1907.] NATURAL SCIENCES OF PHILADELPHIA. 13 



the seventh the median glands unite, reducing the number to five, and 

 upon the eighth segment but three occur. A pair of rather large 

 glands occur between the antenna below, and there is a small one on 

 either side in front of the middle coxa?. The rostrum is short and stout, 

 with joints 1 and 2 subequal in length. 



Pupa (PI. M, fig. F).— Length, .7 to 1 mm. Color light to a dull 

 reddish brown, Ijecoming darker as the time for moulting approaches. 

 From the front of the head are two short, broad, outwardly curved 

 pencils of white secretion, one on either side of the median line. The 

 body is also more or less whitened by a covering of fine white powder, 

 but there are no Jong waxy filaments; head, thorax and wing pads a 

 little darker than the remainder of the body. Dark spots marking the 

 presence of developing wax glands may be seen as follows: Upon the 

 front of the head two large ones, and back of these two others of smaller 

 size close to the hind margin; on the prothorax a very large lateral 

 gland upon either side, and mesad of each of these four small ones; 

 mesothorax with one lateral and one submedian spot on either side, 

 both small; metathorax with three spots on each side in a line near the 

 hind margin. On the abdomen there are six longitudinal rows extend- 

 ing over the first five segments, and the lateral rows over two or three 

 segments more. 



Winged Female (PI. VII, fig. A). — Length, commonly .7 to 1.2 mm. 

 Color reddish brown with head and thorax black or blackish, legs and 

 antenna? a little dusky. Anterior wings 1.4 to 1.8 mm. in length, 

 slightly smoky, venation normal; posterior wings without transverse 

 nervure. After locating upon the blue spruces the body soon 

 becomes nearly buried in a mass of wliite waxy threads, as in the case 

 of cooleyi. Antenna nearly as long as the greatest width of the head 

 (about .25 mm.), joints 1 and 2 short and subequal, joints 3 and 4 

 also subequal with the fourth a trifle the longer, fifth joint slighth^ 

 longer than the fourth, joints 3, 4 and 5 deeply transversely 

 marked with impressed lines and much enlarged toward the distal 

 ends, and each with a transverse sensorium of moderate size, all the 

 joints robust (PI. VII, fig. B). Legs dusky brown and rather stout. 

 Glands arranged about as follows : a large one on the front of the head 

 on either side at the base of the antenna, and on the posterior margin 

 of the head, close to the median line, another pair of smaller glands; 

 on the prothorax, a large gland patch on the posterior lateral margin 

 that extends a short distance along the hind margin, and a smaller 

 patch on the hind margin near the median line upon either side. Upon 

 the mesathorax, one pair of large submedian glands, and upon the 



