of Lucanoid Coleoptera. 1] 
Rua#tus Westwoopu ¢, Parry (var. max., 9 ignota). (PI. IX. 
figs. 2 & 8.) 
Hexarthrius (?) Westwoodii, Parry, Proc. Ent. Soc. 1862, p. 108. 
R. nigerrimus, nitidus, sublente tenuissime granulosus; mandi- 
bulis elongatis, falcatis, apicem versus parum deflexis, singula- 
riter ad basin excavatis et supra infraque dente magno armatis, 
ante medium dente acuto instructis, apicibus furcatis; capite 
brevissimo, prothorace angustiori, clypeo transverso haud pro- 
minulo, concavo, antice in medio angulato; prothorace trans- 
verso, lateribus sinuatis dente parvo acuto armatis; elytris 
elongatis, subparallelis ; tibiis anticis 4 aut 5-spinosis, inter- 
mediis extus in medio dente acuto armatis, posticis simplicibus. 
Long. corp. unc. 2, lin. 3; mandib. une. 1, lin. 3. 
Hab. Ind. Or., aut Archip. Ind. (?) 
I am indebted to J. C. Bowring, Esq., for the possession of this 
magnificent and unique species. It is one of the largest of the 
Lucanoid Coleoptera, measuring 33 inches. 
Hexarturivus Derrorirr $, Parry (var. max., ¢ ignota). 
(BIS LV: tie? 7.) 
H. niger; mandibulis exsertis, supra et intus denticulatis, ad 
basin singulariter excavatis; capite supra bituberculato ; 
elytris plaga postica castanea. 
Long. corp. fere unc. 2; mandib. lin. 9. 
Hab. Siam. Specimen unicum in Coll. Mniszech. 
Closely allied to H. Parryi, Hope, but of a more elongate and 
slender form. Mandibles straighter, with the interior portion of 
their base deeply excavated. The binodose elevations on the 
head of H. Parryi are replaced by two elevated conical tubercles. 
The prothorax is narrower and longer, with the anterior tuber- 
cular angle more prominent. The apical yellow plaga of the 
elytra does not extend so far towards the base; and the punctua- 
tion of the mandibles, head and prothorax is infinitely stronger ; 
the legs are more slender. 
I am indebted to M. Henri Deyrolle for the characters of this 
species, at present unique in the museum of Count Mniszech, and 
received from Count de Castelnau. 
Hexarturius Cuauporri, H. Deyrolle, MS. 
This new species from Sumatra, allied to H. Rhinoceros, is in 
the collection of Count Mniszech. M. Henri Deyrolle proposes 
to describe it in the Ann. Soc. Ent. Fr. for 1864. 
