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4 8 O E D E E — C O L E O P T E R A . S E C T I O N — P E N T A M E R A . F A M I L Y — C E T O N I I D / E . S U B - F A M I L Y — C R E M A S T O C H E I L I D E S . 4 9
sideways ; and 6,/', the anterior tnuieated and concave extremity of the nientum seen f rom the front). The prothorax
is nearly circular, convex, with sharp lateral margins, very finely and closely pnnetiired, the widest portion hcing
across the centre, the hind margin being only as wide as the anterior, the posterior margins rounded off, and the
hind margin nearly straight; on the disc is a straight longitudinal impressed line down the middle. The
scuteUum is marked with small eieatricose punctures, some portions in the centre being left plain. The elytra
are about twice the length of the prothorax, and about one-third wider ; they have several slight costai ou the
disc, and two stria), formed of concatenated eieatricose punctures (fig. 6 i, central part of elytron) ; they are
covered with small semi-oval punctures. The pygidium is convex, and delicately granulose ; the three posterior
pairs of spiracles are prominent, especially the last pair. The legs are short and thick ; the tarsi thick at the
base, and gradually becoming more slender to the tips ; the anterior tibia; are obtusely bidentate at the tips, the
posterior having a slight angular production in the middle of the outer edge (fig. Qg, anterior foot; 6/i, hind
foot). The abdomen is convex.
GENUS 20—GENXJCTITJS. Kirby.
(Trans. Linn. Soc. xiv. p. 569.)
Corpus oblongum, subdepressum. Clypens deflexus, apice refiexo emarginato ; vertex fovea magna impressus.
Maxilla; medioeres ; galea longa curvata falciformi, apice acuto integro ; mandonis apice in dentem
minorem apice etiam acuto integro. Mentum (labium, K.) quasi pedimeulo elevatuin, elongato-snbtriangulare
angulis rotnndatis ; cum clypeo os exactissime daudens, disco postico in comu obtuso obUque deflexo sub jugulum
dependente, produeto ; palpis lateraliter insertis, vix ultra marginem anticum menti extensis. Antenna; articnlo
primo magno incrassato arcuato. Prothorax subrotundus antice emarginatus. Prosternum ante coxas antieas
spina parva armatum. ìlesostermmi inter pedes intermedios parvum mucronatum. Elytra oblonga parallela.
Tibia; antica; extus 3-dentatiE, postica; in medio extus spina armata;. Tarsi 5-articulati.
The species of this genns are small in size, oblong, depressed, with the sides of the elytra parallel. They
are natives of Africa, and the typical species is subject to considerable variation in the colour of the prothorax
and elytra, which are either entirely black or variously marked with red spots.
SPECIES 1 (71)—GENUCHUS HOTTENTOTTUS.
Augustus, niger nitidns ; supra acienlato-striolatus ; clypeo brevi sinuato, antice refiexo ; vertice integro
inermi; prothoraee rotundato disco subirvi band canalieulato ; scapulis pleuris elytrommciue tuberculis
apicalibus fasciculato-pilosis ; elytris apice rotnndatis ; pygidio convexo, transverse carinato, guttis duabus fulvis
transversis notato.
Long. corp. lin. 4.
Habitat ; Cape of Good Hope. In Mus. Hopeiano Oxonia;, &c.
Svs-. : Oetonia Iwttentotta. Fabriclus, Syst. Ent. p. 52 ; Syst. Eleuth. ii. p. 159 ; Ent. Syst. t. ii. 153, 96 ; Gory et
Perch. Mon. Cet. p. 14, pi. XVI, fig. i ; Olivier, Ent. i. 6, p. 56, pi. VII, fig. 55 ; Burmeister, Handb. iii.
p. 658 ; Schanm, Ann. Soo. Ent. Erance, 1845, p. 53.
VAE. : Genuchus wuentus. Eabridns, Mant. Inst. i. p. 32 ; Gory et Perch. Mon. Cet. p. 15, pi. XVI, fig. 3 ; Olivier,
Ent. i. 6, p. 57, pi. VII, fig. 58, et var. pi. VI, fig. 37 ; Schaum, Gerniar Zeitschr. iii. p. . 66 ; Schiinherr,
Syn. Ins. iii. 143, 158.
Capite pronoto, elytris et corpore subtus nigris nitidis, prothoraee maculia duabua lateralibus
posticis, plagisque duabuis curyatis in medio elytrorum abdomineque supra sanguineis.
Habitat ; Senegal (Gory et Perch.).
