18C1.] MR. E. BLYTH ON BIRDS FROM SIKKIM. 199 



and in the colouring of its body ; but the rich golden bronzy hue of 

 its tail at once distinguishes it from that and every other species. 



Hypuroptila isaur^. 



Head, all the upper surface, wing-coverts, flanks, and abdomen 

 coppery-bronze, inclining to purple on the lower part of the back 

 and upper tail-coverts; wings purplish brown ; tail very dark bronze, 

 inclining to purple ; throat and breast grass-green ; under tail- 

 coverts white ; upper mandible black ; under mandible fleshy, with 

 a black tip ; tarsi yellow or flesh- colour. 



Total length 4f inches ; bill \^ ; wing 2| ; taillf ; tarsi i. 



Hub. Bocca del Toro, in Costa Rica. 



Remark. — The specimen from which the above description was 

 taken is somewhat immature ; it is, however, sufficiently advanced 

 to show that it would have, when adult, a fine green breast ; but 

 whether the green colour would extend over the abdomen I am un- 

 able to say. It is nearly equal in size to the H. urochrysa, H. buf- 

 foni, and H. ccBruleigastra ; but it has a shorter wing and a more 

 rounded tail than either of those species, and the under tail- coverts, 

 although white, are less plume-Hke in form than in the typical Hy- 

 puroptilce. It is just possible that it may be necessary to separate 

 this bird into a new genus when we see it in its fully adult state ; 

 but it appears at present to be most nearly allied to the members of 

 the group in which I have provisionally placed it. I received this 

 bird from M. Edouard Vevreaux, of Paris, many years ago, since which 

 I do not remember to have seen another. 



The specific name isauree was suggested to me by my late highly 

 valued friend the Prince Charles Lucien Bonaparte, who wished thus 

 to convey a compUment to Madame la Baronne de la Fresnaye, the 

 niece of Montbeillard, the able coadjutor of the celebrated Buff'on. 



2. Notes on some Birds collected by Dr. Jerdon in Sikkim. 

 By Edward Blyth, Corr. Memb. 



TiCKELLiA, Jerdon & Blyth, n. g. 



Allied to Culicipeta and Abrornis, but with the bill depressed 

 throughout, and not compressed towards the tip ; the rictal vibrissse 

 well developed. Rest as in Abrornis, Hodgson. 



TiCKELLIA HODGSONI. 



Abrornis 1 hodgsoni, Moore, Horsfield's Catal. i. p. 412. 



Abrornis albiventris, Jerd. & Blyth, n. s. 



Allied to A. castaneivenfris, Hodgson, but distinguished by having 

 the abdominal region white ; no white on the tail-feathers, nor 

 yellow band on wing, but the lower tail-coverts yellow ; the ear- 

 coverts, in addition to the crown, pale chestnut ; throat white, and 



