NOVITATES ZOOLOGICAE XXI. 1014. 173 



No. 5. Coll. Lillo (Tacumjin), ad. Tucnmun, N.W. 



Ara-entine, August 12, 1901, L. Diuelli coll. Wing 07; tail 53; bill Si mm. 

 No. 6. Tring Museum : d ad. Camp woods, Prov. 



Sara, Bolivia, June 23, 1906, J. Steinbach 



coll. No. GOT Wing 04; tail 50 ; bill 8^ mm. 



Berlepsch and Hellmayr * have shown Plu/llomi/ias subviridis to be widely 

 different from Xanthnmi/itm rirescens (Temm.) [= Pki/llomi/ias burmeisteri Cab. & 

 Heine], creating for its reception the new genus Acrorhordopus. At the time of 

 their writing this well-characterised species was only known as an inhabitant 

 of South-eastern Brazil, but several years afterwards two more specimens — one 

 from Tucumau (No. 5), and another from Sara, Central Bolivia (No. 6) — were sent to 

 me for inspection. While studying these interesting birds I was struck by their 

 close similarity to the types from Brazil, and it occurred to me that P. salcadorii 

 Dub. (= P. herlepschi Salvad. nee Sclater) might have been based on an example 

 of the same species. Count Salvadori having most obligingly forwarded the 

 typical specimen for comparison, I found my surmise to be quite correct. 



In fact, the bird from San Lorenzo (No. 4) has the characteristic shape of the 

 bill, the peculiar verrucose scutellation of the lower portion of the metatarsus 

 and of the toes, the relatively short tail and the pattern of the upper wing-coverts, 

 as described at length by Count Berlepsch and myself. I am glad to say that the 

 Count, after re-examining the type of/", salcadorii, fully concurs with my view. 



There is no constant difference, as far as 1 can see, between specimens from 

 various localities, although I notice a certain amount of individual variation. The 

 Tucumau bird (No. 5) is duller (less yellowish) green above, and the forehead and 

 crown are slightly mixed with grey, which is not the case in the other examples. 

 The female from Ypanema (No. 2) and the type of Ph. salvadorii (No. 4) have the 

 back rather brighter green than No. 5 (Tucumiln), but the males from Ypanema 

 (No. 1) and Bolivia (No. 0) are even more brightly coloured above. The couple 

 from Ypanema and the Tucuman specimen agree in being underneath of a rather 

 pale yellow, while the birds from S. Lorenzo and Bolivia have much deeper, maize- 

 yellow underparts, with more greenish suffusion on the foreneck and chest. The 

 yellowish edging to the wing-coverts is quite tyjiical in Nos. 1-5, rather more 

 prominent in the Bolivian skin (No. 0). Thus, it will be seen that the small 

 differences in coloration are not connected with any geographical area. 



It appears, however, that the birds from N.W. Argentine and Bolivia are 

 slightly larger, especially in the tail, and if constant this would necessitate the 

 recognition of a western form entitled to the name A. siibviridis salradorii (Dubois). 

 The specimens from Paraguay (Sapucay), recently recorded by Mr. Chubb f s. n. 

 A. subtiridis might perhaps help to elucidate the question whether there arc really 

 two races of this peculiar bird. 



81. Capsiempis orbitalis Cab. should be Pogonotriccus orbitalis (Cab.). 



Capsieiiijii.i orbitalis Cabaiiis, Jniirii. f. Oniitli. 21, p. 08 (1873. — Monterico, Chanchamayo, C. Peru, 

 coll. Jelski ; Mus. Univ. Warschau). 



No. 1. University Mus. Warsaw, mounted : 

 " Capsiempis orbitalis Cab. S typ. descr. 



Peru, C. Jelski et C. C. Branicki " . . Wing o5i ; tail 40 ; tars. 15 ; bill 



10 mm. 



• JmiTii.f. Orn. 53, 190,''>. pp. 2(;-27, t ^'"'s. I^IO, [i. 583, 



