1943] 
New Stag Beetles 
39 
the female P. subaeneus Motsch., used throughout in compari- 
son). Head transverse, broader than long, with a triangular 
depression, deeper in the frontal angles, extending from the 
clypeal ridge to occiput; anteocular bosses higher and nar- 
rower. Pronotum similar in outline to subaeneus, distinctly 
broader than the base of elytra, with a blackish crescent-shaped 
macula in posterior angles. Scutellum dark. Elytra one and 
one-half times as long as wide, diverging to basal third, parallel 
in median third, thence broadly rounded, base of elytra strongly 
depressed in ante-humeral area, apical margin distinctly di- 
aphanous. Dorsum uniformly punctured with fairly large, shal- 
low punctures. 
Differs from subaeneus by its slender and graceful form, 
finer puncturation, coloration (in subaeneus dark castaneus or 
entirely black), pronotal macula and translucent elytral mar- 
gins, which, according to Nonfried, is typical of the species. 
Allotype: 9, Szechwan, China, D. C. Graham, 1700 ft. In 
the United States National Museum, Washington, D. C. 
Prosopocoilus duplodentatus n. sp. 
Oblong, finely granulate punctate throughout, allied to P. 
rubens Didier. 
S Head nearly quadrate, broader than long, black, opaque, 
anterad concave, sloping abruptly toward the clypeus; clypeus 
subtriangular, with a feeble transverse marginal ridge, top 
rounded; antero-lateral angles rounded, behind the eyes acu- 
minate, the acumination extending beyond the eyes and over- 
reaching the anterior angles of pronotum; eyes fairly large, 
round, shining, encompassed halfway by the lateral diagonal 
canthus; anteocular bosses prominent, gently sloping toward 
the eyes; anterad to these and slightly inward a roundish fovea. 
Vertex shallowly and distantly punctured by fairly large trans- 
verse-ovate punctures, becoming larger (lunate) behind the 
eyes. Mandibles asymmetrical, longer than the head, porrect, 
uniformly arcuate, laterad rounded, interior margin dentate; 
left mandible with a broad basal cuspidate tooth and four well 
defined denticles; right mandible with six denticles, the fourth 
(from the base) largest; below the cuspidate tooth of the left 
mandible and the two basal denticles of the right, is a column 
of three teeth on the left and a like number on the right, making 
