THE CANADIAN ENTOMOLOGIST 323 



thoroughly with scalecide or some other good miscible oil a few 

 days before the buds burst. This substance will kill all the eggs 

 that it covers, but to insure that the egg masses are all covered 

 means that the spray must be forced right through the tree to the 

 farthest twigs and branches on the opposite side, otherwise many 

 egg masses situated on the inner side of these twigs and small 

 branches will not be hit. The introduction of the new spray guns 

 makes it a great deal easier to control these insects than it was a 

 few years ago. It should be remembered that each barrel of 

 scalecide should be diluted enough with water to make sixteen 

 barrels of mixture for the orchard, and also that this substance is 

 very effective against San Jose scale. In nearly every case the 

 scalecide should be used two years in succession to insure full 

 success. 



NOTES ON COCCID^ II. (HEMIPTERA). 



BY G. F. FERRIS, STANFORD UNIVERSITY, CALIFORNIA. 



As at present constituted, the genus Sphcerococcus is nothing 

 more than a convenient dumping-place for a considerable number 

 of species that are but little understood — or it were entirely truth- 

 ful to say not understood at all. The only character that the 

 eighteen or twenty included species are supposed to have in com- 

 mon is that of the absence of hairs on the anal ring. I am informed 

 by Mr. Harold Morrison, who has examined the types of S. casuar- 

 incB Maskell, (the type of the genus), that setse are present on the 

 anal ring of this species, notwithstanding Maskell's assertion to 

 the contrary. In fact, Mr. Morrison is somewhat inclined to be- 

 lieve that this species is nothing more than a species of Antonina 

 and certainly the original description and figures support this 

 conclusion. However that may be, some of the species now re- 

 ferred to this genus indubitably have nothing to do with the 

 genotype and must be placed elsewhere. It is probable that but 

 few of these can be assigned to recognized genera. 



I am here naming new genera for three of the species now in- 

 cluded in Sphcerococcus. One of these, based upon S. pulchellus 

 Maskell, belongs to the group now recognized as the tribe Asterole- 

 caniini of the subfamily Dactylopiinae. The other two, based 



October, 1918 



