PLANT-HOUSE MEALY BUG. 261 



imen merged with the edge ; the feet were very slender and 

 threadlike. Its length was .15, and its width .10 of an inch. 



The young (PI. 1, fig. 5, magnified ; 5a, an antenna, enlarged,) 

 were discovered about the 15th of November, moving over the 

 surface of the leaves, or hiding under the bodies of the females 

 or the lifeless scales. They are thin and flat, scalelike, and of 

 a light reddish-brown color. The median region of the body is 

 raised, and on the large, broad head are two prominent eyes. 

 The pro thoracic (or second segment from the head,) is three 

 times as long as the succeeding one. There are eight abdom- 

 inal segments ; from the terminal one arise two long filaments, 

 being one-half as long as the body is wide, springing from two 

 rather large tubercles, with a deep sinus between. Situated 

 between these two tubercles is a circular, flattened tubercle, 

 from which arises a short, hairlike filament one-half as long as 

 the others. The antennas are 8-jointed, the terminal joint giv- 

 ing rise to three large hairs. The legs are rather long, equal- 

 ling the antennse in length, and also of about the same length as 

 the anal filaments. 



The Plant-House Coccus. — (PL 1, fig. 3, magnified.) This 

 well-known pest is often called the " mealy bug." In form it 

 closely resembles the young of Aspidiotus and Lecanium, but 

 measures a tenth of an inch in length ; and reasoning from this 

 fact, it is evidently lower in the scale than either of those two 

 genera. It was described by Linnseus under the name of Coccus 

 adonidum, and has been introduced from Europe into our plant- 

 houses, where it is a great pest. The body is long, ovate, con- 

 sisting of fourteen well-marked segments, counting the head as 

 one ; the sutures are very distinct, especially on the sides. It 

 is covered with a mealy substance, white and cottony, with long, 

 cottony filaments on the edge of the body, the two terminal ones 

 being often half as long as the body, and sometimes still longer. 

 The young are not so wide as the adults, the latter becoming 

 broader and flatter with age. When about to lay its eggs, it 

 adheres by the long, slender beak to the surface of the leaf, and 

 secretes from the abdomen a large, cottony mass, which sur- 

 rounds and partially covers the end of the body, and encloses 

 the pale orange oval eggs. 



It is found to be especially injurious to the camellia, hiding 

 about the buds, to the azalia, oranges, lemons and similar plants. 



