NO. 1803. HYPOTHYMIS AND CYAN0NYMPHA—0BERH0L8EB. 589 



reaching barely beyond middle of bill; feathers of crown stiffened; 

 tail not decidedly longer than the wing; and not so strongly rounded 

 or graduated. 



Type. — "Muse, caerulea Vaill. Afr. pi. 153" {= Muscicapa azurea 

 Boddaert). 



Geographical distribution. — Philippine Islands, Formosa, Hainan, 

 Cochin China, Burmah, Malay Peninsula, and India; south to Ceylon, 

 Sumatra and its islands, Java, Lombok, Sumbawa, and Flores; 

 east to Celebes and the Sula Islands. 



KEY TO THE SPECIES AND SUBSPECIES OP HYPOTHYMIS, BASED ON ADULT MALES. 



A. No blackish occipital patch. 



a. Upper parts deep pure blue Hypothymis abhotti. 



a}. Upper parts lighter, grayish blue. 



6. Size averaging smaller; lower parts not decidedly paler than upper surface. 



c. Blue above and below paler Hypothymis puella puella. 



c' . Blue above and below darker Hypothymis puella blasii. 



¥. Size larger; lower parts decidedly paler than upper suiiace.-Hypothy mis rowleyi. 



B. A black or blackish occipital patch. 

 a. Flanks and crissum pure white. 



b. No black collar on foreneck; black occipital spot indistinct. 



Hyj)othymis azurea ceylonensis. 

 6'. A black collar on foreneck; black occipital spot distinct. 

 c. Larger (wing 75 mm. or more); upper parts darker. 



Hypothymis azurea forrestia. 

 c^ Smaller (wing less than 75 mm.); upper parts lighter. 

 d. Blue of upper surface more purplish; wing averaging less than 70 mm. 



Hypothymis azurea azurea. 

 d}. Blue of upper surface less purplish; wing averaging more than 70 mm. 



e. Crown much paler than back Hypothyviis azurea coeruleocephala. 



e^. Crown not much paler than back Hypothymis azurea leucophila. 



a^. Flanks and crissum grayish or tinged with blue. 

 b. Crown decidedly paler than the back. 

 c. Wing less than 73 mm. 

 d. Back lighter, less purplish; pileum less strongly contrasted with back. 



Hypothymis azurea ponera. 

 d'. Back darker, more purplish blue; pileum more strongly contrasted with 



back Hypothymis azurea prophata. 



c'. Wing 73 mm. or more. 



d. Upper parts paler, less purplish blue Hypothymis azurea idiochroa. 



d^. Upper parts deeper, more purplish blue. 

 e. Larger (wing averaging 77.7 mm.); posterior lower parts usually more 



bluish Hypothymis azurea opisthocyanea. 



e^. Smaller (wing averaging 74 mm.); posterior lower parts usually less 



bluish Hypothymis azurea gigantoptera. 



v. Crown not decidedly paler than the back, 

 c. Posterior lower parts less heavily overlaid with blue, the white of median 

 abdomen more extended, never nearly absent. 

 d. Larger (wing over 70 mm.); blue less pnrplish... Hypothymis azurea isocara. 

 d\ Smaller (wing under 70 mm.); blue more purplish. 



Hypothymis azurea calocara. 



