628 Mr. 5. 0. Westwood on the Paussidce, 
the Entomologia Systematica 1792, deviating from his general 
plan of adopting well-defined genera established by other au- 
thors, inserted the P. microcephalies of Linnaeus and the P. linea- 
tus alone of Thunberg in his genus Cerocoma, observing upon 
the former species, “ ad ulteriorem examinationem hie insero 
insectum singulare, proprium genus uti videtur constituens, 
mihi haud rith notum." To these two species a third was 
added, named ruficollis. Afzelius is the next author who has 
tieated upon the genus, and whose elaborate paper in the 4th 
volume of the Transactions of the Linnean Society, published 
in 1798, deserves the study of every naturalist. Leaving no 
part of his available materials to be elucidated by future ento- 
mologists, his remarks (from the advantages which, as a prac- 
tical collector, as one of the pupils of Linnaeus, and as a pro- 
found naturalist, he possessed,) are entitled to the greatest con- 
sideration. This author deemed it proper, with Thunberg, to 
alter the generic name Paussus into Pausus, in consequence of 
Linnaeus's supposed derivation of the name from “ Pausa ” and 
in which respect he has been followed by many entomologists. 
Latreille and Fabricius, however, preserved (with great pro- 
priety according to my views of entomological nomenclature) 
the name as originally spelt by Linnaeus. In addition to the 
very extended generic characters, to numerous interesting obser- 
vations upon its affinities, &c., as well as to the more detailed 
specific description of the Linmean species, he added the de- 
scription of a new species, which he named sphcerocerus, refer- 
nng also to the lineatus and ruber of Thunberg, and the ruficollis 
of rabiicius, making together five species. 
Donovan, in his splendid Natural History of the Insects of 
India, described and figured not less than four new species 
belonging to the family, and placed by him in this genus ; 
namely, Pa, mm denticornh Don. (Platyrhopalm denticornis 
mihi) ; 
