238 



Memoirs of the Indian Museum. 



[Vol. Ill, 



Description. — Length 30-33 mm. Differs from A. assamensis in the following 

 characters only : left outer tubercle slender, its distal angles more produced ; median 

 groove of pronotum entirely obsolete as in A. wallacei ; posterior parts of hind coxae 

 finely rugose; abdominal sterna as in ^. htma'ayensis ; seventh rib of elytra punctured 

 at posterior end only in the four specimens before me, as it was in Kuwert's 

 specimens also. 



Aceraius helferi, Kuwert. 



PI. xii, figs. 39-39«. 

 ?■ Tenasserim 



r 



~ (adult and lar- 

 [ vae in spirit) 



Upper Tenasserim 



I Between Misty Hollow and Sukli, ] 

 1 Dawna Hills, 2100-2500 ft. * 



r Between Thingannyinaung and | 

 [ Sukli, Dawna Hills, 900-2100 ft. 3 

 Rangoon 



J. Wood-Mason. 

 J. Wood-Mason. 



[ F. H. Gravely. 



Bombay Natural History 

 Society. 



There are specimens from Rangoon in the collection of the Bombay Natural 

 History Society; and specimens from Carin Ghecù 4000-5000 ft., Carin Asciuii Cheba 

 3500-4000 ft., Carin Cheba 3000-3500 ft., and Mt. Mauson 2000-3000 ft. in the 

 Berlin collections. 



Description. — Length 31-40 mm. Differs from A. tavoyanus in the following 

 characters only: left outer tubercle, though not quite constant either in size or shape, 

 normally with inner process more massive, sometimes itself truncate ; right outer 

 tubercle somewhat shorter, distance between apices of upper and lower portions of 

 its extremity greater, always more instead of less than half as great as distance 

 between apices of upper portion and right inner tubercle ; posterior parts of hind 

 coxae usually smoother ; seventh rib of elytra with or without punctures throughout , 

 or more often at the posterior end only.^ 



Habits. — This species lives in logs that have not decayed to any great extent. 

 It does not appear to be gregarious, adults being found only singly or in pairs, some- 

 times with larvae. 



Aceraius borneanus, Kaup. 



PL xii, figs. 25-25Ö. 

 Regd. No. ^ Borneo Sarawak Museum. 



The Berlin collections include specimens from Deli, Tebing tinggi, Peinan, 

 Sipora, Hili Zabobo, Batavia, Bandjermasin, Tandjong, Kina Balu, c. 5000 ft., Sampit 



' Present throughout in all the three Rangoon specimens, but none of the Tenasserim ones I have 

 seen. The character seems to be so often variable, however, that 1 do not feel justified in establishing a 

 separate variety for the former. All these punctures are usually, as Kuwert says, absent in the Tenas- 

 serim form, but even in specimens found within a few hundred yards of such typical ones they may be 

 present at the posterior end exactly as in .4. tavoyanus. 



