Eleventh Eeport of the State Entomologist 293 



Plate IX. 



Fig. I. — The pine-leaf scale-insect, Chionaspis pmifolii (Fitch): 2, the 

 scales on the leaves in natural size : a, leaves not stunted by 

 the presence of the scales ; b^ scale of female of usual form, 

 enlarged; c, wide form of the same, enlarged; d,z. male 

 scale enlarged. (After Comstock.) 



Fig. 2. — The white scale, Aspidiotus nerii Bouche, on an Acacia twig, in 

 natural size: a, the male insect, enlarged; b and c, the male 

 and female scales, enlarged. (After Comstock.) 



Plate X. 



Fig. I The maple-tree scale-insect, Pulvinaria itmumerabilis (Rath- 



von), with extruded egg-masses, on grape, natural size. 

 (After Comstock.) 



Fig. 2. — The same, on osage orange and on maple. (After Walsh and 

 Riley.) 



Fig. 3. — The same : a, a twig with mature female scales and egg- 

 masses, natural size; b, mature female scale from above, 

 enlarged; <:, female scale from below, more enlarged; d', the 

 thread-like setae of the proboscis. (From the Seventh 

 Report on the Insects of Illinois.) 



Fig. 4. — The same : a, a twig with half-grown female scales, in natural 

 size; b, autumnal female scale from above, enlarged; c, the 

 same from beneath; d, the male insect enlarged. (From the 

 Seventh and Thirteenth Illinois Reports.) 



Plate XI. 



The plum-tree scale-insect, Lecanmin ?J2iglandis Bouche 

 in natural size, on plum. (From Garden and Forest.) 



Plate XII. 



Fig. /, the San Jose scale, Aspidiotus perniciosus Comstock, infesting a 

 pear twig ; 2, the scales on a leaf; j, scattered scales on a. 

 pear; 4> a female scale, enlarged; 5, a male scale, enlarged. 

 (From the Cornell University Agr. Exper. Station, and by 

 permission of the California State Board of Horticulture.) 

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