136 Annals Entomological Society of America [Vol. X, 



Young. — About one-third grown. Taken by the writer April 

 25, 190S. The meso- and meta-thorax are quite light and somewhat 

 pinkish or flesh colored; the abdomen is dusky brown, but spotted with 

 white pulverulence much after the pattern of the adult, and especially 

 is this true of specimens about half grown; the head and abdomen are 

 conspicuously darker than the thorax, usually almost black, with four 

 conspicuous white blotches, two lateral, about midway of the abdomen, 

 and two on the median line, one at the meta-thorax and the other at the 

 extreme tip. The posterior half of the pro thorax is also black except 

 upon the middle portion. See figure 20. The beak of very young lice is 

 nearly twice the length of the body. See figure 16. 



Winged Female of Second Generation .—Dezcrihed from specimens 

 bred in the laboratory on sprigs of blue spruce, May 11, 1908. 



General color of body, blackish; a rather conspicuous median white 

 stripe begins on the vertex of the head and extends to the middle of the 

 mesothorax. A continuation of this stripe appears as a white dash upon 

 the middle of the scutellum and as white spots upon the median dorsal 

 line of the abdomen. Upon either side of this row of dots upon the 

 abdomen is another similar row, making three rows of white spots or 

 dashes extending to the region of the cornicles. Back of the cornicles 

 there is also more or less of a white powdery secretion appearing either 

 as spots or transverse lines. On the scutellum the white may extend 

 laterally so as to almost entirely cover this part. There is also some of 

 this white powder along the lateral margins of the thorax beneath the 

 wings, and upon the sides of the abdomen in front of the cornicles, and 

 also behind and beneath these organs. The whole ventral surface 

 is more or less spotted with white. Joints 1, 2 and 6 and the distal 

 ends of joints 3, 4 and 5 of the antennas, are black; all of the tarsi, the 

 distal ends of all the femora and tibice, and the coxae are black; the 

 remaining parts of the legs and the antennae are very pale yellow. The 

 cornicles are very large and black; genital plates and eyes black; beak 

 whitish to the middle, the distal one-half being black or blackish, and 

 reaching to the eighth abdominal segment; wings of medium length, 

 stigma long, black, narrow and parallel sided; stigmal vein straight; 

 the whole surface of the body, including legs and antennae, thickly 

 set with fine hair; eyes' very prominent; ocular tubercles very small; 

 hind tibiae black for fully one-half their length, and all of the tibiae 

 having a short black portion at the proximal end; beak surpassing 

 cornicles. Sensoria rather indistinct and variable in number and 

 distributed about as follows: On distal one-half of third joint, 3 to 5; 

 fourth joint, 1 to 3; fifth joint, 2 to 3; cornicles about .30 high by .40 

 broad at base, mammiform. Length of antennas about 1.30; joints 

 I and II of antennce together .24; III, .54; IV, .26; V, .27; VI, .18; 

 length of body, 3.50; wing, 4.50; hind tibiae, 2.50. The general color 

 when placed in alcohol is a light yellowish brown. The third trans- 

 verse vein with its branches is much more slender than the first and 

 second stigmal veins. See figures 21-23. 



Figure 22, Plate I, was drawn from an antenna plainh^ showing seven 

 sensoria on Joint III, but 3 to 5 were all that could be seen in other 

 examples. 