VAB. : Genv.dms sanguinolentus. MacLeay, 111. Zool. S. Af r . iii. p. 18.
Niger, pronoti maculis duabus posticis, elytris pygidiocpe tote sanguineis.
Habitat ; Cape of Good Hope.
SPECIES 2 (72)—GENUCHUS ELONGATULUS.
PLATE X, FIG. 1.
Oblongns, fusco-niger nitidus, valde punctatus ; vertice bitnberculato (fig. 1 a ) ; antennis rufis; clypeo
antice parum refiexo ; prothorace rotundato, latitudine longitudinem panllo excedente, linea imprcssa media
longitudinali snlcisque duobus brevibns ante medium disci impresso ; elytris oblongis parallelis striatis et forfa;
punetatis; seapuUs, pleuris, elytrorumque tuberculis apiealibus albido-tomentosis; mento transverse striolato, basin
maxillarnm hand tegenti (fig. 1 ¿); tibiis anticis obtuse tridentatis.
Long. corp. lin. 5.
Habitat; Cape of Good Hope (Gory et Peroh.), Senegambia (Burmeister, an recte?).
SYN.: Genuchus elomjatulus. Gory et Perch. Mon. Get. p. 116, pi. XVI, fig. 4; Burmeister, Handb. iii. p. 669,
and p. 829 (C. elongatus); Scliaum, Germar Zeitschr. iii. p. 267,
This species is rather narrower than G. hottenioUns, difiiering from it in the bituberculated vertex, the
less elevated fore margin of the clypens, and the longitudinally channelled pronotum.
SPECIES 3 (73)—GENUCHUS NIGRICLAVIS.
PLATE X, FIG. 3.
Niger, nitidissimns; elongatus, subparallelus; rude irregulariteT punctatus: capitis facie transverse^ late
iinpressa, marginis antici angulis lateralibus prominulis, medio in cornu obtuso elevato, marginis postici carinam
inter oeulos formaute; prothorace antice subdeclivi, linea longitudinali media imprcssa notato et utrinque
parum impresso ; elytris longitudinaliter sulcatis et striatis, singulo in medio macula parva ovali lunulaque
apieali albidis signato.
Long. corp. lin. 6 ; lat. elytr. lin. 2i.
H a b i t a t ; Port Natal et Caffraria, regio fiuvii Gariepia. In Mus. Brit, et D. Parry.
SYN. : Gmuclms nicjridavis. Westw. MS; Schaum, Verz. Lam. Melit. p. 63 ; Bolieman, Ins. Caffr. pars ii. p. 51.
The head is about half the width of the centre of the prothorax; it is closely punctured ; the middle of the
face between the eyes is moderately transversely impressed, the anterior margin of the impression being subtridentate,
the lateral angles are rather prominent, whilst the centre is more triangularly porreeted into an
obtuse tooth, the upper or posterior margin of the impression forming a slightly prominent transverse ridge.
From the central tooth to the anterior margin of the clyiieus the latter is longitudinally elevated, but not
acutely ridged (fig. 3 a, bead seen from the front). The antenna; are entirely black. The maxilla; (fig. 3 b) are
armed with a strong curved apical tooth, and the lower lobe is terminated by a shorter irregular tooth. The
mentum, seen from beneath, is urn-shaped, and very convex (fig. 3 c); the lower extremity terminating in a
prominent obtuse defiexed lobe (fig. 3 d, seen sideways). The prothorax is large, rather shorter than wide, with
the anterior and posterior angles rounded oif, the anterior portion slightly narrower than the hinder ; the middle
of the anterior margin is slightly obliquely truncate, and there is a rather deep longitudinal hnpression down
the middle of the prothorax; the iqiper surface of which is finely polished and irregularly impressed with deep
moderate-sized punctures. The anterior margin of the prosternum is armed vrith a strong compressed spine.
The elytra are oblong, with the shoulders prominent (having a slight impression within each shoulder), and the
sutural portion towards the base being depressed; between the suture and the middle of the disc each elytron is
marked with five fine stria>, formed of confluent punctures, with an oval whitish spot between the fourth and
fifth of these stria; on each elytron near the middle; the space between the second and third stria; (counting
from the suture) is longitudinally elevated into a carina, and the apex of each elytron is marked with a whitish
lunule. The legs are short and strong, the anterior tibia; being armed on the outer edge with three small equidistant
teeth. The four hind tibia; are armed with a small central spine. The body beneath is black and
glossy, and marked with mdely scattered punctures. In the male specimen delineated, the basal segments of
the abdomen have a central depression. The pygidium is sometimes marked with two whitish spots.
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