524 Records of the Indian Museum. [Voi,. VIII, 



The right mandible is moderately stout, bifid at the tip, and 

 grooved externally. The dorsal tooth in front of the mandible-sac 

 is low and broadly truncate. The left mandible is similar, its 

 dorsal tooth is very small. 



Both the lacina and galea of the maxilla are tipped with stout 

 hairs; the last joint of the palp is barrel-shaped, with obliquely 

 truncate extremity. 



The mentum is trapezoidal, with lightly convex sides. 



The femora of all the legs are slightly swollen. The tibiae are 

 broader distally than proximally. The tarsi are bordered by fine 

 spines. 



Platydema subfascia, Walk. 



This species is known from India, the Sunda Islands, S. China, 

 etc. I obtained one specimen at Kawkareik in Tenasserim. 



Platydema annamitum, Fairm. 



Hitherto known only from Indo-China. Mr. Kemp obtained 

 specimens from under bark at Yembung, iioo ft,, 8-ii-i2, and at 

 Rotung, 1400 ft., 28-xii-ii. Both of these places are in the Abor 

 Country. 



Platydema nigroaeneum, Motsch, 



Hitherto only recorded from Japan. Mr. Kemp obtained it in 

 the Abor Country from rotten wood at Kobo, 400 ft., i-xii-ii, 

 and there is a specimen in Gebien's collection from Phuc Son in 

 Ann am. 



Platydema alticornis, n. sp. 



(Plate xliii, figs. 4, ^a.) 



Moulmein (Tenasserim), i6-xi-ii . One specimen. 



A somewhat flatter insect than P. aurimaculaia, black through- 

 out, and distinguished from all known species of the genus by the 

 erect horn above the left eye. Length 5'5 mm. 



The head is roughly semicircular, but is slightly angular in the 

 middle line in front. It is polished and punctured throughout. 

 Its margin is raised; the area between the eyes is depressed, and 

 from this depression a pair of arched grooves extends forwards on 

 either side of a slightly higher circular area. Behind the depres- 

 sion the surface is elevated to about the level of the pronotum, and 

 on either side of it is a tubercle — a low one with approximately 

 rectangular apex on the right side, and a tall erect one, ending 

 in a tuft of hair, on the left. 



The pronotum is closely punctured but less highly polished than 

 the head. It bears a very indistinct median groove, with a pair of 

 depressions on either side of it against the posterior margin. 



The elytra are also somewhat dull ; they bear rows of punctures 

 arranged as in P. aurimaculata but much more deeply impressed. 



The lower surface of the head is rugose in front and punctured 

 behind. 



