— 9— 

 compared with ancylus proper. The scale is smaller, female 

 scale about 4-5 of a mm. in diameter and much darker. The 

 scales do not cluster, as is often the case with ancylus, never 

 more than two or three being found even close to each other. 

 This variety occurs on willow, the individuals usually being 

 found on the tough bark of the small limbs and are practically 

 indetectable without a lens. 



The median lobes are more truncate than in cmcyhis 

 proper and have their ends minutely serrate. The chitinous 

 processes of the first incision are about equal. 



This variation seems to be one which does not bear 

 directly toward any other species, no Diaspidiotus being 

 known, having the ends of the lobes serrate. The variation 

 from the specific form is not more than in many species is 

 frequently encountered without being classed as a distinct 

 variety. In the latter cases however the variation is uncon- 

 stant, while in the present case the variation is found to be 

 uniform, and always the same, constituting a distinct variety. 



ASPiDiOTUS ANCYLUS Putn. var. LATiLOBis Ncwell. 

 New(>ll. W., ("ail. Eiit. Vol. XXXI. 



Scale similar to that of A. ancylus. 



Median lobes of female wide and flaring, without notch 

 on inner margin; outer marginal notch frequently obtuse or 

 nearly wanting; radial structure at base of median lobes on 

 dorsal surface especially prominent. Second lobe rudiment- 

 ary, slightly convex; third lobe as in ancylus. Inner chitin- 

 ous process of second incision slightly larger than outer; 

 chitinous processes on base of median lobes larger and more 

 marked. Ventral grouped glands as in ancylus. Dorsal 

 pores very prominent. 



Male: Length, exclusive of antennae, i to i 1-6 mm.; 

 width of body, 1-4 to 1-3 mm. ; spread of wings, i^f mm. ; length 



