THE CANADIAN ENTOMOLOGIST. • 87 



oblique, lobule which is sometimes serrated, and an outer straiglit one, 

 the inner one being larger. Third pair of lobes broad and only slightly 

 produced, with the outer edge serrated. A distinct spine above at the 

 base of each median lobe, and between the median and second lobes a 

 short plate and an obscure marginal gland opening. A large spine 

 above the outer lobule of the second lobe and a smaller one below, and 

 between this lobule and the third lobe a plate and a marginal gland 

 opening. A marginal gland opening at the base of the third lobe, and, 

 outside this lobe, a large spine above and a small one below, followed 

 first by a plate and then by a notch in which is a marginal gland 

 opening. Following this is a spine, one or two plates, and, after a space, 

 the terminal group of about seven plates. Dorsal rows of oval gland 

 openings present. 



Circumgenital glands arranged in five groups: Median, 12 to 19; 

 anterior laterals, 21 to 29 ; posterior laterals, 15 to 22. 



Male. — Unknown. 



This species also belongs to the salicis group, but may be readily 

 distinguished from all others of the genus by the peculiar fusion of the 

 inner edges of the median lobes. 



Habitat. — On Carya from Washington, D. C. 



Chionaspis Lounsburvi, n. sp. 



Scale of Female. — Elongated, sometimes narrow like Mytilaspis and 

 sometimes broadened posteriorly like Chionaspis ; straight, very firm in 

 texture, silvery-white with the exuviae yellowish or brownish. Secretion 

 covering the second exuvia firm and persistent. Scale more or less 

 covered with a brown bloom, which occurs naturally on the surface of the 

 leaves of the host-plant. Length of exuviae about i mm.; total length, 

 2.4 to 3 mm. 



Scale of Male. — Very loosely constructed and fragile ; median keel 

 present, but very indistinct, invisible, in fact, except in the more perfect 

 specimens. White, with the exuvia pale yellowish or colourless. Length, 

 1.2 to 1.5 mm. 



Female. — Elongated, narrowed at the anterior end, but with the 

 abdominal segments of about equal width ; mouth-parts occupying fully 

 one-half the width of the body at the anterior end. Pygidium with a 

 median notch, the two sides being formed by the first pair of lobes, which 

 are large and well developed in some individuals, or small and rudimen- 

 tary in others. Second pair present, third pair obsolete, Median lobes 



