1»17.] 



DESCRIPTIONS OF TWO NEW SPECIES OF OETONIIDAE 

 BY OLIVER E. JANSON, F.E.S. 



Mycteristes tihetanus, u. sp. 



(? . Elongate, sub-deprosscd ; brassy green, shining ; prothorax bronze- 

 green, opaque ; elytra changing to reddish-testaceous in certain lights ; pygidium 

 bronze-brown, opaque ; base of head with the outside of the horns, tibiae and 

 tarsi bright coppery red ; clypeus, extreme lateral and basal margins of the 

 prothorax, scutellum, base of elytra and parts of the imder-side tinged with 

 coppery red, 



Head short and broad, the latei-al margins reflexed and produced into two 

 nearly straight porrect horns, which are strongly carinate on their upper-side 

 and separated at the base by a deep notch ; on the inside they are connected by 

 an obtuse curved carina which forms a basal limit of the clypeus 

 and at their apex they are abruptly bent inwards ; the clypeus is 

 short, rounded, polished, and has two feeble prominences on the 

 front margin ; the forehead is strongly concave and has a sparse 

 hirsute puncturation ; the base and the outside of the horns are 

 strongly punctured. Prothorax somewhat heptagonal, with a short 

 basal lobe ; slightly broader in the middle than long, convex, very 

 finely and densely punctured at the sides and more sparsely on the 

 disc. Scutellum large, with hirsute punctures at the base and 

 apex and two slight, dull green, discal depressions. Elytra depressed, 

 much wider than the prothorax at the base, narrowed behind and separately 

 rounded at the apex, each with two very feeble discal carinae, and a broad, shallow 

 basal depression bounded outwardly by a short humeral carina ; the entire sur- 

 face, with the exception of the carinae and apical tubercles, covered with a fine 

 strigiform puncturation, which is denser in the depressions, and with sparse 

 yellowish-grey adpressed setae. Pygidium concentrically strigose, sparsely 

 setose, and with a slight median impression towards the apex. The under- 

 surface and femora closely strigose and rather densely clothed with long 

 yellowish-grey pubescence, metasteruimi and abdomen closely punctiu'ed on the 

 central j^art, the latter with a lightly impressed median line ; mesosternal pro- 

 cess small and linear ; tibiae carinate and punctured, the anterior pair with a 

 very small marginal tooth about one-third from the apex. Length (excluding 

 the horns) 20 mm. 



Hah. : S. E. Tibet, Vriauataug (colL Janson). 



This very remai'kable and distinct species approaches khasiana 

 Jordan, in having two cephalic horns, but these are of a quite different 

 form, and arise from the sides instead of from the apex of the head, 

 as they do in that species. In this respect M. tihetanus bears more 

 similarity to Prigenia voUenhoveni Mohn., and it seems very doubtful 

 if the latter genus can be maintained. The great diversity of the male 

 armature in this group should evidently be regarded, as it is in Ontho- 



