356 AMERICAN LEPIDOPTERA. 



that part of the pocket that lies inside the fourth segment having 

 no opening to the face of the ring. This part is also somewhat 

 curved and a little enlarged, to receive the folded up tip of the pen- 

 cil. On the second abdominal segment, just above the edge of the 

 slit opening into the pocket, is an elongate flap bordering a depres- 

 sion in which a portion of this pencil lies folded up, and acting as a 

 cover and protector to it. That part of the pencil beneath this flap 

 is quite apt to be darker in color than the rest of it. 



Covering the sensor}' disc, the pedicel and the base of the pencil, 

 is a delicate, elastic membrane, attached for the greatest part to the 

 first abdominal segment and serving as a complete covering to the 

 structure while it lies at rest. 



The species is sometimes common locally, and the larva, accord- 

 ing to Dr. Dyar, feeds on maple. 



Ainatlie!^ decipiens Grote. 



1881. Grt., Bull. U. S. Geo). Surv., vi, 269, Orthosia. 



1906. Hamps., Cat. Plial. B. M., Noct., vi, 491, pi. 107, f. 10, AmaOies. 



Mr. Grote's type was a female from Northern Indiana, taken in 

 June, and that is the only example now in the British Museum. 

 Hampson was therefore compelled to place the species in the section 

 in which the male had the antennse ciliate onl}^ by guess. The 

 occurrence of a good male shows a close ally of hicolorago, and, 

 indeed, Mr. Grote's comparison with that species or its variety /er- 

 ruginoides, is justified throughout. 



A specimen in my own collection is from Elizabeth, New Jersey, 

 taken October 19th, by Mr. S. T. Kemp. I have seen, altogether, 

 only four examples of this species, so it can scarcely be considered 

 common in a territory which is fairly well collected over. 



Amathes acta Smitb. 



1907. Smith, Trans. Am. Ent. Soc, xxxiii, 133, Orthosia. 



My examples are from Corvalis, Oregon, September to Novem- 

 ber ; Livingston and Corfield, Vancouver, in September; and Pull- 

 man, Washington, in October. The species is therefore of the 

 Northern Pacific Coast area, and will probably occur throughout 

 that general region. The species varies a little in depth of color, 

 and it is not improbable that examples of it are in collections as 

 pale forms of ferruginoides. Examples are in at least two other 

 collections that I have seen. 



