164 
MONOGRAPH OF THF 
a rather broad mentum, and liave the two terminal joints of nearly 
equal size. The prothorax is flat, broader than the head, short, 
with dilated sides, the margin being rounded at the anterior 
angles ; whilst the hinder angles are acutely truncate, or rather very 
deeply and nearly semicircularly emarginate, leaving a narrow 
posterior lobe to the prothorax nearly as in the genus Lebia. 
The elytra are oblong-quadrate, with the base rather broader 
than the prothorax, smooth, shining, impressed at the base, and 
of a rather brigliter colour than the rest of the body. The feet 
are rather slender, with the tibise compressed at the tips, the outer 
angle being produced into an acute spine, and the inner angle 
furnished with two calcaria; the tarsi are five-jointed, but the 
fourth joint is very minute. 
Fig. 3 a, lower parts of the mouth in situ; the mandible; 
3 b, maxilla; 3 c, posterior tibia and tarsus. 
Genus.— PAUSS us, Linnoens. 
Corpus oblongum subdepressuni; caput mediocre prothorace angustius ; antennarum clava 
Diaxima formac variabilis saepius irregulariter obtrigona, compressa vel subdepressa basi 
externe in bamum pvoducto. Labrum subcoriaccum parvum transversum auguHs anticis 
rotundatis, Mandibul© cnmesB parvae basi dilatata apicc falcat® acuto dentcquo in medio 
marginis intcrni mcmbranaque coriacea interna basali qiiadrata instrucUe. Maxilla? stipite 
crustaceo (figs. *) processu terrainall (intcrno) tcnuissinio corueo niandibulitbnni, valdo 
arcuato et acute bidentato, spatio iutci'medio membranacco (ct in P. Hcarsiano solum 
inveni rudimentum partis ilia? cornea? in tab. 68, fig. 1. c—1., pugiouo t wotatfo). Pal- 
porum niaxilluriuin iuternorum vestigia nulla detoxi. Palpi maxillarca (cxterni) 
4- ariiculati articulo 2ado maximo stepius ad apiccm interne acute producto, i\Ientum 
(ut videtur) rectangularo trianguliforme (bypothcuusa antico transversa) latcribus 
obliquis capito coalitis, nec basi articiilatuin, angub's anticis laternlibus porrectis et in 
^ dentem subaculum productis. Labrum, os inferno claudens subquadmtum comeum 
subplanmn vel medio longitroi-sum subcarinatum, margine antico intc^ro vcl carinc'c apice 
in dentem parvum ccntialcni producto. Palpi labiales maxillaribus breviores labioqiio 
longiores ad ortum subconuati (sc. interdum in scapum parvum vcl radiculani * inserti 
ut in P. miciocepbalo) labfiquo faciem inferiorem velantes ct margiuem cjus anticum 
ultra extensi, interdum reflexi, 3-articulati articuHs duobiis basalibus brevissimis ultimo 
magiio longe ovato auL cyliudrico, subulate, apice acuto. Prothorax subcylindricus 
vel truncato-cordatus paullo longior quam latior, plerumque quasi in duas partes 
divisus, parte antica plus minusvo elevata. Scutelluoi parvum. Elytra protliorace 
latiora, oblongo-qiiadiata, postice truncata angulis posticis externis tubercuUferis. Pedes 
breves robust! plerumque dilatati ; tibiis quatuor posticis 6a?pius bicalcaiatis. Tarsi 
5- articulati articulo basali stepius minuto. Abdomen 4-articulatum articulis duobus 
intermediis brevissimis. 
In my monograph upon this family, published in the Linnman 
Transactions, I endeavoured, at considerable length, to clear up tho 
confusion existing in the writings of Afzelius, Latreille, and others, 
as to the real structure of tho parts of the mouth. Having at that 
* Is it possible that this scape of the labial palpi can be the real representative of the 
mentum, and that the part I have described as the mentum is in fact part of the skull? 
