1914.] F. H. GRAVEI.Y : An Account of the Oriental Passalidae. 245 



Mesosternum smooth and polished throughout, a few strong punctures sometimes 

 present along inner margin of each scar. Elytra with lateral grooves of normal 

 width, strongly punctured, but not transversely grooved. 



Habits. — This species is very common in the Royal Botanical Gardens at Pera- 

 deniya, where it lives among the piles of dead leaves, etc., that are put to rot away 

 on the river bank. 



Macrolinus waterhousei (Kaup). 

 PI. xiii, fig. 44. 



Regd. No. '^ Bulutota, Ratnapura Dist., Ceylon Colombo Museum. 



Description. — Length 33-35 mm. Differs from M. rotundi/rons in the following 

 characters only. Median part of mentum sparsely punctured. Ridge between inner 

 tubercles of head scarcely convex, almost straight, so closely approximated to ridge 

 between outer tubercles throughout its length as almost to conceal it (differing in 

 this respect from M. andamanensis). Pronotum unpunctured but (? always) with 

 a more or less obscure depression in place of the strongly punctured area behind 

 anterior extremities of marginal groove. Scars of mesosternum indistinct or absent. 



Macrolinus weberi, Kaup. 



Described from a single specimen from the Philippines in the collection of the 

 Königliches Zoologisches Museum in Berlin. 



Description. — Length 25 mm. Differs from the following species only in having 

 the first two lamellae of the antennae somewhat shorter,- and the anterior face of the 

 central tubercle of the head almost vertical to the general surface. In the former 

 respect, and in its locality, it agrees with Kaup' s description of M. weberi, but the 

 differences are very minute, and in the absence of other similar specimens I very 

 much doubt whether it is really distinct. 



Macrolinus latipennis (Percheron). 



Regd. No. ~ Malacca ? 



,, 55p Johore J. Wood-Mason. 



There is one specimen from Borneo in the Sarawak Museum collection ; and the 

 Berlin collections include specimens from Deli, Nias (Ombolata), Buitenzorg, S.-E. 

 Borneo, and South Palawan. 



Description. — Length 22-5-27-5 mm. Labrum punctured and hairy, anterior 

 margin straight, angles rounded. All six lamellae of antennae very long and slender, 

 their extremities arranged in a straight line when the antennae are furled. Upper 

 tooth of mandibles small or obsolete ; lowest terminal tooth smaller than the two 

 upper ones ; anterior lower tooth conical, that of the right side slightly smaller and 

 more acute than that of the left. Mentum smooth between the scars or with a few 

 punctures near the middle-line. Head closely and finely punctured throughout above, 

 or with the anterior half of an area in front of the short parietal ridges and outside 

 the frontal ridges, and a small patch immediately behind the former, more or less 



