APPENDIX. 255 



neal. The identity of D. coccus with the cochineal is 

 thoroughly established by the fact that there is a short 

 Latin description coming before the citations of syn- 

 onymy, while there follows later a full account in 

 Italian." 



GENUS PSEUDOCOCCUS (page 176). 



" This name must evidently be used for the genus 

 called Dadylopius by authors. It was based on the 

 common mealy-bug and the cochineal the latter being, 

 as we have just seen (see Dactylopius), already pro- 

 vided with a generic name. The species first cited by 

 Westwood is Coccus adonidum, and it is evident from 

 the context that he meant the mealy-bug, C. adonidum, 

 etc., of Geoffrey (see also ' Spoil's Encycl.,' vol. i, 

 p. 699, 1882). I have not been able to find where 

 Trechocoryx, Curtis (cited as a synonym by Berlese), 

 was published, but suppose that it was later than 

 Pseudococcus" (Cockerell, 'Ann. Nat. Hist./ ser. 7, 

 vol. ix, 1902). Should this change remain valid, 

 Phenacoccus, Ckll.,* must be substituted for those 

 insects hitherto placed in Pseudococcus of Signoret and 

 other authors, but not of Westwood. 



GENUS RIPERSIA (pages 182, 190, 192). 



Of the five species described in this work, R. ter- 

 restris and R. halophila are, as already pointed 

 out, aberrant species. Cockerell (see reference, 

 p. 191) doubtfully refers terrestris to the genus 

 Rhizsecus of Kiinckel, and states that it "has in 

 common with Eliizsecus falcifer (Kiinck.) the peculiar 

 elongate shape, the five-segmented antennas, the elon- 

 gated mentum, and the prominent caudal tubercles. 

 . . . The terminal segment of the antenna has not 



* Cockerell, 'Entomologist/ vol. xxxiii, p. 87. 



