ASIATIC CETONTIDiE. 
117 
In all the following groups we find the pronotum widest behind, 
or, at least, with the hind part not narrower than the middle, 
accompanied by the simple structure of the outer lobe of the 
maxillae. 
JUMNOS, Saunders. 
This genus was proposed in the Transactions of the Entomological 
Society of London, (vol. ii., p. 176, pL 16, fig. 1.) for the reception 
of a splendid male insect from the East Indies, Jumnos Ruckeri, 
characterised by the following peculiarities: The head square in 
front, and not cornuted, with the lateral margins tuberculated; the 
pronotum broad and very gibbous in front, the lateral margins 
beyond the middle nearly parallel; mesosternum porrected and 
oval; the fore legs very long and externally bidentate, and with the 
internal margin deflexed and denticulated; the fore tarsi long, 
with a brush of hairs on the underside of the terminal joint at 
the tip. 
The female of a second species was described by the Rev. F. W. 
Hope, in Professor Royle’s work on the Botany, &c., of the 
Himalayas, under the name of Cetonia Roylii , (Insects, pi. 1, fig. 1,). 
I am indebted to A. Melly, Esq., for the male of .this species, 
which proves to be very closely allied to J. Ruckeri, as will be seen 
on comparing my plate 29, fig. 2, with Mr. Saunders's figure. The 
head of the female, (fig. 2 a ,) like that of the male, is unarmed, with 
the clypeus nearly truncate in front; the maxilla of the male 
(fig. 2 rf), has the inner lobe nearly simple, but in the female it is 
armed with a sharp hook (fig. 2 b) ; the mesosternum (fig. 2 e and 
2jf), is much less produced than in J. Ruckeri, and is much broader 
than long, with the front margin rounded. The fore legs of the 
male are moderately long, and both internally and externally 
toothed and serrated, as in J. Ruckeri, except that they want the 
brush of hairs on the underside of the last joint of the tarsi. The 
fore tibice of the female (pi. 29, fig. 2 c), are also externally biden¬ 
tate, but they are simple on the inside. The four hind tibiae are 
slightly spurred beyond the middle in the male, and strongly in the 
female, they are thickly clothed within with fulvous liaiis. 
RHOMBORHINA, Hope (Col. Man. 1, p. 120*). 
In the unarmed quadrate form of the clypeus of both sexes, and 
the bidentate tibiae of the females, this genus approaches Jumnos, but 
* Mr. MacLcav (Get. So. Africa, p. 30), has ingeniously transposed Mr Hope’s types of 
his two geuera, giving Hardwickii ns the type of Rhomborlnna and Opalina as that ot 
Trigonophora (as he misterms it). 
