18/8.] MR. D. G. ELLIOT ON THE GENUS PTILOPUS. 519 



have but one species, Pi. jambu ; while Java, the last locality in 

 which Ptilopus is found, contains two, Pt. melanocephalus and Pt. 

 porphyreus. 



The following key will show the chief differences existing between 

 the birds of this genus. I recognize 71 species, and have divided 

 them into two great groups, characterized by having the breast- 

 feathers bifurcate or not bifurcate. 



KEY TO THE SPECIES. 

 A. Breast-feathers bifurcate. 



a. Front and top of head purple or deep rose, 

 margined with yellow or pale green. 

 a'. Tail with a subterrninal grey or ash- 

 coloured band. 

 a". Abdomen deep rose-colour; under 

 tail-coverts yellow, tipped with 



rose ; breast bright green 1. Pt. greyi, p. 523. 



b''. Abdomen and breast washed with 



olive; purplish red spot on the breast 2. Pt. neglectus, p. 524. 

 c". Abdomen and flanks green, with an 

 indistinct spot of darker green in 

 the middle of the former; breast 

 ash-colour, tinged with green ; back, 

 wings, and tail green, with strong 

 coppery red reflexions ; inner secon- 

 daries with a small dark green 



spot on tip 3. Pt. bonapariei, p. 524. 



a . Abdomen pale green, with a purplish 

 black spot in the centre; breast 

 uniform ashy, tinged with green ; 

 scapulars with a conspicuous dark 



m ■■, Tiolet spot at tip 4 - PL Pm mratu >s, P- 525. 



b'. Tad with a terminal yellow band. 



a". No spot at base of mandible. 



1 . Centre of abdomen rufous 5. Pt. apicalis, p. 527. 



2. Secondaries and tad copper-colour ; 



small dark purple spot on lower 



part of abdomen. 



a. Front and crown purple 6. Pt. coralensis, p. 528. 



j3. Front and crown greyish purple 



or amethyst 7. Pt. chalcurus, p. 529. 



3. Middle of abdomen rufous, upper 



edge dark purple, scapulars tipped 



with lilac 8. Pt. pictiventris, p. 530. 



4. Feathers on upper part of breast 



with transverse violet spots near 

 the tips ; no spot on lower part of 

 breast ; abdomen orange ; erissum 

 yellow ; under tail-coverts white 

 at base, then yellow, with rose- 

 violet tips 9. Pt. pekwensis, p. 531. 



5. Throat white or pale yellow ; breast 



pale green, feathers tipped with 

 light grey ; abdomen orange, with 

 a Klac-red spot in the centre 10. Pt. regina, p. 531. 



6. Throat light yellow; breast pale 



green, feathers tipped with light 

 grey ; abdomen orange, with a pale 

 lilac band upon the upper part ... 11. Pt. cwingii. p. 533. 



