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Det indbyrdes Forbold mellem de 5 frie
Forkrops-segmenter er omtrent som hos foregaaende Art. Dog er
næstsidste Segment forholdsvis kortere og bredere. Det viser
oventil den sædvanlige mediane Længdefure, der dog her
er ganske smal og desuden en tydeligt markeret Tværfure,
der krydser hin og til hver Side kløfter sig i 2 Grene, der
begra-ndser det noget convexe laterale Parti, til hvis
Underside de tilsvarende Lemmer er fæstede. Sidste Segment er
kjendeligt smalere end det foregaaende og har de bagre
Sidehjørner kun lidet uddragne og stumpe.
Bagkroppen er af den sædvanlige smale lineære Form
og har Epimererne kun lidet udstaaende til Siderne og,
naar undtages sidste Segment, delt i 2 eller Here Tænder.
Øinene er tydeligt udviklede, men meget smaa og
saaledes beliggende, at de, naar Dyret sees ovenfra, for en
stor Del dækkes af de fra Siderne af Hovedet udgaaende
Smaapigge.
Folerne viser intetsomhelst udmærkende i sin Bygning.
Kindbakkerne er forholdsvis noget kraftigere end hos
foregaaende Art og har Spidsen uoget stærkere
indadkrum-met og den ydre Kant glat, uden noget tydeligt
tandfor-migt Fremspring.
Munddelene og Kodderne skiller sig ikke synderligt fra
samme hos de øvrige Arter. De sidste Organer udmærker
sig dog, sammenlignet med samme hos foregaaende Art.
ved kraftigere Bygning og ved stærkere udviklede
tandfor-mige Fremspring i den indre Kant.
Bagkroppens Buglemmer mangler som hos de 2
foregaaende Arter ganske Børster paa de smalt tungeformige
Endeplader.
Den midterste Haleplade (Fig. 2lj) er af en meget
characteristisk Form. Den er nemlig umiddelbart bag Basis
særdeles stærkt indknebet, saa at det ydre Parti bliver
meget smalt og koniskt tilspidset. Til Spidsen er som hos
foregaaende Art fæstet 2 divergerende Børster, og noget
længere fortil udgaar fra den øvre Flade 2 lignende.
De ydre Halevedhæng skiller sig ikke i nogen
væsentlig Grad fra samme hos de foregaaende Arter.
Parven er temmelig ensformig hvidgraa; kun hist og
her bemærkes nogle spredte, ligesom udviskede
Pigmentpletter af lys gulagtig Farve.
Lamgden er 7m’". altsaa adskilligt større end hos
foregaaende Art.
Larverne (Praniza) (Fig. 27) ligner meget Larverne
af de øvrige bekjendte Arter, men skiller sig ved en noget
undersætsigere Kropsform. Øinene er særdeles store,
indtagende Størsteparten af Hovedets Sider og er forsynede med
et mørkt purpurfarvet Pigment. Legemet er tydeligere
pigmenteret end hos Hannen, med smaa og tætstaaende
røde og gule Punkter, især paa Bagkroppen og den forreste
Del af Forkroppen.
The 5 free segments belonging to the anterior division
exhibit, when compared together, about the same relation
as iu the preceding species. The penultimate segment is
however relatively shorter and broader. Above, it has the
usual median longitudinal sulcus, which here, however, occurs
exceedingly narrow, and, in addition, a distinctly marked
transverse sulcus, traversing the former, and on either side
dividing into 2 branches, that limit the somewhat convex
lateral region, to the under surface of which are attached
the corresponding legs. The last segment is perceptibly
narrower than the preceding, and has the posterior lateral
corners but very slightly produced, and obtuse.
The posterior division of the body has the usual slender,
linear form, with the epimera but slightly projecting toward
the sides, as also, saving the terminal segment, divided into
2 or more teeth.
The eyes are distinctly developed, but very small, and
so located that, on viewing the animal from above, they
appear in great part covered by the minute spikes springing
from the sides of the head.
The antennæ exhibit nothing distinctive in their
structure.
The mandibles have comparatively a somewhat more
powerful development than in the preceding species, with
the point a little more incurved and the outer edge smooth,
without any perceptible dentiform projection.
The oral appendages and the legs do not differ much
from those parts in the other species. The latter organs,
however, are characterized, as compared with those in the
preceding species, by a more powerful structure and more
fully developed dentiform projections on the inner margin.
The pleopoda are, as in the 2 preceding species, wholly
without bristles on the narrow, linguiform terminal plates.
The median caudal plate (tig. 2li) has a very
characteristic form. Immediately posterior to the base, it is
exceedingly constricted, the outer portion becoming thus very
narrow and conically pointed. To the point are attached,
as in the preceding species. 2 diverging bristles, and
somewhat farther anteriorly 2 of a similar kind spring from the
upper surface.
The outer caudal appendages are not essentially
distinguished from those in the 2 preceding species.
Colour a comparatively uniform whity-grey; here and
there only are observed a few scattered and. as it were, partially
effaced patches of pigment, having a light-yellowish colour.
Length 7™m — therefore considerably greater than met
with ill the preceding species.
The larvæ (Praniza) — (fig. 27 ) present a close
resemblance to those of the other known species, but are
characterized by a somewhat more thickset form of ’body.
The eyes are exceedingly large, occupying the greater part
of the sides of the head, and provided with a dark
purple-coloured pigment. The body is more conspicuously coloured
than in the male, with small and closely disposed red and
yellow dots, particularly on the abdomen and the foremost
part of the anterior division of the body.
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