Vol. xxxviii.] 74: 
Insubr. u. p. 91 (1786—“ China,” ex Sonnerat, errore ! 
Substituted terra typica: Malay Peninsula). 
Synonym : Certhia cantillans Latham. 
g ad. Throat pale grey. Bill from forehead about ys 
12°5 mm.; wings of 20 males 47-50 mm. 
Malay Peninsula to Tenasserim and apparently to Cochin 
China, and has also been obtained at Pegu and in the 
Karen Hills. 
Diceum trigonostigma croceoventre Vig. (? partim). 
Diceum croceoventre Vigors, Mem. Raffles, p. 673 (1830 — 
Sumatra). 
There is a striking difference between Bornean and Malay 
Peninsula males of D. trigonostigma, the former having the 
throat much darker ashy grey. Wings of 17 males 47— 
49°2 mm. Unfortunately there are only two Sumatran 
males in the British and none in the Trmg Museum. Now 
these two Sumatran males, one collected by Wallace, the 
other by Bock, have the throats, it seems to me, as dark as 
the Bornean ones. In that case of course the Sumatran— 
Bornean form must be called croceoventre, but it is not often 
the case that Sumatran and Bornean forms are alike, when 
the Malaccan one differs. More Sumatran specimens should 
therefore be compared. 
Diceum trigonostigma megastoma, subsp. nov. 
¢. Similar to D. ¢. trigonostigma but bill considerably 
jonger. Bill from forehead 13°5-14°1 (two adult males) 
against 12-12°5 mm. in ten Malaccan males. 
Hab. Natuna Islands, between Borneo and the Malay 
Peninsula. 
Type: ¢ ad. Bunguran Island, 7.x.1893. A. Everett 
coll. (Tring Museum). 
(This cannot be D. t. hypochloum Oberh., described from 
two immature males from the Anamba Islands, between the 
Malay Peninsula and the Natuna group, as the latter is 
described as having the throat and upperside paler, the bill 
not appreciably longer.) 
