COCCIDAE OF OHIO. 4^ 



CHIONASPIS PINIFOLIAE (Fitch). 

 Figs. 34, 35. 



Aspidio'us pi'iifofiae Fitch, 2nd Rep. Ins. N. Y.. p. 488 (18-55). 



Cliionaspis pinifoliaeComsi., Rep. U. S. Dep. Ag. 1880, p. 318 (1881) 



Chionaspis pmifoli'o Cooley. Spec. Bull. Mass. Exp. Sta., p. 30 (1899). 



Scale of female: Snow-white with bright orange or brown exuviae, 

 shape depending upon width of leaf of host, but usually broadened 

 posteriorly and very convex. Length, 3 — 4 mm.; length of exuviae 

 about 1 mm. 



Scale of male: Length, 1 — 1.3 mm. The pale yellow exuvia 

 occupies about one-third the length of the tri-carinate, posteriorly 

 broadened scale. 



Female: Three pairs of thin, striate, well-developed lobes; the 

 median almost circular in outline, entire, separated by about one-third 

 their width, slightly diverging at the apex and joined anteriorly by 

 an arched chitinous process. Inner lobule of second and third lobes,, 

 the larger and subtruncate. The gland-spines are arranged as follows: 

 1, 1, 1, 1, i-3, becoming shorter toward median lobes. The spines on. 

 the ventral surface are short and inconspicuous, situated one mesad 

 the base of the first, second, third and fourth gland-spines respec- 

 tively. Those on the dorsal surface are longer and situated mesad of 

 the corresponding ventral spine. Second row of dorsal pores repre- 

 sented by anterior group of 2-4; third row by 3-5 in anterior and 4-6 in 

 pocterior group; fourth row by 3-7 in anterior and 5-8 in posterior 

 group. Median group of circumgenital gland-orifices, 7-13; anterior 

 lateral, 12-20; posterior lateral, 14-18. The eggs are purplish, ellip- 

 soidal; length 0.25 mm. 



Remarks : Native on various pines and spruces of the 

 United States, especially in the states east of the Mississippi 

 River. Many trees on the Ohio State University Campus are 

 badly infested, appearing' at a distance as if dusted with flour. 



CHIONASPIS SALICIS-NIGRAE (Walsh). 

 Figs. 32, 33, 74. 



Aspidiofus salicis-nigrae Walsh., 1st Rep. Nox. Insects 111., p. 39 

 (1868). 



Chionaspis salicis Comst , Rep. U. S. Dep. Ag., 1880, p. 320 (1881). 



Chionaspis salicis-nigrae Cooley, Spec. Bull. Mass. Exp. Sta., 

 p. 19 (1899). 



Scale of female: Length, 2.5 — 4 mm., broadest near middle, dis- 

 tinctly convex, snow-white. Exuviae .8 — .9 mm. long, yellowish-brown, 

 sometimes almost colorless. 



Scale of male: Length, 1 — 1.2 mm. Slightly broadened posteriorly, 

 with posterior end rounded ; feebly tricarinate. Exuvia varying from 

 brown to almost colorless. 



