61 
Putnam's Scale 
{Aspidiotiis ancylus Putnam) 
This is a circular or oval, dark gray or black, scale insect, about 
one-twelfth of an inch in diameter, with a brick-red point at one side 
of the center. It closely resembles the San Jose scale in general 
appearance, but does not present the conspicuous ring and nipple 
structure of the latter, altho the young have usually a nipple and 
a rather indefinite ring. 
It passes the winter but partly grown, but difTers from the San 
Jose scale in the fact that it reproduces by means of eggs laid in 
late spring or early summer. There is but one generation in a 
season. 
It has been found on elm, willow, oak. hemlock, mountain ash, 
Ilex, white birch. Primus, ash, beech, hackberry, linden, maple, 
Osage orange, and water-locust. It is rarely injurious enough to 
require special attention. 
The Walnut or Willow Scale 
{Aspidiotiis jiigJans-rcgicc Comst.) 
This species, altho common on a number of shrubs and shade 
trees, is of little importance except on the willow, to which it is a 
veritable pest. It is easily distinguished from other scales of the San 
Jose relationship by its relatively large size, its diameter being 3 
mm., or an eighth of an inch. The female scale (Fig. 63, a, c,) is 
Fig. 63. Walnut Scale, Aspidiotiis juglans-regia: a, b. female and male scales, 
enlarged; c, male pupa; d, e, male and female scales, natural size. 
circular, flat, with a prominent pink or reddish point at one side 
of the center. The male scale (Fig. 63, h, d) is elongated, with a 
corresponding point near one end. The female passes the winter 
as an adult, and lays her eggs in early spring. 
Treatment the same as that for the scurfy scale. 
