2 ENTOMOLOGICAL NEWS. [Jan., '08 



I attempted to get them to locate upon cottonwood twigs by 

 inclosing them with twigs in a breeding cage, but without suc- 

 cess. 



While it seems probable that the winged migrants establish 

 new colonies somewhere, perhaps upon some different food 

 plant, it is also certain, as in the case of Chcrmcs coloradcnsis, 

 that some of the apterous females live over winter upon the 

 trees, for bark which I removed January 29th, at Grand Junc- 

 tion, was found to have living lice and some eggs. These eggs 

 I was able to hatch in the laboratory, and the young established 

 themselves upon cottonwood twigs that were furnished them 

 and did well. When very numerous, the lice often cause rough, 

 knot-like growths of trunk or branches, much as in the case of 

 Scliizoncnra lauigcra of the apple. 



The Eggs. The eggs are very pale straw yellow, much 

 lighter than any of the Chermes eggs I have seen, and are .023 

 mm. in length by .014 mm. in width. The eggs are not attached 

 but simply entangled by the cottony secretion. 



Young. The newly hatched young are like the eggs in gen- 

 eral color, with legs, antennae and distal end of the long beak 

 dusky, and the eyes bright red. 



Adult Apterous Female. The adult apterous females are 

 also very light yellow in color, the older individuals being the 

 darker. Large females measure approximately .8 mm. long by 

 .6 mm. broad. The size and arrangement of the wax glands or 

 plates are best indicated in the drawing, Plate I, Figs. D and E. 

 The only plates showing on the ventral surface are the mar- 

 ginal ones, while dorsally all the longitudinal rows extend 

 continuously to the eighth abdominal segment. At least they 

 can be so traced in some individuals. The beak is peculiar, in 

 that it may be extended so as to attain, or even surpass, the 

 tip of the abdomen, when it appears to be four-jointed. The 

 rather long basal piece seems to serve as a tube into which 

 the next joint, the real first joint, composed of seven or eight 

 serial pieces, as shown in the figure, may be telescoped. The 

 two distal joints are both quite short. From specimens taken 

 Jnnr i')th, and December I2th, 1906, at Grand Junction. 



Winged Female. Length of fore-wing, 3.50 to 3.75 mm. ; 



