18 Memoirs oj the Indian Museum, [Vol. VII, 



Aulacocyclus aruensis, Kuwert. 



Fig. Ill, 2. 

 Aulacocyclus aruensis, Kuwert, 1897, p. 282. 



Two specimens from each of the following localities : — New Guinea, Jobi, Aru, Ceram. 

 Length 21-25 mm - 



The antennae and elytra resemble those of the two preceding species. The central 

 tubercle somewhat resembles that of A. deyrollei, but is stouter and less elevated in front, 

 and has the apex perhaps a little more distinctly overhanging than is usual in that species. 



Aulacocyclus felderi (Stoliczka). 



Fig. Ill, 3. 



Comacwpes felderi, Stoliczka, 1873, p. 152, footnote. 

 Comacwpes felderi, Arrow, 1907, p. 447. 



One specimen from Amboina, and one from Honitetoe, West Seran 1 (? Ceram). Length 

 21 mm. 



This species differs from all others that are known in having the central tubercle 

 ungrooved, erect, laterally compressed and simply pointed. The antennal lamellae are long 



/ 



Fig. III. 



The central tubercle and supraorbital ridge of species of Aulacocyclus, from the left side x 4. 



1. -4. perlatus, Kaup. 5. A. tricvspis, Kaup. 



2. A. aruensis, Kuwert. 6. A. errons, Blackburn. 



3. A. felderi (Stoliczka;. 7. A. edentulus (MacLeay). 



4. A. mastersi, MacLeay. 8. A. teres (Percheron). 



and slender. The elytral grooves are scarcely punctured either above or at the sides, but 

 are decidedly stronger than in A. glabriusculus. 



Aulacocyclus mastersi, MacLeay. 



Fig. Ill, 4. 



Aulacocyclus mastersi, MacLeay, 1871, p. 174. 

 Taeniocerus mastersi, Kuwert, 1897, p. 275. 



Several specimens from Queensland (Port Denison and Clarence River), N. S. Wales 

 (Richmond River) and Victoria. Length 21-7-27-5 mm. 



The antenna! lamellae are somewhat stoat but moderately long. The central tubercle is 

 laterally compressed and comparatively low. It is somewhat variable, and may be scarcely 

 more elevated than in Taeniocerus bicuspis ; usually, however, it is somewhat higher and 

 the apex may even be faintly overhanging. The fine puncturing on the head is usually in- 

 conspicuous or absent. All the elytral grooves, except perhaps the first pair, are "very 

 finely punctured ; none of them are very deep. 



1 " Esp. Martin Til 92." Concerning the distribution of this species see Arrow, 1907, p. 447. 



