123 
Eindesteder. Stilt. 33, 51, 192, 290. 
Bemserkninger. Den her omhandlede Art ligner i 
Aniindelige Habitus meget den typiske Form, N. ob- 
0n 9US, men skiller sig temmelig bestemt ved Hovedets for- 
Ajellige Form og ved de 2 charaeteristiske tandformige 
lemspring i Enden af Bagkroppen, hvilkeu sidste Char- 
acdor hai- givet Anledning til Artsbenawnelsen. Ogsaa i 
de a natomiske Detailler viser den enkelte distincte Afvigel- 
Sei ’ na vnlig hvad lste Par Foie re angaar. 
Beskrivelse af Hunnen. Legemet er, seet ovenfra 
6^- Fig. 31) af temmelig regelmsessig affang oval Form, 
lne d den storste Brede, der er beliggende paa Midten, kjen- 
deligt mindre end den halve Lmngde. Hole llygsiden er 
J°\nt hvffilvet og de noget pladeformige Epimerer danner 
sammen med Hovedets og Bagkropssegmentets Sider en 
temmelig jevnt buet Linie, der kun er afbrut ved meget 
sniale Indsnit mellem Segmenterne. 
Integumenterne er af temmelig fast Consistens og kun 
nlet gjennemsigtige, samt viser under Mikroskopet en tint 
granuleret Skulptur. 
Hovedet er af forholdsvis betydelig Storrelse og ikke 
' ed nogen mmrkbar Indknibning afsat fra Forkroppen. Det 
01 U;es ten af halvcirkeldannet Form og viser fortil i Midten 
' Ul1 e t meget lidet og stumpt knudeformigt Fromspring, 
'oriniod der hos den anden Art her Andes en temmelig 
stmrkt fremstaaende og i Enden tvekloftet Pandeplade. 
Af Forkroppens Segmenter er det lste og sidste kor- 
test , 4de storst. Alle liar Epimererne afstumpede i Enden 
110 gne, uden nogen bemserkelig Haarbesmtning. 
Bagkropssegmentet, der ligesaalidt som Hovedet er 
skarpt afsat fra Forkroppen, er omtrent af demies halve 
cengde, oventil jevnt hvadvet og bagtil jevnt afsmalnende. 
ndc>n er ikke som hos den typiske Art afrundet, men af- 
nttot, med ethyert af Sidehjornerne udtrukket i et kort 
a gudrettet tandformigt Fremspring. Midt imellein disse 
lemspring danner den bagre Kant af Segmentet en ganske 
®' a g Udbugtning, paa hvis Underside Analaabningen er 
keliggende. 
Af 0ine Andes ligesaalidt som hos den typiske Art 
det nngeste Spor. 
lste Par Foie re (Fig. 32) er af et fra samme hos 
‘ °blongus temmelig forskjelligt Udseeude. De er her 
uldkonrmen normalt udviklede og omtrent af Hovedets 
•nngde, med tydelig Adskillelse mellem Skaft og Svpbe. 
^ Skaftets Led er de 2 forste storst og ved Enden for- 
s > nede med en Del temmelig lange penselformige Horebor- 
ste ‘ l 'i s idste Led er derimod ganske lidet og tager sig mere 
som tilhorende selve Svpben. Denne er her af ssedvanlig 
Igningj omtrent saa lang som Skaftets 2 sidste Led til- 
sa| iunen og bestaaende af 4 tydeligt begrmndsede Led, 
Locality. — Stats. 33, 51, 192, 290. 
Remarks. — The species treated of here presents in 
its general habitus a marked resemblance to the typical 
form, N. oblongus, but differs very decidedly in the deviat- 
ing form of the head and the 2 characteristic dentiform 
projections at the extremity of the abdomen; indeed, from 
this latter character the speciAe designation is derived. 
Moreover, in the various anatomical details, both species 
exhibit unmistakeable deviations, more particularly as 
regards the 1st pair of antenna. 
Description of the Female. — The body, viewed 
from above (PL X, Ag. 31), has a comparatively regular 
oblongo-oval form, with its greatest breadth occurring in 
the middle, perceptibly less than half the length. The whole 
of the dorsal side is uniformly arched, and the somewhat 
lamelliform epimera form, along with the sides of the head 
and the abdominal segment, an almost uniformly arcuate 
line, disrupted only by very narrow incisions between the 
segments. 
The integuments are rather compact in substance, 
and but slightly translucent; under the microscope, they 
exhibit a Anely granulous sculpturing. 
The head is comparatively large, and not marked off 
by any noticeable instriction from the succeeding part. It 
has a well-nigh semicircular form, and exhibits anteriorly, 
in the middle, merely a very small and obtuse-tubereuliform 
projection, whereas in the other species occurs here a 
rather prominently projecting frontal plate, bifurcate at 
the extremity. 
Of the free segments, the Arst and last are the shortest, 
the 4th being the largest. All have the epimera obtuse 
at the extremity, and naked, without any perceptible cloth- 
ing of hair. 
The abdominal segment, like the head, not distinctly 
marked off from the anterior division, measuring about half 
the length of the latter, is uniformly arched above and 
tapers gradually backward. The extremity not, as in the 
typical species, rounded, but truncate, with each of the 
lateral corners drawn out as a short, posteriorly directed, 
dentiform projection. Between these projections, the pos- 
terior margin of the segment jutting out very slightly in 
the middle^ and here is observed, on the under surface, the 
anal oriAce. _ 
Of eyes, as in the typical species, no trace whatever. 
The 1st pair of antennae (Ag. 32) present a rather 
different appearance from those in A. oblongus. They are 
in every respect normally developed, and about as long as 
the head, with the peduncle and the Aagellum distinctly 
deAned. Of the joints of the peduncle, the 2 Arst are 
largest,' and furnished at the extremity with a number of 
comparatively long auditory bristles; the last joint, on the 
other hand, is quite small, and has rather the appearance 
of belonging to the Aagellum itself. The latter is of the 
usual structure, about equalling in length the 2 last joints 
16 * 
