124 
hvoraf do 2 yderste foruden de saedvanlige Haarborster er 
forsynede mod nogle faa (3) Sandsevedhseng af den sa>d- 
vanlige smale, linesere Form. Hos N. obtongus reprsesen- 
teres derimod hele Svoben af et enkelt enormt udviklet 
kolbeformigt Sandsevedhaeng. 
2 dot Par Folere (Fig. 33) er omtrent dobbelt saa 
lange som lste Par og ialmindelighed vinkelformigt boiede, 
med Endepartiet bagudrettet. Af Skaftets 5 Led iidmmrker 
det 2det sig derved, at det paa den vdre Side gaar ud i 
et stffirkt, udadrettet, tornforinigt Fremspring. lste og 3die 
Led er ganske korte,' hvorimod do 2 sidste er mere for- 
lamgede. Svoben er traadformig, noget kortere end Skaftet 
og sammensat af 13 med simple Bsfrster besatte Led. 
Overlseben (Fig. 34) danner en liden afrundet, lige- 
som af 2 Segmenter bestaaende Lap, der er bevsegeligt 
forbnndet med Epistomet. 
Underlmben (Fig. 35) bar 2 ganske korte, i sin indre 
Kant cilierede Endelapper. 
Kindbakkerne (Fig. 36) riser den for Familien ssed- 
vanlige Bygning. Det forreste tandede Parti liar tmt bag 
Spidsen en Gruppe af stive Burster og er ved et dybt 
vinkelformigt Indsnit skilt fra Tyggeknuden; denne har 
Formen af en cylindrisk, nsesten under en ret Yinkel fra 
Corpus udgaaende Fortsats, der i Enden er noget skraat 
afkuttet og her forsynet med den siedvanlige riflede Skulp- 
tur. Palpen er vel udviklet, omtrent af selve Kindbakkens 
Lamgde og bestaaende af 3 tydeligo Led, hvoraf det mid- 
•terste er lmngst. Endeleddet er stasrkt krummet og langs 
sin indre Kant forsynet mod en Rad af cilierede Turner. 
\ ed Enden af 2det Led sees en Gruppe ligncnde Torner 
eller Borster; forovrigt er Palpen ganske nogen. 
lste Par Kj fever (Fig. 37) er af stedvanligt Udseende. 
Den indre Tyggelap er ganske smal og noget bugtet; de 
paa samme faestede Borster meget smaa. 
2det Par Kj sever (Fig. 38) liar de 2 ydre fingerfor- 
mige Fortsatser meget smale og ved Spidsen jforsynede med 
3 tynde Borster. 
Kjmvefodderne (Fig. 39) udmaorker sig i hoi Grad ved 
den ussedvanlige Udvikling at Tyggelappen, der er betydelig 
storre end solve Basaldelen og af aflang 4-sidet Form, med 
det indre Hjorne udtrukket til et skarpt tandformigt Frem- 
spring. Derimod er Palpen ualmindelig smal og simpelt 
cylindrisk, forovrigt sammensat af det normale Antal Led. 
Af disse er det 2det lmngst og ligesom de folgende ved 
Spidsen forsynet med nogle faa simple Borster. Den plade- 
formigo Epignath er stserkt udviklet, af uregekmessig tre- 
sidet Form og rsekker med sin stumpe Spids omtrent til 
Enden af Palpens 3die Led. 
of the peduncle taken together, and consisting of 4 distinctly 
defined joints, of which the 2 outermost, apart from the 
usual auditory bristles, are furnished with a few (3) sensory 
appendices, of the normal slender, linear form. In A r . ob- 
longus, on the other hand, the whole flagellum is represented 
by a single, prodigiously developed, cucubiter-shaped sensory 
appendix. 
The 2nd pair of antenme (fig. 33) are about twice 
as long as the 1st pair, and, as a rule, angularly bent, 
with the terminal part directed backward. Of the 5 joints 
of the peduncle, the 2nd is distinguished by its jutting forth 
on the outer side as a strong, outward-directed, spiniform 
projection. The 1st and 3rd joints are quite short, whereas 
the 2 last occur more produced. The flagellum is fili- 
form, somewhat shorter than the peduncle, and composed 
of 13 articulations, beset with simple bristles. 
The labrum (fig. 34) forms a small rounded lobe, 
consisting, as it were, of 2 segments, and movably con- 
nected with the epistome. 
The labium (fig. 85) has 2 very short terminal lobes, 
ciliated along the inner margin. 
The mandibles (fig. 36) exhibit the structure charac- 
teristic of the family. The anterior dentate part has in 
immediate proximity to the point a group of stiff bristles, 
and is, by a deep angular incision, cut off from the molar 
protuberance; the latter presents the form of a cylindric 
projection, jutting forth almost at right angles with the 
corpus, the said projection being somewhat obliquely truncate 
at the extremity and furnished there with the usual fluted 
sculpturing. The palp is well developed, about equal in 
length to the mandible itself, and composed of 3 distinct 
articulations, of which the middle one is longest. The 
terminal articulation very considerably curved, and furnished, 
along its inner margin, with a series of ciliated spines. At 
the extremity of the 2nd articulation occurs a group of 
similar spines or bristles; for the rest, the palp is entirely 
naked. 
The 1st pair of maxillae (fig. 37) has the usual ap- 
pearance. The inner masticatory lobe is quite slender, and 
somewhat sinuous; the bristles attached to the lobe are 
exceedingly small. 
The 2nd pair of maxillae (fig. 38) have the 2 outer 
dactyliform projections exceedingly slender, and furnished 
at the point with 3 delicate bristles. 
The maxillipeds (fig. 39) are very prominently char- 
acterized by the unusual development of the masticatory 
lobe, which is considerably larger than the basal part it- 
self, and of an oblong, quadrilateral form, with the inner 
corner drawn out to a sharp, dentiform projection. The 
palp, on the other hand, is remarkably slender and simple- 
cylindric, but has, for the rest, the normal number of 
articulations. The longest of these is the 2nd, which, like 
the succeeding, is furnished at the point with a few simple 
bristles. The lamelliform epignath is very fully developed, 
of an irregular-triangled form, and reaching with its obtuse 
point about to the extremity of the 3rd articulation of the 
palp. 
