35 [Yol. xliii. 



head darker, almost blackish against dark grey. Feathers 

 of head with still darker median parts. Back and mantle 

 darker olive-green and less tinged with yellowish. White 

 on throat less pure, more creamy, and also of less extent. 

 Centre of abdomen only mixed with a few dull yellowish 

 feathers, not pale yellow as in the typical race. Under tail- 

 coverts dull ochraceous instead of rusty yellow. Primaries 

 and secondaries margined with darker green on the outer 

 webs of the feathers. 



Dimensions of type. Total. length 213 mm. ; wing 107 mm. ;. 

 tail 93 mm. ; culmen 18 mm. ; bill from gape 24 mm. ; 

 tarsus 22 mm. 



Type. Adult female, collected at Campi ya Wambutti, 

 Ituri forest, west of Irumu, 11th June, 1921, by N. 

 Gryldenstolpe. Type in the R, Nat. Hist. Museum at 

 Stockholm. 



Named in honour of Major M. Weiler, one of the Belgian 

 officers attached to H.R.H. Prince Wilhelm of Sweden 

 during the Expedition. 



Trochocercus nigromitratus intensus, subsp. nov. 



Diagnosis. Similar to T. n. nigromitratus Rchw. from 

 Cameroon, but easily distinguished by having the upper as 

 well as the underparts of the body dark bluish-grey, con- 

 siderably darker than in the typical form. Lower abdomen 

 and under tail-coverts only very slightly paler and less 

 bluish than same parts in the typical race. Secondaries 

 rather broadly margined with dark bluish-grey on the outer 

 webs. Rectrices blackish, distinctly margined with dark 

 bluish-grey, this latter colour most distinct on the upper 

 half of the feathers. Size slightly smaller than typical 

 T. n, nigromitratus. Wings 59 mm. against 62-65 mm. 

 From T. n. toroensis Jacks, it differs by the total absence of 

 a white area on the abdomen. 



Dimensions of type. Total length 141 mm.; wing 59 mm. ; 

 tail 61 mm. ; culmen 11 mm. ; bill from gape 16 mm. ; 

 tarsus 15 mm. 



