70 Journal New York Entomological Society. [Voi. xi. 



semi-cylindrical about the middle and ending posteriorly rather abruptly ; larval skin 

 of the same size, shape and color as that of the female. 



Adult Jlfale (Plate VII, Fig. 20). — The adult male is about 1.2 mm. in length 

 and colored as follows : Head white, with purplish tinge ; eyes dark purplish ; thorax 

 brownish ; abdomen purplish ; wings smoky, iridescent ; legs'light brown ; antennae 

 very light, about. 65 mm. in length and ten-segmented, formula, 3 (4, 5, 6) (7, 8) 9, 

 10, 2, 1. The wings are about as long as the entire body, very light colored and mi- 

 nutely haired. The legs are long and slender, slightly hairy as indicated in the figure ; 

 claw long and slender, slightly curved, with a pair of long knobbed hairs dorsally, and 

 a pair of shorter digitules ventrally. 



The Young Alalc Larva. — The young male larva is similar to that of the female, 

 hence needs no description. 



Male Larva, First Moult. — At the first moult the male larva still has the same 

 form as that of the female, but during this stage it grows considerably larger than 

 that of the female of the corresponding stage. 



Pupa of J\f ale. — After completing its external scale, the larva changes to the 

 pupa state, remaining in the larval skin until antenna;, legs and wings show quite 

 plainly in their development, when the larval skin is shed together with the mouth- 

 parts, and the pupa is complete. 



Finally the adult male is formed and after lying quietly in place under the 

 scale, which has served as a case for all of the above transformations, for some time, 

 it emerges from the anterior part of the scale, pushing off the larval skin in its 

 exit. 



Habits. — The females are usually found singly on the under side 

 near one margin of the needles of the red fir {Pseudotsuga taxifolia), 

 although I have found several on one needle and have also found them 

 thickly massed about the base of the needles of Abies magnifica, from 

 high altitudes. The males are usually found singly on a needle, though 

 more often than with the female, several are found on the same needle. 

 Occasionally males and females are found together. 



I have found the adult female throughout the entire year, but 

 specimens in the gravid state were found in the Stanford arboretum in 

 January, February, March and December, 1901 ; near Usal. Mendo- 

 cino Co., July, 1901 ; at Shasta Camp, Mt. Shasta, August 19, 1901, 

 and at Dunsmuir, Siskiyou Co., August 25, 1901. 



Males in the young stages were found in Mendocino Co., through- 

 out July, 1901 ; at Shasta Camp, Mt. Shasta, August 19, 1901 : at 

 Dunsmuir, Siskiyou Co., August 25, 1901. A few empty scales were 

 found at each of these places. I found the young males on trees in 

 the Stanford arboretum in Oct. and Nov., 1901, and dissected out 

 several perfect males Nov. 15, 1901. They were very numerous 

 about Dec. 1, but by Dec. 24 were very scarce. 



