a few long hitirs distdly ; third equiillingtlie first two, with distal half of seven false sub-segments and three less evident, swollen terimiiial ones; each sub- segment vith a pair of hairs; a few lisiirs near base of third segmcnt; fourth equal to basal, with short hairs. Abdomen ovate
dorsally. dilated at sides; dors~im dxrkei, with several long while bristles :interiorly



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February 1896.1
and very short bristles posteriorly; anal tubercle with long, stiff bristles. Legs long, slender, spiny, especially on tibia; superior claw long, rather straight, clearly bidenttite inside, with a sharp tooth inf the middle and another midway between it and the tip; a third tooth on the outside, nearly opposite the last; inferior claw with straight, tapering sides and an apical hair hardly longer than the other claw; the extreme tip of the claw is really free from the hair; on the inside of the inferior claw, near the base, is a dilation whose apex bears a short bristle. Furcula pale, extending beyond ventral tube; manu- brium stout; each dens with a row of long spines on either side; mucrones tapering, one-third length of dentes, coarsely serrate beneath. Average length, 1.6 mm.
Described from twelve specimens found
during October and until middle November at Arlington, Mass.
This species eats wet, decaying wood on
the under side of pine Iogs, Us color being mimetic. The last specimens found, before severe frost, were all females, which laid numerous eggs in captivity when given
natural conditions of moist food, air and darkness. These eggs, laid singly, were
spherical with strongly flattened base, trans- lucent white, smooth, .a mm. in diameter. 15 mm. high and with embryo quite unde-
veloped several days after deposition.
Dark purple, nlinost black, with conspicu- ous wax-yellow patterns.
Head large; face
with large markings and a few short bristles; vertex with a few longer bristles and a stirrup- shaped mark on middle; behind this, a long, ,
broken, transverse 'band; eyes black; an- tennae seven-tenths the length of body,
purplish; basal segment twice as thick as second, crenate apically; second on anterior edge of first, five times as long, somewhat petiolate, with a few hairs; third equalling first two, slightly petiolate, ur.uiuaHy form- ing false sub-segments distally, of which seven are evident, followed by three swollen ones, the penultimate sub-segment being
much dilated; terminal segment equal to
basal in length; third and fourth segtnents with whorls of long hnirs. Abdomen ovate dorsally, with a large pattern composed
principally of thick median longitudinal and oblique bars; on anterior third of dorsum, a median bar whose posterior end meets the vertices of two widely V-shaped marks, one ,
un either side; behind this, a roughly scisaor- like pattern with two long oblique branches, on either side and a short, median anterior lobe; on apical half of dorsum, a roughly anchor-shaped marking and two large, pale yellow tubercles, one on either side; dorsinn with a few long bristles anteriorly, many shorter ones posteriorly; sides with large roundish and elongiited spots; anal tubercle large, with several large spots and many longistiff bristles. Legs very long, slender, hairy, with broad alternate bands of purple and yellow except on tibia; claws white; superior claw long, of rather uniform width, bent only towards tip, divided on the inside nearly into thirds by two prominent teeth; inferior claw halfas long, long conical, free at extreme tip but apparently prolonged into a bristle a little longer than the claw; a short bristle on inside of inferior claw at its base. Furculn long, nearly reaching the mouth, purplish ; each dens with a row of long spines on either side; milcrones white, cylindtical, apex rounded, one-third length of dentes, serrate beneath. Length, 2.2 mm.
Four specimens of this species were found in company with P. $ini and also laid a few eggs in captivity. These eggs differed froin those of P. pinionly by being a. little larger. Types of the above species have been
deposited in the Cambridge Museum of
Comparative Zofilogy. I wish to thnnk Mr. Samuel Henshnw, of the museum, for In's
kindness in supplying me with types as well as literature of Thysanura.




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