302 STAG-BEETLES (FAM. LUCANIDAE) 



The tip Ib acute and slightly curved inwards. About the 

 middle of the mandibles their upper surface shows a well- 

 developed tooth directed upwards. At first the mandibles are 

 sinuated downwards, then horizontally directed. The inner 

 margin and the tip are black. The prothorax is broader than 

 the head, the sides waved and forming an acute tip near the 

 base ; behind this tip the prothorax is strongly narrowed ; on 

 the disc we may observe two grooves and some vaultings. The 

 elytra, narrower than head and prothorax, have the sutures 

 raised and each has 4 longitudinal (the sutural incl : = 5) 

 slightly elevated costae, which are, like the sutures, thickly 

 clothed with brown erect scales. These costae are not so well 

 developed as in G. tricnspis. Near the tip the elytra are 

 situated 2 black shining tubercles. The legs are slender and 

 squamose, the anterior tibiae are armed with 2—3 teeth, the 

 posterior with 1 tooth. 



The type in the Sarawak Museum collection. 



1 cf from Mt. Poi, 4000 feet. 



G. TBicuspis Bits. 



Notes Leyd. Mus., iv, 1882, p. 163; Midden Sumatra, SuppL, 

 1892, p. 4; Notes Leyd. Mus., xv, 1893, t. 2, f. 5; Mollenk. Intern. Ent. 

 Zeitschr., iii, 1909, Nr. 11, p. 58 9. 



1 Cf , 1 9 , from Mt. Dulit, 3500 feet. 



Explanation of Plate 12. 



Fig. 1. la Cyclomniatus magnificus (S sp. n. 



2. 2a Eurytrachelus mjobergi cf sp. n. 



3. Odontolabis leuthneri var. brunnea (S var. nova. 



4. Xenostomus krieschei 9 sp. n. 



5. Gnaphaloryx borneensis 9 sp. n. 



6. Gnaphaloryx ■pallidus <3 sp. n. 



7. Aegus sexlineatus (S sp. n. 



8. Aegus falcicornis cf sp.n. 



9. Aegus punctatissimua Cf sp. n. 



