Sept., 1903 J Kearfott : New American Tineoidea. 153 



I have observed one habit common to all six species. Their eggs 

 are laid within a reasonable time after the moths' emergence (June 

 and July), in due course the young larvae hatch and begin a very 

 minute mine (the hemlock species I have not observed in its earliest 

 stage), which is slowly enlarged until cold weather causes torpidity, 

 and the larvae remain in these original mines until the earliest sunny 

 and warm spring days, when they desert the old mines and begin 

 new ones (in previous season's leaves) usually farther out or nearer the 

 end of the twig. One pitch pine needle is sufficient to complete the 

 larva's growth ; on spruce several are required and the holes in the 

 bases of these are connected together with slender tubes of silk, the 

 larva passing from one to another at will, and it may often be seen in 

 the tube, between two needles, seemingly enjoying the warmth of a 

 sunny day. 



The above-named moths can be separated by the following synopsis. 



Synopsis of Species. 



1. Forewing with whitish band from base to outer margin, parallel to costa 2 



Forewings without this band 3 



2. Subcostal band on forewing continuous juniperella. 



This band interrupted about one third from apex Obliquistrigella. 



3. Forewing with three oblique costal dashes 4 



Forewing without these dashes 5 



4. Forewing grayish fuscous thujaella. 



Forewing ochreous fuscous piceaella. 



5. Forewing with three white vertical bands from costa to dorsum pinifoliella. 



Forewings amber color, an oblique white streak from middle of costa. 



apicitripunctella. 



The following synopsis will indicate the principal differences in 

 the larvje ; the most similar pair of moths thujaella and piceaella are 

 very distinct in the larvfe. All comparisons are from mature larvae. 



Synopsis of Larv.^;. 



1. Head and prothoracic shield very dark brown, almost black 2 



Head and shield light brown 3 



2. Skin green apicitripunctella. 



Skin brown pinifoliella. 



Skin red thujaella. 



3. An open red square on abdominal segments confined to dorsal region 



obliquistrigella. 



These squares extending to below spiracles juniperella. 



Red predominating on dorsal and lateral regions piceaella. 



