99 
PLATE LXXIIL 
ON TWO SPECIES OF INCA FROM TROPICAL AMERICA. 
The Goliathideous Cetoniidee being (with a single anomalous 
exception) natives of Africa and India, we may, perhaps, be 
justified in regarding the species of Inca which are natives of 
tropical America* as their natural geographical representatives, 
although they do not belong to the same portion of the family. 
In respect to their maxillae, indeed, they form a decided group, 
having an elongated, cylindrical, toothless galea and.simple mando; 
thus differing from the Trichiides, wdiicli have an obtuse coriaceous 
galea, and from the Euchiridae of Burmeister, which have a den- 
tated galea. This author has very carefully illustrated the struc¬ 
ture of the trophi in Germar's excellent ^ Zeitschrift fur die 
Entomologie’ (ii. tab. 2, f. 5—8, 18). 
INCA SOMMERI, 
Plate 73, fig. 1 ^,3 $. 
I. chalybcEO-niger, supra opacus, pronoto albido vittato et limbato, elytris obscure rufis, albido 
iiToratis; comubus capitis ^ oblique porrecto, apicibus latis oblique truncatis. 
Habitat in Mexico—Yilla alta prope Oaxaca. 
An varietas geographica I. Weberi ? 
Long. corp. ^ (comub. capitis inclus.); unc. 2 ; $ unc. 1^. In Mus. D. Sommer. 
The two insects represented in Nos. 1 and 3 have been very 
obligingly forwarded to me by M. C. Sommer, Esq., of Altona (the 
father-in-law of Professor Burmeister), with the view of their 
being figured in this work, if considered distinct from the Cetonia 
Inca of Weber (Tnca Weberi Encjxl. Meth., and Burm., I. Fabricii 
Perty.) The principal difference between the male of the last- 
named insect and that sent by Mr, Sommer, consists in the form 
of the horns of the head; and as I have found a second specimen, 
agreeing with Mr. Sommer*s, in the British Museum Collection 
(arranged with I. Weberi), I have thought it most advisable to 
give it as distinct from that species, especially as its geographical 
station is widely different from that of I. Weberi, and as the 
distinctions between the other species of the genus is but slight. 
The head and thorax of the male, on the upper side, are 
obscure blue-black. The former has two prismatical horns, 
* The curious occurrence of a species of this group in Africa must not be overlooked. 
See Arc, Ent. 1, pi. 46, f. 6. 
H 2 
