APPENDIX. 199 



of the body terminated by a string of minnte trans- 

 parent glands, from which a clear disc of wax-like 

 substance is secreted. This disc is striated and 

 slightly fimbriated. It entirely surrounds the insect, 

 and hides the antennas and legs below. In the Spring 

 of the year, two or three pale folds occur across the 

 dorsum of the insect. 



Antennas very short ; 4-jointed, the first and second 

 joints nearly equal ; the third the longest, and about 

 double the length of the second. The fourth joint 

 ends in a considerable nail, which, added to the rest, 

 makes the whole joint nearly as long as the third. 

 The front is furnished with two short projections or 

 horns, the use of which is unknown. Eyes very 

 minute ; brown. Legs very short, and normally formed 

 like Aphis ; ending with the usual tarsus and two 

 claws, without the capitate hairs to be seen in coccus. 



Rostrum about one fourth the length of the body. 

 Cauda tuberculate, with two small papillae. The 

 underside is paler, and mottled with brown. 



The young, born from the above insects, are much 

 less coccus-like, and do not greatly resemble their 

 parents. After a short time they moult, and become 

 of a pale, ochreous green colour. The wax glands 

 soon after show themselves at the circumference of 

 their bodies, and the growth of the disc is rapid and 

 very interesting under the microscope. 



Viviparous winged female. 



Inch. Millimetres. 



Expanse of wings 0'160 4*06 



Size of the body 0-0700X 0-040 177xl'01. 



Antennas O035 0*88. 



The imago apparently is very rare, for only three 

 mutilated specimens are at present known. It has 

 not yet been taken in England ; but I have been able 



