AND ALLIED GENERA. 67 



h' . Feathers on rump more or less lanceolate and 



centrally streaked with white Ptilocichla. 



b. Size smaller, tail shorter, less than double the 

 length of the tarsus, outstretched feet exceeding 

 the tip of the tail. 



a'. No pale shaft-streaks on the upper surface. . Ptilopyga. 

 h'. Upper surface with more or less conspicuous 

 fulvous shaft-streaks. 

 a". Feathers on upper surface on both sides edged 

 with black. 

 «3. Larger, bill shorter and stouter than is 

 the rule in this group, no light spots on 

 the tips of wing-coverts and secondaries. Lanioturdinus. 

 b^. Smaller, bill normal, slender, light spots 



on wing-coverts and secondaries. . . . Turdinulus. 

 b". Inner web of the mantle-feathers black, bill 



as long as the tarsus, slender and curved. Rimator. 

 B. Color of plumage on upper surface plain, never 

 mottled with black or fulvous. 



a. Tail short, never much more, in some cases even 

 less, than once and a half the length of the tarsus. 



a'. Bill stout, nasal opening rounded and placed 



in front of the membrane Malacocincla. 



b'. Bill slender, nasal opening linear and placed 

 at the lower edge of the membrane. 

 a". Rictal bristles present. 



«3. Larger, tarsus more than 2,5 cm., bill more 



timeliine Anuropsis. 



b^. Smaller, tarsus less than 2,5 cm., bill more 



muscicapine Crateroscelis. 



b". Rictal bristles absent Amaurocichla. 



b. Tail about twice as long as the tarsus, or some- 

 what more. 



a'. No distinct superciliary streak, rictal bristles 



well-developed, reaching beyond the nostrils . Trichostoma. 



b' . A distinct white or ashy white eyebrow, rictal 

 bristles wanting or short, not reaching the 

 nostrils Drt/mocataphus '). 



1) Directly behind this genus must probably be placed Drymochaera Finsch 

 (see after, p. 94), on accoant of its grayish white eyebrow and its tail being 

 twice as long as the tarsus; in fact I am unable to find in the description 

 any character striking enough to separate it from Brymocataphus, except, per- 

 haps, the pale-colored head and the white under wing-coverts, which both 

 characters are unusual in this genus. 



r^otes from the Ley den IMuseum, Vol. XVII. 



