COCCIDAE OF OHIO. 61 



most dangerous scale insect then established in Illinois. As far 

 as we have observed it has not becoine a pest in Ohio, although 

 found in various localities and on several host§. It can be dis- 

 tinguished from the San Jose Scale by the much lighter color 

 of the scale and the orange-red exuviae ; also the ' ' dot and ring ' ' 

 is not noticeable. 



ASPIDIOTUS GLANDULIFERUS Ckll. 

 Fig. 8. 

 "Aspidiotus glanduliferus Ckll., Ohio Naturalist, ii, p. 287 (1902). 



Scale of female: 2 mm. diam., slightly convex, blackish, with 

 large sub-central to sub-lateral orange-ferruginous or almost vermillion 

 exuviae, readily exposed' by rubbing; removed from the bark, a con- 

 spicuous white patch is left. 



Scale of male: Oval, broad, with covered exuvia and a white dot 

 and ring. 



Female: Broad oval with deep constriction between head and 

 thorax. Color, bright orange; caudal margin stained with dark red 

 brown. Median lobes very large, broad, scarcely produced; second 

 lobes similar but smaller and more or less serrate, close; third lobes 

 represented by small angular prominence. Chitinous thickenings of 

 interlobular incisions, short and straight, subequal, but the inner the 

 larger. Plates, spine-like; two between median lobes, two caudad of 

 first incision and two or three slightly branched caudad of second 

 incision. Spines quite large; on the dorsal svirface, a spine is borne by 

 the first, second and third lobes respectively; the fourth spine at about 

 one-fourth, and the fifth at one-half the distance to the penultimate 

 segment. On the ventral surface, the spines are mesad of the corres- 

 ponding dorsal ones, except that they are lacking on the median lobes. 

 Five groups of circumgenital gland-orifices; median, 4-5; anterior 

 lateral, 15-18; posterior lateral, 7-10. Dorsal pores very numerous in 

 four series; the first (below first interlobular incision) of 3 in a row; 

 the second of about 17, and after*a short break, 9-10 more; the third 

 of over 30; the fourth of about 11. Anal orifice very small, level with 

 second dorsal pore of first row. 



Remarks : This scale was discovered in February, 1902, on 

 the branches of Pinus sylvestris on the Ohio State University 

 Campus, by the author, and sent to Prof. Cockerell, who described 

 it as A. glanduli ferns, because of the large number of beautifully 

 arranged dorsal pores in the last segment of the female. Since 

 that time the author has found this scale on Pinus virginiana and 

 Tsuga canadfiisis on the 0. S. IT. Campus. 



