460 BULLETIN 15 3, UNITED STATES NATIONAL MUSEUM 



teriorly by yellow) in the males; the black throat patch wanting 

 or poorly developed in the males ; the crown feathers of the females 

 very broadly tipped with black, being more black than reddish. 



5. T. e. sheUeyl. — Northern and eastern Somaliland from the 

 Goolis Mountains to the Ogaden district of eastern Ethiopia and to 

 Bera, Italian Somaliland. Similar in color to shelleyi, but smaller, 

 wings, 77-81 millimeters. 



Thus, to summarize the geographic variations of this barbet, we 

 find it decreases in size from south to north (especially to northeast) ; 

 the extent of the red on the back of the head in the males decreases 

 from southwest to northeast (decreases on the sides and front of the 

 head from south to northwest) ; and the black throat patch becomes 

 less developed from south and southwest to north and northeast. 

 Birds of the versicolor type occasionally occur in the ranges of 

 erythrocephalus and jacksoni. One of the males from Gardula is 

 of this type (with a yellow forehead). 



Reichenow " writes that young males resemble adult females, but 

 have the ocular region and anterior part of the cheeks pale yellow, 

 the chin whitish, a gray spot on the middle of the throat, and the 

 i:»ectoral band composed not of black feathers but of reddish yellow 

 or orange ones tipped with black. This all applies to young females, 

 but not to males. A juvenal male (with only partly grown tail 

 feathers) resembles the adult in having a black crown patch, but 

 differs in lacking the throat streak. It agrees otherwise with juvenal 

 females (which tit Reichenow's description), but in both sexes the 

 gray spot on the middle of the throat is not visible in freshly feath- 

 ered birds, as these grayish feathers are tipped with pale yellow, 

 and it is not until the tips are worn off that the gray color is exposed. 

 The postjuvenal molt begins on the breast, and the first noticeable 

 change is in the pectoral band which then becomes wider, and com- 

 jDOsed of black feathers with white medio-terminal spots. The male 

 from the Endoto Mountains is in this stage of molt. 



The adults vary in the amount and intensity of the red color on 

 the occiput and under tail coverts and also in the size of the terminal 

 black spots on the yellow nape feathers. Their size variations are 

 not great, but, because of the discrepancy in the dimensions of the 

 present series and the figures given by Neumann for his specimens 

 of jacksanl I append them here in tabular form. There ^s practically 

 no difference between the sexes. 



»5 V(3g. Afr., vol. 1'. \i. 155. 



