CORNUTED CETONIID 4. 3 
fourth genus Gymnetinus [Gymnetis], which he distinguishes from 
his genus Cetoninus, merely by having the middle of the thorax 
produced behind into a lobe that conceals the scutellum in a greater 
or less degree. This, however, appears to me to be far too trivial 
a character to separate species which agree in other important re- 
spects, especially as we find that the form of the hind margin of the 
thorax is liable to several variations even in Goliathus, sub-gene- 
rically restricted as it is by Mr. Mac Leay, The characters which 
Mr. Mac Leay gives of the sub-genus which he forms for this 
insect, namely, ‘‘ Maxille armed with corneous teeth, scutellum 
distinct, male clypeus porrect and bifid at the apex, female clypeus 
quadrate, entire,” are in effect as applicable to Goliathus as they are 
to Philistina, the sub-generic name given by Mr. Mac Leay to this 
species, but which must be changed, in favour of that of Mycteristes 
of Laporte—Hist. Nat. An. Art. vol. 2. p. 162. 
It is further requisite to observe that my dissections have been 
made with the greatest care, inasmuch as they materially differ 
from Mr. Mac Leay’s description. This gentleman observes, that 
this group differs from Goliathus, which he places in his genus 
Cetoninus, ‘‘in the long corneous part of the mandibles, in the 
maxillze being armed with corneous teeth, in the mentum being very 
slightly emarginate ” (p. 25), in the thorax being cornuted (p. 31), 
and other particulars. In the specimen of G. rhinophyllus which 
I dissected however, I found the lanceolate part of the mandibles 
(fig. 3 a) not more than one-fourth longer, instead of being “ twice 
as long as the square membranaceous part.” The maxillee (fig. 3 b) 
are rather long and slender, instead of being short and prismatic, 
the apical lobe being armed with at least five teeth. Moreover 
this character of the toothing of the maxilla, which is so rare 
amongst the Cetoniide, exists in a remarkable degree in the typical 
Goliathi, as I discovered in making the dissections for Mr. Hope’s 
Coleopterist’s Manual, but not in Macronata, nor Gymnetis. Mr. 
Mac Leay further describes the mentumas “ quadrate, truncated 
in front, and very little emarginate,” a description which ill accords 
with my figure 3 c. The mesosternum (fig. 3 d), as Mr. Mae Leay 
says, is not produced, that is porrected anteriorly, but it is pro- 
duced downwards, extending lower than the front of the meta- 
sternum. 
The specimen figured in the plate enriches the collection of the 
Rey. F. W. Hope, and isa male. The female differs in having the 
front of the head square and unarmed ; the front of the thorax is 
B 2 
