74 
MONOGRAPH OF THE COLEOPTEROUS FAMILY PAUSSID.E. 
rotundata instructaj (fig. 1 a). Maxillce parvse lobo-basali crustaceo, processu tcrminali 
vel interne piano acuto cornco valdo compresso mandibuliformi Interne intemo uni- vel 
bi-dentato extemoque stylo tenui exarticulato instructae (fig. 1 e —1 /). Palpi maxil- 
lares magni 4-articulati articulo basali brevi, 2ndo maximo apice interne oblique pro- 
ducto compressoj 3tio subquadrato, 4to tenuiori subovato. breve transversura 
crustaceum, angulis anticis in spinam longam productis, medioque marginis antici sub- 
rotunde porrecto (fig. prox, 1 d). Palpi lahiales breves 3-articulati porrecti vel refleii 
articulo Imo brevi duobus nltimis subsequalibus, Imo crassiori, 3tio tenuiori apice 
acuto. Lahium subquadratnm basi in lobos duos interne connexos (palpos gerentes) 
constructum, t inarginc antico integro, angulis anticis rotundatis. Antenna magn® 
articulis quasi duobus, priori minori compresso, apice oblique marginalo, angulo interiori 
supra product© fere conico; tunc articulus? parvus subglobosus emargiuaturse prioris 
immersus : ciii insidet articulus ultimus maximus subplaniis valde depressus ct inferiori 
subtransverse impositus ; inarginc omni compresso acuto basi truncatus et externe 
incisus vel dentatus : ctiam jnxta basin superne transversim impressus (articulorum 
divisionera referens); ncc basi uncinatus. Thorax planus brevis transversus latior, 
lateribus anticis rotundatis. Elytra thorace multo latiora, postice subtruncata oblongo- 
quadrata depressa angulis posticis externe tuberculo ordinario instructis. Pedes brevi- 
usciili crassi, dilatalis, calcaribus duobus, ad apicem armatis, angulis externis 
apicalibus aciitis. Tarsi breves, 5 articulali, articulis tribus basalibus compressis intus 
pilosis, 4to minutoj; 5toque tenui longiori Isevi cylindrico, unguibus duobus acutis 
instructi. AIcb ut in* Paussis. Abdomen elytris paullo longius, 4-articulatum articulis 
duobus intermediis brevissimis ||. 
The insects of the present genus appear to be intermediate 
between those species of Paussus which have the prothorax not 
strongly constricted across the centre, and the Cerapteri. In their 
biarticulate antennse and the formation of their maxillary palpi, 
they approach the former; and in the general habit of their bodies, 
as well as in the formation of the basal joints of their tarsi, and in 
the tendency to articulation exhibited in the clava of their antennse, 
they approximate to Cerapterus, Platyrhopalus angustus, and the 
two species which, in the Linnman Transactions, I described under 
the names ofPlatyrhopalus ? Imvifrons” and '^Platyrhopalus? 
dentifrons,” (but which I now find, by an examination of their 
trophi, to be species of Paussus,) serve to prove the former relation¬ 
ship, whilst Platyrhopalus Melleii sufficiently attests the latter. 
In a preceding article (pp. 10—12) I have quoted some observa¬ 
tions by Dr. Bux’meister, upon the construction of the wings of 
* In the Linncean Transactions (xvi. 655), and anic p. 5, the joints of the labial palpi 
were described as of equal, or nearly equal, length. The present description is made from a 
very careful recent dissection of P. dcuticornis compared with the other species. 
'h In the specimen of P. denticornis which I dissected fourteen years ago, the basal portion 
of the labium seemed more regularly divided into two scapes, upon which the palpi are in¬ 
serted, than in the specimen of the same insect recently examiiieil. 
J In my paper in the Linnsean Transactions, I overlooked this minute joint, which, how¬ 
ever, I detected in P. ISIellii and Westwoodii, Linn, Trans, xvi, p. 684. and Ent. Trans, ii. 
pi. 10, fig. 4 g, 5 c, 5 d. 
II Air. W. W. Saunders’unique specimen of P. Westwoodii has the appearance of an additional 
basal articulation, which led me to figure the abdomen as 5-jointed in the Entomological 
Transactions. I find, however, the articulation is only apparent, and not real. 
