MONOGRAPH OF THE COLEOPTEROUS FAMILY PAUSSIDA. 77 
that the external outer horny piece in Platyrhopalus, le, Lf; 
1 g, and 1h *, is hollowed out within, being filled with muscle 
below, and having on its inner face above, a small curved horny 
piece {, 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. Burmeister 
describes it ; its use also as a socket or 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 figures 1h, 17, 14, 12.) 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 +, and 
the true mando ; and that his fig. 8a, 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 
‘+, varies in size in the genera of the present family. I find it in 
Paussus to agree in minuteness with Platyrhopalus. In Cerapterus 
Hopi (ante, pl. 50, fig. 5 d +) it is much enlarged, and becomes 
external ; and in Pentaplatarthrus (pl. 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 
we 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. Mellei and aplustrifer receding 
from its general habit, but yet they are not sufficiently distinct to 
warrant me in separating them generically. P. levifrons and 
dentifrons, as mentioned above, must now be removed to the 
genus Paussus. 
Species IL—PLATYRHOPALUS DENTICORNIS. (Plate 68, fig. 1.) 
P. sublatus, rufo-castaneus, elytris dorso fusco; sutura late ad basin, maculaque utrinque 
postica rufo-castaneis, antennarum clava magna latere omni acuto continuo at juxta basin 
externe incisione parva distincto ; thorace antice utrinque rotundato-dilatato. 
i 7 j 5 
Long. corp. lin. 32, ad lin. 5. 
Habitat in India Orientali (Bengalia, &c.) In Museo nostro, &c. 
Syn.— Pausus denticornis, Donov. Epit. Ins. Ind. Pausus, No. 1, tab. 5, fig. 1; Rees 
Entomol. pl. 8, fig. 10 and 10*; sine descript. (nee Gyllenhal). 
Platyrhopalus denticornis, Westwood, in Trans. Linn, Soe. vol. xvi. p. 657, tab. 33, 
fig. 43—48, vol. xix. p, 50; Burmeister, in Guer. Mag. Zool. 1841, Ins. pl. 76, fig. 
2, &c 
ay XC. 
