Luccmidce of Japan. 341 



dead and moss-grown, and then found it in little round 

 holes it had gnawed out in the wood under the bark to 

 winter in. In June I found it at Chiuzenji, and the 

 following spring on Oyayama, near Kumamoto, always 

 getting it in the way described. 



Aulacocyclus patalis, n. s. (PL XIV., figs. 6, 7). 



Convexus, parum elongatus, niger nitidus, capite dila- 

 tato, utrinque lamina erecta, apicem versus latiore, mar- 

 gine superiore emarginato. Prothorace convexiusculo 

 minutissime punctato, anteriore in medio binoduloso, 

 dorso canaliculato ; elytris striis punctatis, interstitiis 

 convexis. Long. Sj — 9 lin. 



Twenty-five specimens. 



Convex, black, shining ; head impunctate and dilated ; 

 the outer margins at each side are produced into robust 

 spreading horns, and the anterior angles of the head are 

 acute and prominent, with a carina running back from 

 them and half crossing the eye. The thorax is smooth, 

 with very fine scattered punctures, emarginate at the 

 sides and base. Anteriorly the middle is produced into 

 two rather prominent nodules ; the elytra are very con- 

 vex for this genus, and deeply punctate- striate with 

 convex interstices. There is no external difference in 

 the sexes. In the genus Nigidius the frontal carina 

 completely crosses the eye, dividing it in the middle. 



This species is very distinct from any other yet known, 

 and perhaps later a new genus should be formed for its 

 reception. But it would not be easy to define it at 

 present owing to the want of some of its nearest allies 

 for comparison, and the fact that Kaup's geDera of Passa- 

 lini are somewhat vaguely characterised. A. platypus, 

 Kaup, from Thibet, of which there is a series in the 

 National Collection, is the nearest species I know to it. 



I took twenty specimens on the 1 1th May, 1881, in three 

 or four decaying hard-wood trees of three feet girth, which 

 had been blown down and had remained five or six years 

 under shade of a dense forest above Yuyama, on the 

 western side of Ichibosayama. The bark came off easily 

 in the hand, and the specimens were resting, after the 

 manner of Passalini, in the black wood-mould it had 

 covered. A native collector the next year obtained a 

 few more on the same spot. I found Passalini in Ceylon 

 in corresponding abundance to the Lucanini in Yezo. 



TEANS. ENT. SOC. 1883. PART III. (AUG.) 2 C 



