AO) MR. W. P. PYCRAFT ON THE [ Mar. 17, 
Key to the Genera of Cuculidee. 
a. Sternal plate with spina communis. 
ae spe border with two pairs of notches. 
’. Hypocleideum styliform, free end only overlapped by carina sterni. 
Rhamphococcye. 
6”. Hypocleideum styliform, overlapped by carina sterni. Hae Ts 
ce’. Hypocleideum oval, overlapped by carina sterni ...... ee te 
b’. Posterior border with single pair of notches ............... Coccystes. 
6. Sternal plate with spina externa only. 
ce’. Posterior border of sternal plate with two pairs of notches. : 
OD ’, Hypocleideum underlapped by carina sterni ............ Zanclostomus. 
’, Hypocleideum with free end only underlapped by carina. Geococeyw. 
ie “Posten ior border of sternum with a single pair of notches. 
f’”. Hypocleideum obsolete ; procoracoid small, affording articulation for 
scapula. ; 
a”, itt cula large and strongly arched ..................... Seythrops. 
wr ”” Burcula slender and slightly arched. — 
at, Posterior lateral process broad ...................... Hudynamys. 
64. Posterior lateral process narrow .... 2 Guia. 
g’. Hypocleideum obsolete ; procoracoid large, not ‘affording articulation for 
scapula... WREST ONC Cntropus: 
e. Sternal plate with | spina ‘interna ‘only. srodursvne avadagaooenasdased « /MKAROCONIE 
tos 
@. Sternal plate without spimeS <-: 2... s-2-2--29-2+ ee. eee een eens ee { poe nae 
e. ae nal plate with spina externa and interna distinct. 
. Posterior border of sternum with a single pair of notches. 
Cuculus. 
i’, Posterior border of sternum with two pairs ofnotches. Chrysococcys. 
D. Prtyic GIRDLE. 
A. Preacetabular ilium with strongly arched border meeting in the median line above 
the syusacral spines to form a large canalis ilio-lumbalis... Musopuact. 
B. Preacetabular ilia with dorsal border never meeting in median line above syn- 
SAGCKALIS DING eericee me ee CO CeCe iste CO CoE Eee ee sold OnU CELTS 
Key to the Genera of Cuculide. 
a. Presynsacral neural arches broad and without neural spines; ilia widely 
separated. : Cacomantis 
. With large intertransverse sacral foramina.................. ; Cini ‘ 
b’. me intertransverse sacral foramina. : 
. Length not exceeding 1 WHC? soossoosapadccasonenqasaccsace —CLURIROGRRETER. 
Bi Length not less than 2} inches... vee. Seythrops. 
b. Presy nsacral neural arches Theenibns a high ‘median ridge ; no intertransverse 
, sacr al foramina. 
ee process vestigial. 
. Antero-dorsal angles of pre-ilium not meeting in mid-dorsal line; pubis. 
very long....... mes Eudynamys. 
’. Antero-dorsal angles of pre- -ilinm meeting | in middle Geer 
line; pubis short ep Ms : a Guir oe Moke 
d’. Pectineal process large. 
e’’. Ischio-pubic fissure slit- shaped and very narrow. 
a’’’, Antero-dorsal angles of pre-ilium produced into Gorn 
narrow bars meeting WA, TANEOUS IOUT \s.cncossncoace0 000 d Dronscoeae 
b’’”. Antero-dorsal angle of pre-ilia produced inwards to form a quadrate 
plate embracing neural spines; postacetabular ilia produced into an 
enormous saddle-shaped WHEW soa ccsecnocosssccsecasovsne CGHANADBOI AD 
Sf’. Ischio-pubic fissure extremely reduced. 
e’’’, Antero-dorsal angle of pr e-ilia produced into a quadrate plate with con- 
cave superior border just reaching neural spine ..._ Taccocoua. 
d’’’, Antero-dorsal angle of ilia pr oduced into rounded Roe 
angles, not reaching the neural spines te : 
’ Tschio-pubic fissure very wide, closed ae Rhamphococcyx. 
