DESCRIPTIONS OF TWO SUMATRAN SPECIES 



OF THE LUCANOID GENUS CYCLOMMATUS 



IN THE GENOA CIVIC MUSEUM 



BY C. R1TSEMA CZ. 



Cyelommatus Mocligrlianii, n. sp. J and 9 . 



This is a small species with proportionately short mandibles, 

 these being (in specimens which I believe to belong to the forma 

 major) but slightly longer than the head. 



It is closely allied to Cyelommatus Dehaani Westw. {a/puis Parry) 

 being covered with scales and having the head declivous ante- 

 riorly (neither excavated nor perpendicularly truncated), but it 

 is considerably smaller, the mandibles and the clypeus are 

 otherwise shaped, and the head is nat above, not hollowed as 

 in the forma major of Dehaani. 



I have before me four males of equal development and measu- 

 ring (with the mandibles) from ^6 1 / 2 - L 2\ mm. The length of 

 the mandibles varies respectively from 7- 4 1 / 2 mm. 



The colour of the insect is pale chestnut with aeneous tinges 

 which are, however, very faint on the elytra. The teetli of the 

 mandibles, the scape of the antennae and the tarsi are black, 

 the palpi and the flagellum dark brown. 



The basal two-thirds of the mandibles, the head, the pronotmn 

 and the scutellum are covered with small roundish white scales; 

 on the elytra the scales are smaller and very sparse, but on 

 the sides of the basal half they are larger, elongate and very 

 densely set. On the undersurface and on the metallic coloured 

 portion of the femora the scales are very densely set. The tibiae 

 are pubescent and the undersurface of the tarsi is fringed with 

 golden yellow hairs. 



