Vol. VIII, No. 10.]  Indo-Australian Passalidae. 405 
[N.S.] 
metry is often almost greater than that of the marginal pro- 
cesses between them. In addition to these genera a new genus 
Tiberioides, more closely allied to Episphenus than to any other 
and differing from it only in having the frontal horns closer 
together, must be established here for two Assamese forms 
hitherto known respectively as Tiberius kuwerti (=cancrus, auct.) 
and Chilomazus borealis; and the monospecific Malaysian genus 
Ophrygonius, Zang, must be mentioned as apparently allied 
tum of Chilomazus appear to me, however, to be homologous 
with the depressions of the middle of the anterior margin of the 
mentum found in the genera Basilianus and Ophrygonius and 
in certain species of Aceraius rather than wi th true lateral scars ; 
and this view is supported by the close general resemblance of 
the insect to Episphenus on the one hand and in a less degree 
to Basilianus on the other, and also by zoogeographical con- 
siderations. The place assigned by Kuwert to Epilaches® filtus 
may be criticized in the same way ; and I have little doubt that 
this species is based on a slightly abnormal specimen of Basili- 
third of the second section of the ily) includes only the 
genera Macrolinus and Tiberius from the former of which it 
takes it e. T wo genera differ from all others of this 
orbital ridges lie between the ends of the curved transverse 
ridge at the back of the head instead of being continuous with 


1 ** Chilomazus’’ puerilis cann } ! 
scheme of classification from characters referred to in descriptions, and 
I have not seen a specimen. As it comes from the Aru Islands, however, 
Acer equently itis probable that it will have to be removed 
from the genus Chilomazus and placed ewhere in the Gnaphalocnemi- 
ae is case the gen hilomazus is @ tly confined to Ceylo 
2 Zang has pointed out that Kuwert’s hirsutus and ceylonicus ave 
identical and that his record of specimens from Ceylon must be incorrect. 
8 See above, p. 404 footnote, concerning the confusion between the 
generic names Analaches and Epilaches. 
