SI'MATRAN LUCANIDAE 621 



The mandibles are as long as the head and half the prothorax 

 taken together; they are curved downwards and inwards at the 

 apex and armed about the middle of their inner edge with a 

 short tooth ; the sub-apical tooth is stout , slightly curved and 

 directed backwards and , consequently, diverging with the apex ; 

 between the sub-apical tooth and the apex of the mandibles are 

 in the three larger specimens two unequal teeth in the left, 

 one tooth in the right mandible : in the smallest specimen , 

 however, one tooth in each mandible. The raised outer upper 

 margin of the apical half of the mandibles slopes rather suddenly 

 at some distance from the apex. 



The head is Hat above, the flattened portion without distinct 

 margins and sloping anteriorly towards the clypeus which is 

 broad, bisinuate anteriorly, and with pointed lateral angles. 



The intercoxal part of the prosternum is conically porrected, 

 and the tibiae are unarmed and nearly straight. 



The described specimens have been captured at Si-Rambé 

 (Tapanuli Residency, West Sumatra) by Dr. E. Modigliani to 

 whom I have dedicated this species. 



In the same lot of beetles was a female Cyclommalus from 

 the same locality as the above mentioned males, which female, 

 1 believe, may belong to this species. 



It closely resembles the female of Dehaani, but the anterior 

 half of the prothorax is less broad, its sides being straight, not 

 strongly convex as in Dehaani. Moreover the punctuation on 

 the upper side (especially on the pronotum) is finer and wider 

 apart which gives this female a more glossy appearance. It 

 measures 18 mm. in length. 



At the same locality (Si-Rambé) Dr. Modigliani captured, 

 besides a couple of Cydominatus Pasteuri Rits. , a male and a 

 female of another magnificent Cyclommalus- species, the most 

 robust one I ever saw. 



In 1881 Dr. Gestro described (*) the minor development of 



(») Ann. del Mus. Civ. di St. Nat. di Genova. Vol. XVI, 1881, p. 3n9, ny. 



