a 
270 =Mr. K. G. Blair on Types of Heteromera 
frequently known in collections. As I have shown else- 
where,* G. arenarium F., is in reality a 8. African species. 
5. Bradymerus serricollis (Opatrum), loc. cit. 
Several specimens from different collections in the 
British Museum, but none from outside Ceylon. It is 
very similar to B. denticeps Geb., from Borneo, the Malay 
Peninsula and Tonkin, but has the sides of the prothorax 
more strongly arcuate, with a very much wider explanate 
border. 
6. Byrsax horridus (Asida), op. cit. 11, 284. 
B. cornutus F. 
Not identical with B. horridus Oliv. (= tuberculifer 
Mots.), as given in the Catalogues. The two species, both 
found in Ceylon, are very similar, but B. cornutus 
(= horridus Walk.) is smaller, with the margins of thorax 
and elytra much more acutely dentate, the former with 
a deep round emargination on each side at the base. 
7. Dysantes biluna (Toxicum), loc. cit. 
Also from Ceylon in the Lewis and Bates collections. 
Two further specimens in the latter are labelled “ Neilgiris.”’ 
8. Platydema velutinum (Diaperis), op. cit. u, 283. 
P: tarsale Chevr. 
Received also from the Andaman Islands (Roepstorff). 
The species is closely allied to P. fumosum Lewis, from 
Japan, but the g (type) has a transverse row of four small 
indistinct elevations between the eyes, the outer ones 
almost contiguous with the eyes. There is also a similar 
elevation or tubercle in the middle of the front margin of 
the clypeus. P. tarsale Chevr., appears ex descr. to be 
identical: 
9. Platydema detersum (Crypticus), op. cit. 1, 284. 
P. malaccum Mars. 
P. laticorne Fairm. 
P. annamitum Fairm. 
A widely distributed Oriental species. The synonymy 
of the last three species has already been published by 
* Ann. and Mag. Nat. Hist. (8) xiii, 1914, p. 485. 
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