on Dr. Jerdon's ^ Birds of India.' 349 



quite distinct. The specimen is still unique, and the species 

 should be looked for in Butan (c/ Ibis, 1865, pp. 30, 31). 



136. Ceryle rudis. 



Common in China, and doubtless the "white-spotted species'* 

 noticed in Siam by the late Sir R. H. Schomburgk (Ibis, 1864, 

 p. 247)*. 



139. Serilophus rubropygius (Hodgson) ; Gould, B. As. 

 pt. xxiii. pi. 



140. Homraius bicornis. 



Referred to Dichoceros, Gloger (1842), by Dr. Cabanis (Mus. 

 Hein. ii. p. 173). 



The Nipalese name, " Homrai," for this species is derived 

 from its note, which I have repeatedly heard uttered in the 

 Zoological Gardens. 



141. Hydrocissa coronata (Bodd.); PI. Enl. 873; " Bu- 

 ceros violaceus, Shaw,'' nobis, J. A. S. B. xxi. p. 352. 



143. Hydrocissa affinis is like H. albirostris, but of the 

 considerably larger size of H. coronata. The Malayan H. con- 

 vexa has the size and broader casque of H. albirostris, combined 

 with the wholly white three outer pairs of rectrices of H. coronata. 

 As compared with other races, differing in size only, the disparity 

 between H. affinis and H. albirostris is less marked than between 

 Hirundo rupestris and H. concolor, Phyllornis javensis and P. 

 cyanopogon, Himalayan Turtur rupicolus and T. auritus, but 

 equivalent to that in many other instances wherein the distinc- 

 tion is currently recognized, and greater than in some, as Turdus 

 hodgsoni and T. viscivorus, T. olivaceus and T. olivacinus, Bonap.f 



* [Mr. Swinhoe makes the same suggestion, supra, p. 292. — Ed.] 

 t The following additional instances of races differing only in size may 

 here be cited : — Milmia govinda and M. affinis ; Ephialtes (various) ; Alcedo 

 ispida and A. bengalensis ; M.egal<sma phiUppensis and M. indica ; Chryso- 

 colaptes sultaneus and C. delesserti; Hemicercus canente and H. cordatns; 

 Hierococcyx sparverioides and H. nisoides; Cucidus affinis and C. niicro- 

 pterus ; C. canorus, C. himalayanus, and C. poliocephalus ; C. temdrostris 

 and C. Jlavus ; C. dicruroides and C. luyubris ; Cajmmulyus indicus and 

 C. kelaarti; C. monticolus and C. affinis; Fregilus himalayamis and F. 

 gracidus ; PyrrTuda coccinea and P. mdgaris ; Crithagra hutyracca and 

 C. chryso2)ogon ; Estrelda amandava and E, punicea ; Pratiticola bicolor and 



