BY THE REV. T. BLACKBURN. 
1323 
Philochlcenia. The authors just named applied this name to 
another Australian species 'also appertaining probably to Caulohius ), 
and it has since been adopted by M. Blanchard for an American 
genus. 
Sericesthis was a name applied by Dr. Boisduval (Voy. de 
I’Astrolabe), — but without any generic definition, — to insects of 
several genera, among which I doubt there having been a true 
Jleteronyx ; and probably M. Lacordaire considered it to include 
part of Heteronyx only through a confusion between that genus 
and Caulohius. 
Caulohius, Le Guillou (Rev. Zool. 1844). I have not seen the 
original diagnosis of this genus, but the insect for which it was 
proposed is stated by M. Lacordaire to be identical with Silopa 
pnihescens, Er., which again M. Lacordaire asserts to have per- 
fectly simple claws ; in that case I think it should be excluded 
from Heteronyx. If M. Lacordaire’s assertion regarding S. 
pubescens, Er,, is correct, it is clear that Erichsen attributed his 
puhescens to Silopa (which he characterizes as possessing bifid 
claws) in error, and then Le Guillou’s name must be accepted for 
it. M. Lacordaire considers Caulohius a synonym of Heteronyx, 
while Dr. Burmeister places it not even in the same yroup of 
genera. 1 have several species before me which 1 believe to be 
congeneric with Caulohius villosus, Le G., and am of opinion that 
Dr. Burmeister is right. At all events the name Caulohius must 
not be treated as congeneric with Heteronyx, as there is no doubt 
of the simplicity of the claws in the species attributed to it. 
Haplopsis, Blanch., is a synonym of Heteronyx, accoi’ding to M. 
Lacordaire, but it has simple claws, and presents other differences ; 
I regard it as a good genus. 
Hostilina is distinguished from Heteronyx by M. Blanchard, on 
the shape of its labium ; and the genus is doubtfully accepted by 
M. Lacordaire. I find the labium so extremely subject to variety 
in Heteronyx, tliat 1 have no hesitation in rejecting the name, 
although I have not seen the original s{)ecie8, which M. Lacordaire 
characterizes as having all the ajjjiearance of a Heteronyx. 
