178 
MODERN SYSTEM. 
Genus 117. EUPLECTUS. Kirby, MSS. Leach, Zool. Mac, yol. «»• 
Antenna: with the first and second joint thick : maxillary palpi wit 1 1 1 
last joint conical. 
Sp. 1. Eup. Reichcnbachii. Leach. 
Inhabits . Taken in Norfolk by Mr. J. Curtis. 
Stikps 2. — Body short and convex. 
A. Maxillary palpi with the last joint securiform . 
Genus 118. BYTHINTJS. Leach. Pselaphus, Family II. Eeichen- 
bach. 
Antenna with the first joint round and considerably larger than the se- 
cond, which is but a little increased, of the male internally acute v 
produced; the third and succeeding to the eighth joint round and o 
an equal size, ninth and tenth larger, eleventh oval, the last acute • 
maxillary palpi with the first articulation filiform, increasing toward 
the apex; second oval, third securiform, the base with a large angle- 
Sp. 1. By lb. Cnrtisii. 
Inhabits sand-pits. 
Genus 119. ARCOPAGUS. Leac.h. 
Antemue with the first and second joint increasing; the first elongated, 
the second round; the third and following to the eighth nearly g'°' 
bose; ninth increasing, nearly globose and lenticular; the tent > 
larger; the eleventh and remainder increasing, oval, the apex of tn 
last joint acuminated : maxillary palpi with the first joint filifornt 
gradually increasing to a club; the second elongate-oval; the tlui 
oval securiform, base angular. 
* Antennte with the first joint cylindrical. 
Sp. 1. Arc. glabricollis. Leach. Pselaphus grabricollis. Reich. 
Inhabits woods, under moss. 
** Antenna with the first joint internally dilated. 
Sp. 2. Arc. bulbifer. Leach. Pselaphus bulbifer. Reich. 
Inhabits Norfolk. Messrs. Sims and Jos. Hooker. 
Genus 120. TYCHUS. Leach. 
Antenna, with the first and second joint enlarged and nearly round, tit 
first a little more lengthened and thicker than the second; third a>‘ 
following to the eighth nearly globose; third and fourth a htt 
longer than the fifth, which is somewhat larger ; ninth and ten 
globose, increasing, and lenticular, the tenth larger than the nint > 
the eleventh with the others gradually increasing. 
Sp. 1. Tych. niger. 
Inhabits ? Taken near London and Bristol, as well as m the 
nity of Norwich. 
