( 494 ) 



rngulosum, snblaeve, pnnctis in jiarte ililatata apiculi ilistincliorihiisi. Prothnrax 

 longitndine sexta parte brevior, subglobtisns, lateribus postice fere rectti>, in teitia 

 parte autica sat subito autrorsum attennatns ; basi aute scutellum leviter 

 rotniulato-flilatatBs, ntrinqne parnm siniiatns ; minntissime pnnctnlatus, obsolet- 

 issime rngulnsns, dispersis ])nnctiK, versus latera sensius, instructns. Scutx'Ilnm 

 triangiilare, lateribus minime iueurvatnni, aj)ice acutum, basali diniidio punctatum, 

 apice laeve. Elytra retrorsnm attenuata, augnlo suturali dentata, quinciuestriata, 

 striis 6° — 9* lateralibus postice sat distinctis, iu interstitiis sparsissime sensim, 

 postice densius, jiuuctulata, lateribus obsoletissime rngnlosa. 



Prosternuni furtiter graunlosuni ; prooessu medio j)Osta>xali valde ijilobato. 

 Metasternum sparsissime punctulatum, sulco mediano interdum antice rngato- 

 pvuictato instructnin. Abdomen disperse obsolete punctulatum, pnnctis in 

 segmentornm basi et lateribus densioribus majoribus ; segmentis tertio ad quintnm 

 lateraliter spatio sat grossc punctate ; segmentnm ijuintnm parte dorsali sub- 

 pygidiali fortiter punctatum. Pygidium convexum, apice fortiter dcclive et 

 rotundatum, hand marginatum, linea media impressa, lateribus dense, medio 

 vix s])arsius sed minutius punctatum. 



Pedes antici valde elongati, femoribus basi curvatis, tibiis apice fortius 

 quam basi arcuatis. 



S . Caput fortius quam in mare jjunctatum ; rostrum supra leviter tricarinatnm, 

 carina media obtusa, lateribus subcarinatum. Protliorax et elytra sensius 

 punctulata quam in tnare. I'ygidium subacute triangulare. 



c? Long. (cap. excl.) 3'.t mm., rostr. 15, elytr. 'M, lat. 18. 



S „ 20 „ „ lU „ 12 „ 11. 



? „ 36 „ „ 11 „ 16 „ 16. 



? „ 26 „ „ „ 11 „ 11. 



The brick red colour of this species varies much iu extent, and occujiies 

 the whole ujiperside of the elytra iu many specimens ; the basal blai'k spot of 

 the prothorax is sometimes very feebly marked. The sides of the meso- and 

 metasternum are brick red with the sutures black ; the last abdominal segment, 

 which usually is black in large males, is of a brick red colour in smaller males 

 and in females, except the tip, which is blackish. The punctuation of upjjerside 

 is stronger in small specimens and in females than in large males. 



In structure this form is more closely allied to R. buqueti (Guer.) than to 

 R. (lux (Boh.) ; in the length of the rostrum, and the outline of the elytra 

 it stands between these species, from both of which it is distinguished by the 

 bright brick red colour of the prothorax. 



The rostrum is less dilated at the tip and proportionally shorter than in 

 li. dux, but somewhat longer than in R. huqueti. Th(i jirothorax is shaped almost 

 as in R. huqueti, but a little more convex, while the elytra are longer than in 

 this species and resemble more those of R. dux. The anterior tibiae of the 

 male have the form of those of R. buqueti. 



From R. dichrous (Fairm.) {Ann. S. E. Fr., 1878, p. 273) it diflers in colour, 

 in the form of the anterior femora of the male, "these femora being almost straight, 

 and a little arched at the base " in R. dichrous, in the jjrosternum being 

 granular iu R. borealis, and not punctured as in R. dichrous, in the punctuation 

 of the elytra being more distinct on the sides in R. dichrous, while in R. borealis 

 the sides of the elytra have •scarcely any distinct punctures. 



Hab. Oraei-Shan (China). 



