162 ASTEEOLECANIUM OECHIDEARUM. 



above name. On carefully studying the description and 

 the excellent figures which he gives I have come to the 

 conclusion that the species which he had before him 

 was the curious fringed aphis, Ceratapliis latanise of 

 Boisduval. Dr. D. Sharp, who has, jointly with Miss 

 A. Embleton, paid considerable attention to the 

 synonymy of this remarkable coccid-like insect, informs 

 me that he has " obtained satisfactory proof that 

 Westwood's insect is Cerataphis latanidB." To com- 

 plicate matters Westwood added to his illustrations 

 Signoret's * figure of the larva of Asterolecanium 

 aureum, which, needless to say, has nothing to do with 

 the insect in question.] 



GrENUS DACTYLOPIUSf (Costa). 



(Plates LXIV, LXV, and LXVI.) 



To this genus belong the destructive coccids known 

 as " mealy bugs ; " two of the most characteristic 

 species being Dactylopius citri, Risso, and D. longifilis, 

 Targ.-Tozz. In these insects the body of the female is 

 clothed with a thick, white, mealy secretion, but leaving 

 the segmentation distinct; and the margins of the 

 body are furnished with a series of equidistant, white, 

 waxen appendages, which are longer at the anal 

 extremity than at the sides. In 1). walkeri, Newst. 

 (PL LXV, fig. 1 a), the marginal appendages coalesce 

 at the sides and in front, those of the latter forming a 

 large projecting mass sometimes equalling half the 

 length of the insect. D. pulverarius, Newst. (PL LXVI, 

 fig. 4), and D. liibernicus, Newst., are only slightly 

 "mealy," and there are, apparently, no caudal or 

 marginal appendages. The three first-named species 

 are active up to the period of parturition, when they 

 secrete their loose, cottony, or flocculent ovisacs, but do 



* ' Essai/ p. 74, pi. i, fig. 17. 

 f See Appendix. 



