50 OHIO STATE ACADEMY OF SCIENCE. 
Female: Median lobes broad, short, rounded, entire or serrulate. 
Inner lobule of second and third pairs larger than outer, sometimes 
serrulate. The gland-spines are arranged as follows: 1, 1-2, 1-2, 1-3, 
4-6. In this species there are two kinds of dorsal pores. Accompanying 
the anterior groups are smaller circular pores, also grouped. Oval 
dorsal pores; third row with 6-9 in anterior and 5-8 in posterior group; 
fourth row with 6-10 in anterior and 7-10 in posterior group. Median 
group of circumgenital gland-orifices, 21-36; anterior lateral, 31-45; 
posterior lateral, 28-32. 
Remarks: The Willows (Salix) are the usual hosts of this 
species, although it is reported from Liriodendron tulipifera, 
Populus sp., Amelanchier canadensis, and two species of Cornus. 
About 75 reddish-purple eggs are to be found under a seale dur- 
ing the winter, which hatch about the first of June. 
CHIONASPIS SYLVATICA Sanders. 
Figs. 64, 65. 
Ch. sylvatica Sanders, Ohio Naturalist, IV, 4, p. 95 (1904). 
Scale of female: Length, 1.5—2mm., somewhat convex, very 
irregular in shape, sometimes elongated and rounded posteriorly, and 
sometimes decidedly broadened and truncate posteriorly, giving it a 
deltoid shape; dirty-white to light-buff. First exuvia persistent, buff; 
second exuvia brown. 
Scale of male: Length .6—1mm., white, strongly tri-carinate with 
parallel sides. Exuvia very small, delicate, semi-transparent covering 
about one-fifth of the scale. Commonly found on the leaves of its host. 
Female: Oval in outline, with third, fourth and fifth lobes anter- 
jor from the pygidium prominent. Median lobes fused to near the tip, 
diverging widely to rounded tips, then truncated obliquely toward the 
second lobes; serrate or crenulate on lateral margins. Inner lobule 
of second lobe serrate, produced on inner margin to a rounded tip; 
outer lobule reduced, triangular, sharp-pointed, entire. Third lobe 
slightly produced, serrate. On median line, a chitinous band extends 
anteriorly to base of median Jobes, expanding to a bulb-like thickening. 
Chitinous bands extend obliquely toward this from outer margins. 
Second lobes slightly thickened on inner margins. The gland-spines 
are arranged as follows: 1, 1, 1, 1-2, 4-6, the first short and blunt. 
Second row of dorsal pores represented by 1-2 in anterior group; third 
row by 3-4 in anterior and 4-5 in posterior group; fourth row by 3-4 in 
anterior and 5-7 in posterior group. Median group of circumgenital 
gland-orifices, 7-10; anterior lateral, 15-20; posterior lateral, 14-18. 
Remarks: This seale has been found on Nyssa sylvatica, at 
four widely separated locations in Southeastern Ohio; Sugar 
