ASLATIC CETONIID. 121 
respect consisting in the shape of the hinder horn of the head. 
Here, however, we also find a curious distinction ; for this horn in 
the female of Tr. Delessertii is of the same acute shape as in the 
males of the two other species; the hind tibize of the males have 
the spur beyond the middle of the limb more distinct than in the 
Trigonophore. Another distinguishing character, separating these 
insects from the last-named genus, is the narrow elongated form of 
the mesosternal process. As there are now several species known 
agreeing together, I have retained the generic name. ‘The maxillee 
offer the same sexual distinction which has been already noticed 
in some of the preceding groups. The mentum is broad and very 
deeply incised in the front. 
Species 1.—Trigonophorus Nepalensis. (Plate 29, fig.3 34.) 
Syn.—Cetonia Nepalensis, Hope, in op. sup. cit. 2g. 
Cetonia Hardwickii, Hope, in op. sup. cit 2. 
Gnathocera Hardwich, Gory and Perch. Mon. Cet. Pl. 19, fig. 1 9. 
Cetoninus (Coryphe, Rhomborhina, 1,) Hardwickii, MacLeay. Cet. Soc. 
Afr. p. 30. 
This handsome insect has the posterior horn of the head acutely 
triangular in the males, but oblong and truncate at the tip in the 
females. The species is liable to considerable variation in colour on 
the upper surface, the female being sometimes (as figured by Gory 
and Perchéron) black or zeneous black, and sometimes of the same 
dark green colour as the male represented in my figure 3. The 
rich orange colour of the femora and tibize (except at the tips), and 
of the posterior coxe, is a very distinguishing character of the 
species. Plate 29, fig. 3 a,represents the head of the female from 
above, and 3 d seen sideways ; 3 c, the maxilla of the male, and 3 d, 
that of the female; 3 e, the mandible; 3 f, the mentum; 3 g, the 
fore tibize of the female ; 3 h, the mesosternum seen sideways ; and 
3 z, the same seen from beneath. As usual in such cases, the specific 
name which had been applied to the male insect is here retained. 
Species ? II.— Trigonophorus Cantori. 
Syn.—Rhomborhina 2 Cantori. Hope in Trans. Ent. Soe. Lond. vol. 3, p. 63. 
Having examined the typical specimen described by Mr. Hope, 
I am able to state that the front of the head is mutilated and 
covered with dirt, and that there is therefore no longer reason for 
doubting that the frontal horn was present, and of the same form 
as in the other species of the genus. In other respects (except in 
being broader) it agrees with the female of Tr. Nepalensis, from 
which I do not consider it to be specifically distinct. Mr. Hope 
has not mentioned the rich orange colour of the posterior coxe, 
and which are visible beyond the sides of the elytra. 
