110 CYCLOMMATUS SQUAMOSUS. 



NOTE IV. 

 ON CYCLOMMATUS SQUAMOSUS RITS. 



BY 



C. RITSEMA Cz. 



In vol. XIV of the » Notes" (p. 45—48) I described 

 under the above name two male Lucanidae, one as belon- 

 ging to the forma major , the other as belonging to the 

 forma minor of the species: they were the only specimens 

 with which I was acquainted at that date. Now Mr. Ober- 

 thür sends me a beautiful series (18 cTcf and 3 99) ^^ ^ 

 Cyclommatus-s^ecies , found near Sandakan , North Borneo, 

 and utters the opinion that it may belong to Cydommatus 

 insignis Parry =z squamosiis Bits. A comparison of the 

 Sandakan-specimens with the type-specimen of insignis, 

 kindly forwarded to me by Mr. Oberthür, convinced me 

 of their identity. Moreover, the specimen from Brunei, 

 described by me as the major development of C. squamosus , 

 proved to be likewise identical with the Sandakan-species 

 {insignis Parry), but this can not be said of the specimen 

 from Sintang described by me as the minor development. 

 The latter undoubtedly belongs to a distinct species for 

 which the name squamosus may be maintained. It differs 

 from insignis (comparing specimens of similar development) 

 by the dentition of the basal portion of the mandibles ; 

 by the more deeply impressed head which is thicker (the 

 difference is very conspicuous when the head is seen 

 sideways) and has the front more steeply sloping; by the 

 more strongly protruding front angles of the thorax , which 

 moreover are broader, their outer margin being much more 

 strongly curved; by the narrower and parallel-sided elytra ; 

 by the slightly thicker tibiae, of which the anterior pair 

 are more strongly spined along the outer edge , etc. 



Leyden Museum, January 1894. 



Notes from ttie Ijeyden Museum, Vol. XVI. 



