MONOGRAPH OP THE COLEOPTEROUS FAMILY PAUSSID^. 77 
that the external outer horny piece in Platyrhopalus, 1 e, \ f, 
1 g, and 1 A *, is hollowed out Avithin, being filled with muscle 
below, and having on its inner face above, a small curved horny 
piece f, which is Dr. Burmeister’s petit appendice caputiliforme, 
which is, however, shown in my fig. 1 g, to have no connexion with 
the basal^ joint of the maxillary palpi as Dr. Bnrmeister 
describes it i its use also as a socket oi* fulcrum for the alternate 
elevation and depression of the hooked mando, appears to me to be 
altogether gratuitous ; as, although I endeavoured to move it in all 
directions (see figm-es 1 h, 1 i, 1 k, 1 /,) I could not find that it even 
possessed an independent movement. Indeed, I believe Dr. Bur¬ 
meister’s figure 10 is composed of this small corneous piece f, and 
the true mando; and that his fig. 8 a, and the left-hand portion of 
his figure 10, are the same organs seen in different positions, and 
that they have no distinct existence in nature. This small piece 
t, varies in size in the genera of the present family. I find it in 
Paussus to agree in minuteness with Platyrhopalus. In Cerapterus 
Hopii (ante, pi. 50, fig. 5 c? f) it is much enlarged, and becomes 
external; and in Pentaplatarthrus (pi. 58, fig. 2 c) it is very large, 
assuming the place of the basal part *. The minute exarticulated 
style appears to be restricted to this genus, it having been only- 
found in P. denticornis and Melleii. It is to Dr. Burmeister that 
Ave are indebted for pointing out its analogy with the labial palpi 
of the Carabideous insects. 
The four species represented in the accompanying plate are more 
especially typical of the group ; P. Melleii and aplustrifer receding 
from its general habit, but yet they are not sufficiently- distinct to 
w-arrant me in separating them generically. P. Isevifrons and 
dentifrons, as mentioned above, must now be removed to the 
genus Paussus. 
Species I_PLATYRHOPALUS DENTICORNIS. (Plate 68, fig. I.) 
P. sublatus, rufo-castaneus, elytris dorso fusoo; sutnra late ad basin, maculaque utrinque 
postica rufo-caslaneis, antennartim clava niagna latere omni acuto continuo at jnxta basin 
e.xterne incisione parva distincto ; thorace antice utrinque rotundato-dilatato. 
Long. corp. lin. SJ, ad lin. 5. 
Habitat in India Oricntali (Bengalia, &c.) In Mus®o nostro, &c. 
Syn.— Pausus denticornis^ Donov. Epit. Ins. Ind. Pausus, No. 1, tab. 5, fig. I ; Rees 
Entomol. pi, 8, fig. 10 and lO* ; sine descript. (nec Gyllenhal). 
Platyrhopalus denticornis^ Westwood, in Trans. Linn. Soc. vol, xvi. p. 657, tab. 33, 
fig. 43—48, vol. xix. p, 50; Burmeister, in Guer. Mag. Zool. 1841, Tns. pi. 76, fig. 
