Famity—CETONIID. Sus-F4mity—CREMASTOCHEILIDES. 31 
oblongum, prope basin utrinque rotundato-incisum, margine antico fere recto, disco in medio angulato-incrassato 
longe setoso. Prothorax fere cireularis margine antico (pro capitis receptione) paullo emarginato, disco spatiis 
duobus parvis obliquis levibus. Prosternum ante coxas anticas spina parva deflexa armatum (fig. 1¢). Meso- 
sternum minime porrectum obtriangulare; metasterni apice haud prominulo, pro receptione apicis mesosterni 
emarginato. Elytra supra fere plana, impressione profunda sublaterale notata. Abdomen segmentis 4 basalibus 
subtus in medio depressis at non canaliculatis. Tibia antice extus bidentate (fig. 1d). Tarsi 5-articulati 
breves. 
The South African species, upon which I have established this genus, agrees with Scaptobius in size and 
general obscure appearance, but is distinguished at once from it by the form of the prothorax and mentum ; 
from Ceenochilus it differs in its broader form and unidentate galea of the maxillze; from Cymophorus, in its 
obscure appearance, comparatively smooth elytra, and rounded thorax ; and from Oplostomus, in its bidentate 
mando, form of the thorax, and comparatively small mentum. It agrees with Centrognathus in several im- 
portant respects, but differs in its small unarmed head and simple feet. Its nearest ally, however, seems to 
be the Genus Pilinurgus, having nearly similar maxille and mentum, and bidentate anterior tibie. 
Species 1 (50)—TROGODES ROTUNDICOLLIS. 
Prate XI, Fie. 1. 
Oblongo-obovatus, niger, opacus, supra parum convexus, indumento fusco-brunneo obsitus ; capite subtiliter 
crebre punctulato ; prothorace crebre punctato, medio utrinque area parva sub-elevata, levi, notato, lateribus 
posticeque valde rotundato: elytris vage sat crebre aciculato-punctatis, singulo, in disco, leviter biimpresso. 
Long. corp. lin. 5 (9-10 mill.) ; lat. lin. 2} (47-5 mill.) 
Habitat ; Caffraria tota. In Mus. Hopeiano Oxonix, Reg. Holm. &e. 
Syn.: Trogodes rotundicollis. Westw. MS; Schaum, Verz. Lam. Melit. p. 64; Boheman, Ins. Caffr. pars ii. 
P- 54- 
This insect has somewhat the appearance of a small depressed Trox (whence the generic name). The head 
and prothorax are variolose-punctate, each puncture producing a minute luteous bristle; the elytra have 
elongate punctures of the same character. The abdomen beneath in one sex is convex, but in the other the four 
basal segments in the middle are flattened, but not channelled. In this sex the legs are rather longer, and the 
spines of the fore tibiw and the spurs of the four hind tibie are not so strong as in the female; the pygi- 
dium has a longitudinal carina at its base, more strongly defined than in the female, and the elytra have several 
obscurely defined abbreviated cost on the dise and towards the lateral margin. 
Genus 17—PILINURGUS. 
(Burmeister, Handb. ili. 1842, p. 658 ; Myoderma, Dejean Cat. (pars).) 
Corpus parvum obscurum hirtum, tomentosum, Antennarum articulus basalis mediocris. Clypeus parvus 
margine antico integro elevato. Mandibule parte externa cornea, apice acuto. Maxille (pl. IX, fig. 22) 
mediocres, galea brevi curvata apice subobtuso; mandone porrecto dentibus duobus obtusis, antico porrecto. 
Mentum oblongum, antice paullo latius, ante medium angulato-elevatum (fig. 2, subtus ; 2c, e latere visum) antice 
oblique truncatum, disco truncaturee subeconcavo margine antico integro. BRrothorax subhexagonus, margine 
postico elytris angustiorl, haud emarginato. Elytra prothorace latiora absque costis vel sulcis impressis. Pro- 
sternum spina deflexa antica armatum. Mesosterni processus anticus abbreviatus obtuse-rotundatus, coxas non 
superans (fig. 27). Tibize anticze apice extus bidentatz (fig. 2). Spiracula duo postica tuberculiformia. 
The small size of the species of this African genus, and the tomentose covering of their upper surface, 
without any of the deep sulci or raised curved cost of the elytra, will distinguish them from their nearest allies. 
I have here added a second species to this genus, closely allied to the type P. Airtus ; as well as a third species 
from the East, which seems most fitly to be placed here, unless it should be considered more advisable to form 
it into a separate genus, which seems scarcely necessary. 
