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(ORDER—ORTHOPTERA.
PLATE XXXIL
SECTION—AMBULATORIA.
FIGURE 1.
FAMILY—PHASMID JÎ . )
BACTERIA SARMENTOSA. WESTW.
Bacteria luteo-fusca, («va viriclis ?) capite orali macula nigra verticis postice furcata ; pronoto fusco-vittato,
corpore omni Iteve, femoribus omnibus spinosis, tibiis anticis valde elongatis fere inermibus, 4 posticis spinulosis ;
intermecliis spinula unica versus basin marginis superi paullo majori, tarsis omnibus articulo basali elongato
compresso ; ovicluctu fceminoe vakle elongato angusto naviculari.
Bacteria dirty-brown (green while alive ?) the head oval, having a black spot behind the antennas posteriorly
forked, the pronotum with brown streaks ; the entire body smooth ; all the thighs spined ; the fore tibioe very much
elongated, and nearly destitute of spines ; the four posterior armed with small spines ; the intermediate pair, with
one of the spines near the base of the upper margin, rather larger than the rest ; all the tarsi with the basal joint
elongated, compressed ; the oviduct of the female very long, naiTow, and boat-shaped.
Length of the female insect, including the ovipositor, 10:^ inches.
Inliabits Sylliet. In CoU. Westw., &c.
OBSERVATIONS.—This species of walking-stick insect is longer than any which I have yet seen. It
is represented of the natui-al size, hut its ftûl extent is here decreased by unnaturally bending
back the fore legs (in order to bring them into the plate) which in the liràig insect are directed straight
forwards. The head is oval, posteriorly elevated and rather longer than the pronotum ; it has two
small impressions on the vertex between the back of the eyes ; the pronotum is rather longer than
broad ; the mesothorax is rather more than two inches long, narrowed in front, rather depressed,
and entirely simple ; the metathorax is 1 i inch long, of equal breadth throughout ; simple, with a
small oblique tubercle on each side in front of the base of the hind legs and with a lateral fold on
each side above their insertion, within which is a minute spiracle. The abdomen is 6 inches long,
gradually narrowed, with the tip trimcate ; it is simple above, with the sides of the 2nd, 3rd, 4th, 5th,
and 6th segments rather dilated and deflexed ; the extremity of the 6th ventral segment is armed with
a deflexed bifid poiut at the base of the oviduct which is 2 inches long. The fore legs are inches
long; the thighs with two rows of spines ; the tibioe are scarcely spinose ; the basal joint of the tarsi
is as loug as all the other joints together ; the tarsi, as well as all the parts of the feet, are triquetrous,
but the posterior thighs have the upper angle truncated so that they have four rows of spines, as have
also the tibiic, but the spines of the latter are much smaller, except one spine on the upper margin
near the base of the intermediate tibiae, the basal joint of the tarsi in the four hind legs is not quite so
long as the fom' following joints.
The insect above described is a female; I possess also another female, which I consider to belong to
the same spccies, which is only inches long, and agrees T\T.th it in all its characters, except that the
6th ventral segment has only a minute oval sulcated tubercle at its extremity.
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