82 Memoirs of the Indian Museum. [Vol. VII, 



halves of the sides, where it is densely hairy. The posterior intermediate areas of the 

 metasternum and the dorsal grooves of the elytra are unpunctured. 



Macrolinus latipennis (Percheron). 



Passalus latipennis, Perche- on, 1841, pp. 8-9, pi. lxxiii, fig. 3. 

 Macrolinus latipennis, Gravely, 1914c, pp. 245-246, pi. xiii, figs. 45-46. 



One specimen from P.Oelak Tanding ; two from Hili Madjedja, N. Nias ; one each from 



Bedagei Interior, ca. 6oo ft. and Bng. Proepoe, Padang Interior, i,6oo ft., Sumatra ; one 



from Tengger Mountain and several from Buitenzorg, Java ; two from Mt. Marapok, 



Dent Province, Borneo ; and one from Mt. Kina-Balu, Borneo, as well as a few without 



definite locality records. Length 22-5-25-2 mm. 



Macrolinus sulciperîectus, Kuweit. 



Macrolinus sulciperfectus, Kuwert, 1898, p. 184. 

 One specimen from Toli-Toli, N. Celebes, 26-7 mm. long. 



Macrolinus duivenbodei, Kaup. 



Macrolinus duivenbodei, Kaup, 1868 a, p. 19 ; 1871, p. 43, pi. iv, fig. 6. 



Four specimens from Celebes, three being from Menado and one from Loewoe. Length 

 26-28 mm. 



The first two antennal lamellae are more or less distinctly shorter than the remaining 

 four ; but all six lamellae are slenderer than in the Ceylonese species waterhousei & 

 rotundifrons associated by Kaup ( 187 1 ) in this respect with the present species. 



Macrolinus urus, Heller. 



Macrolinus urus. Heller, 1898, pp. 23-24. pi. i, fig. 26. 



Numerous specimens from Bua-Kraeng, 5,000 ft., S. Celebes. Length 35-4-41-5 mm. 



The first three antennal lamellae are much shorter than the last three. 



Although the elytra are united in most specimens 1 the lateral and intermediate areas 

 of the metasternum are distinct. This is also the case in Pleurarius brachyphyllus, from 

 the Indian Peninsula, 2 a species in which the elytra are concave between the shoulders and 

 the wings show little or no trace of reduction. The elytra of the present species are 

 convex between the shoulders and the wings or always reduced, being intermediate in 

 iorm between those of Pleurarius brachyphyllus and those of Macrolinus obesus. 



The key given to the identification of the different species of Macrolinus, on pp. 

 323-24 of my " Account of the Oriental Passalidae " requires considerable modification for 

 the species which I have now seen for the first time to be included in their proper places. 

 It may be emended as follows : — 



The frontal ridges complete and well developed, the inner 



tubercles more or less distinct . . . . . . . . . . 2. 



The inner tubercles, and the anterior part or whole of the 



frontal ridges, obsolete ; species confined to Celebes . . .... • • 13. 



1 In several they are separate, and show no signs of ever having been united. 



2 See Gravely, 1915, p. 496. 



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