228 PAPERS BY DR. B. CLEMEN^. 



branches. The posterior branch of the median is furcate. 

 Submedian furcate at the base. 



Head smooth. Ocelli none (?). Antennas setaceous, re- 

 motely denticulated in the $ , microscopically ciliated. 

 Labial palpi with the second joint beneath formed like a 

 brush, with the hairs produced in front; the terminal joint 

 smooth, pointed, recurved and needle-like. Maxillary palpi 

 not perceptible. Tongue of moderate length, clothed with 

 scales. 



The labial palpi in the imagos I refer to this genus are 

 not so much like a brush as those of Y. parenthesellus of 

 Europe, for a specimen of which I am indebted to Mr. H. T. 

 Stainton of London. In our species the second joint of the 

 palpi has not the long brush-like hairs along its under sur- 

 face, but are arranged almost into a tuft at the end of the 

 joint. 



The species described by Dr. Fitch, under the generic 

 name of Chaltochilus, belong to this genus. I have been 

 unable to recognize any of the following in his descriptions. 



Y.punctidiscellus. Wings narrow. Fore-wings pale ochre- 

 ous, dusted and[? with, H. T. S.] brown; along the costa towards 

 the base paler, rather whitish. At the base of the fold is a 

 brown dot, two of the same hue about the middle of the wing, 

 and one or two, likewise brown, at about the end of the disc. 

 Near the tip is an indistinct yellowish line, with a brown 

 band exterior to it. The hinder margin has a series of 

 blackish dots at the base of the cilia. Cilia similar in colour 

 to that of the fore-wings. Hind-wings somewhat plumbeous 

 gray. 



Antennae annulated with pale yellowish-brown and deep 

 brown. Head pale yellowish-brown. Labial palpi, second 

 joint dark fuscous, pale ochreous at the end; terminal joint 

 pale ochreous. 



Y. pauciguttellus. Fore-wings rather dull, uniform earthen 

 brown, irregularly and sparsely dotted with dark brown. 



