22 PAPERS ON COCCIDiE OR SCALE INSECTS. 



practically hyaline; median pair of lobes together 0.036 mm. in 

 diameter; incisions normal; paraphyses nearly wanting, represented 

 by mere points of chitinization; plates very little exceeding lobes, 

 not A^er}' strongly developed but of the general Hemiberlesia type, two 

 median narrow, two broader first notch, then three broad followed by 

 two or three simple plates, all plates save last being fingered at tips; 

 spines normal ; anal opening large, nearly ecpaling in size one median 

 lobe, one and one-half lobe^s length distant from base of median lobes; 

 paragenitals scattering, linearly arranged, 0-1, 4-7, 4-6; dorsal pores 

 very few, scattering; basal thickenings not prominent, but slightly 

 chitinized, divaricated ventral thickenings not extending beyond anal 

 opening. 



Type. — Bureau of Entomology No. 14135, on the ground laurel 

 or trailing arbutus (Ejngsea repens), Chain Bridge, Va. (near Wash- 

 ington, D. C), collected by J. G. Sanders, May 6, 1906. Collected 

 also on the same food plant. Sugar Grove, Ohio, by Bertha C. Hite, 

 and donated by Mr. J. G. Sanders. 



Note. — This species is evidently related to latanise.oi Signoret, but 

 is a smaller species and differs in the notable and peculiar chitiniza- 

 tion of the median lobes. It presents considerable variation, some of 

 the smaller or incompletely developed specimens of the last stage of 

 the female' showing less chitinization and approaching rather closely 

 in superficial appearance to townsendi, and it might easily be deter- 

 mined as this latter species. Its host-plant and occurrence in wood- 

 lands indicate that it is a species native to North America. 



ASPIDIOTUS (HEMIBERLESIA) MITCHELLI n. sp. 



(Plate V, fig. 1.) 



Scale of female: Length, 1.5 mm.; subcircular to broad oval, 

 strongly convex, and of the general camellix type; secretionary mat- 

 ter rather dense, color dull yellowish, due chiefly to the extraneous 

 matter taken up from the surface; exuviae yellowish brown, near the 

 anterior end usually covered. Ventral scale a distinct white floccu- 

 lent patch, thinnest at the center. 



Scale of male: Similar in general appearance to that of the female, 

 but of the normal elongate shape. 



Adult female: Normal top-shaped, 0.75 mm. in diameter; in bal- 

 sam hyaline; anal plate a little more yellowed than body, broad, not 

 produced; three pairs of lobes; median lobes truncate, not converg- 

 ing, with two lateral shoulders, separated by a lobe's width, relatively 

 much smaller than the lobes of camellise; second lobe minute, spear- 

 shaped, often with outer lateral shoulder; third lobe narrow, spini- 

 form; thickenings of first and second incisions present, subequal, and 



