54 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



In 1913 Mr, Josef Bnimicr of the Bureau of Entomology reared a large 

 series of motlis from larvae feeding in the cones of Pseudotsuga taxifolia 

 in the neighborhood of IVIissoula, Montana, These were determined 

 by Mr. Busck as a new species close to, but distinct from, sisMyouana 

 Kearfott and described by him under the name taxifoliella Busck. 

 Large series of the latter species were also reared by Mr. J. M, Miller 

 from cones of Pseudotsuga collected in Oregon, California, and Colorado. 

 SisMyouana Kearfott was also reared in considerable numbers from 

 cones of Abies concolor, Ahies sJiastensis, and Abies magnifica collected 

 in California, Oregon, and Colorado. The California and Oregon speci- 

 mens of sishiyouana agree with Kearfott's type in all details. Similarly 

 the several rearings of moths from Pseudotsuga cones in Montana all 

 agree with Busck's type series of taxifoliella. In these two forms we 

 have what appear to be two quite distinct species. The California and 

 Oregon sisTciyouana is nearly twice the size (in adult and pupa) of the 

 Montana taxifoliella. The ground color of the fore wings of the latter 

 form is a rich rust brown with only a slight sprinkling of l)lack scales, 

 while in SisMyouana the brown scaling is much paler and limited to a 

 smaller area near the termen and apex of the wing, the ground color 

 is more suffused with black scales and tlie pale blotches and cross 

 markings a lighter gray white and more sharply defined. In both 

 forms the head and face scales are mixed black and white and the 

 hind wings a smoky brown. 



In Oregon and California the Pseudotsugaiorm. shows considerable 

 variation from the type. The moths are uniformly larger, about half 

 way between the typical taxifoliella and sisMyouana. The wings are 

 slightly narrower and the body more slender than those of sisMyouana 

 from the same localities. The blotches and cross markings of the fore 

 wings are more extended than in the Montana form and less sharply 

 defined than in the typical sisMyouana. The scaling on the face is a 

 uniform pale ochreous and the white scales are absent from the head, 

 also there is much less brown in the ground color than in the Montana 

 taxifoliella. The hind \s^ngs are smoky bro^^^l. This is the form 

 described by Kearfott as colfaxiana. I have compared a large series 

 with his type and they agree in all details. 



Colorado specimens of both the Abies and Pseudotsuga moths differ 

 strikingly from the typical forms of sisMyouana and taxifoliella and 

 also rather markedly from the Oregon and California colfaxiana. The 

 hind wings are much paler, the pale spots and cross markings on the 

 fore wings are more extended and run together until the ground color 

 is largely lost and the moths have a decidedly more grayish appearance. 

 The larger moths reared from Pseudotsuga are the same size and have 

 the same width of fore wing as the average from. Abies. They differ 

 slightly in that they have a faint dusting of yellow along the cell that is 

 lacking in the fore wing of those reared from Abies. The areas near 



