298 STATE HORTICULTURAL SOCIETY. 



eueil by ihc 8imu fiiu<;a8 which after a year or two follows the attacka 

 of this insect and completes the clistigurement and destruction of the 

 tree. The scale is a very handsome one, as scales go. The form is 

 hemispherical, tending to conical in the center, 2.5 to i'""" in diameter ^ 

 surface highly polished, though not smooth, being indented with more 

 or less distinct, shallow, crenulated grooves, radiating from the center 

 to the margin; general color black, or very dark brown, with a longi- 

 tudinal dorsal band of bright sealing wax, red and fine streaks of red 

 alternating with broader ones of paler brown to form a border. When 

 detached from the twig during winter or early in the spring, the under 

 side will be fouud slightly concave, and, occupying the center, is the 

 still quite well-defined body of the female, surrounded by a brown 

 jelly substance which fills the remainder of the shell, across which four,, 

 or sometimes six, diminished white thread-like lines extending to the 

 edge of the scale, have the appearance of legs, and would seem to 

 assist in keeping the scale in place. When lifted carefully from the 

 posterior end, the long hair-like beak can be distinguished with a 

 strong lens, and is capable of being drawn out to a length of 2"^™ . 



On May 2, my attention was called by a friend to a young Lombard 

 plum in his garden, which exhibited the worst case of attack yet seen — • 

 probably the unchecked development of several seasons. The twigs 

 and smaller branches were absolutely incrusted on all sides with the 

 Ooccids, presenting to other than entomological eyes a repulsive spec- 

 tacle. Even at this late date segregation had not taken place. By the 

 20th of the month, however, the eggs were fully formed and every scale 

 was crowded with them. The egg is broad oblong in form, 0.5™™ in 

 length, pale yellow in color, and in the mass quite free and granular. 

 Hatching began June 10 and continued for nearly a month. The young 

 larvte was the largest species yet observed, very flat, uniformly pale 

 yellow, the carapace being indicated by a very thin lateral rim. The 

 legs were rather long and well developed. Antenn.ie five or six-jointed» 

 one-half of the length of the body. By July 15 hatching was com- 

 pleted, and in the meantime, those first hatched, of which a part were 

 separated and kept on fresh twigs in the rearing jar, had nearly all be- 

 come stationary on the leaves and transformed to male pupse. Twigs 

 brought me from the tree at this date had the foliage covered with the 

 young in ail stages, the majority being still in a state of great activity,, 

 resembling in general appearance and in the peculiar wavy motion 

 when crawling, a myriad of small Tingitids. The sexes were undis- 

 tinguishable. The mature larval scale is about 2™™ in length, slightly 

 convex, of a translucent greenish-white color. Two converging carinte 

 enclose a narrow flat dorsal space, from which a border, divided into 



