268 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



Family SCARABAEIDAE. 



COPRIS LUGUBRIS Boheman. 

 Copris Ingabrin BoiiEMAN, Frcgattcii Euijcnie^ti Kcsa, Zool., IS.^S, I, p. 42. 



ORYCTES GALAPAGOENSIS Waterhouse. 

 Orycie>i galapagoenxia Waterhouse, Ann. Nat. llist., 1S45, XVI, \}. 2(). 



One female was collected on Chatham island by the Albatross ex\)e 

 dition in 1888, and si.K males were taken by Dr. G. Baur on the same 

 island. It is a light-bvown shining insect, wider behind, resembling 

 in form the Sonth American Bothynus ascanius Kirby. The i)unctua- 

 tion is sparse and fine and the sutural stria distinct. The ventral 

 surface is moderately hairy. Wings are present, but seem to be some- 

 what aborted. The length of the female is 23 mm., of the males 16 to 

 19 mm. The generic characters are very different from Oryctcs Illiger, 

 all the species of which inhabit the Old World. It should form a new 

 genus in the group Pentedontides of Lacordaire, and the following name 

 is proposed for it: 



PSEUDORYCTES, new genus. 



Mentum large, elongate, convex, arcuately narrowed to apex. Man- 

 dibles prominent, with the exterior n)argin entire, strongly rounded. 

 Antennae ten jointed, club small in both sexes. Head transversely 

 depressed between the eyes, the canthus angulate and i)rominent. 

 Clypeal suture raised into an obtuse bisinuate ridge, more prominent at 

 middle and at the side margin. Clypeus broader than long, subtrian- 

 gular, sinuate toward apex (in the male slightly longer and more 

 sinuate than in the femahi); apical margin retlexed, obsoletely emargi- 

 nate. Thorax transverse, very convex, deeply emarginate at apex, 

 strongly rounded at the sides, without any impressions in either sex; 

 the posterior angles obtuse in the female, rounded in the male. Strid- 

 ulating organs forming two longitudinal bands on the middle of pro- 

 pygidium, parallel in the female, convergent to apex in the male. The 

 apical margin of this segment is feebly rounded in the female, in the 

 male prolonged in an acute triangle. Pygidium convex and entirely 

 glabrous in the male, in the female with a slight rounded impression at 

 the middle and the margin ciliate. Prosternum with a conical protu- 

 berance behind the coxae. Legs moderately stout, the anterior tibiae 

 quadridentate in the female, in the male trldeutate, with tlie margin 

 above the teeth flattened and rounded. Posterior tibae with two oblique 

 ridges, the apex moderately expanded, truncate and fimbriate. Poste- 

 rior metatarsus triangular, scarcely longer than broad. Claws simple. 



Type. — Oryctes gakqmyoensis Waterhouse. 



