VOL. 111.] Nutneniiis Borealis. 257 



a Ceroplastes received from Silver City, N. M. I fully expected 

 that your form would prove identical with this. The beautiful species 

 which resembles a Trypeta belongs to a new genus of Encyrtina;. 

 We have the same species in the National Collection from Califor- 

 nia. The other species — the small black one — belongs to the genus 

 Tebrasticluis, and is a parasite not of the scale- insect, but of th«- 

 Aphycus. It is a tremendous genus and the species are not worked 

 up." ^ 



A SUPPOSED NEW FEATHER STRUCTURE: 



BY CHARLES A. KEELER. 



In examining a specimen of the Arizona hooded oriole (Icterus 

 cucullatus nelsoni), I observed what looked like fine black hairs 

 sticking out among the feathers on the head and back of the neck. 

 Upon extracting one of them, and examining it under the micro- 

 scope it had every appearance of being a true hair. In reality it is 

 probably a structure allied to the rictal bristles, but occurring in so 

 unusual a place, and lying down upon the feathers instead of stand- 

 ing erect it has the appearance of being a different structure. Being 

 unable to find any allusion to it I would propose, if it be indeed a new 

 structure, that it be termed Pseudopilum. They are present on 

 the backs of the neck and heads of all the orioles I have been able 

 to examine, and might prove to be a generic character. They also 

 occur in both sexes and in the young, although most numerous in 

 the adult male. 



ON NUMENIUS BOREALIS IN CALIFORNIA 



BY L. BELDING. 



I think Niimeniits borealis published by iVIr. Holterhoff in The 

 Auk (vol. i, 4, 393), and referred to by Mr. Bryant (Zoe iii, 2, 165), 

 was really A^. hudsonicus and Mr. Holterhoff was mistaken in iden- 

 tifying his specimen. I was in San Diego not long after he pub- 

 lished the note of its occurrence there and asked to see the speci- 

 men. He showed me a specimen of N. hudsonicus instead of N. 

 borealis, and as there is no other known record of its capture in 

 California, it is scarcely entitled yet to a place among Californian 

 birds. 



