THE CANADIAN ENTOMOLOGIST 23'- 



horn has an oblong indentation, and the base lacks angulation. 

 The saccus is broad but has a Suddenly narrowed tip; the calcar 

 has rather long hairs, but they are rather sparse. The penis is 

 stout and bulbous with spines, and the cornuti of the vesica are 

 three in number, long, moderate and short. 



In Xanthorhoe forsaria the costa of the valvse is shaped as irt 

 atlinensis, but the first horn is much longer, as is also the large one. 

 On the outer side of the large horn is a slight point or rudimentary 

 spine. The large horn is nearer tip of costa than in atlinensis^ 

 also it makes a very slight sinus, and the tip is quite narrow with 

 many fine spines. The sacculus is elongate and pointed but broader 

 than usual, and the base is very wide and rounded. The calcar 

 has numerous fine* short hairs, and the saccus is broad with a 

 stubby, rounded tip, not narrow as atlinensis. The penis does not 

 seernquite sobulbousor so stout as usual, though it is decorated with 

 the usual heavy spines. Probably all the species have the three cornuti 

 on the vesica. My mount of Xanthorhoe forsaria was made from 

 a d^ paratype, which Dr. McDunnough kindly gave me. The 

 shape of the costa of the valvae and the sacculus, and the type of 

 the saccus, seem to give better characters for separation than the 

 penis in this group, though with more material the results might 

 prove different. The above description is based entirely upon the: 

 male genitalia, as I had too few females to spare for slidesv 

 Possibly atlinensis may prove a northern race of forsaria, but 

 I cannot tell without more material, and the sexual characters 

 would seem to keep them apart. 



PHENACOCCUS STACHYOS Ehr. (=P. pettiti Hollinger). 

 In the Canadian Entomologist for August, 1917, the writer 

 described, as new, a mealy bug from Missouri. A short time 

 after the description was published, G. F. Ferris called my at- 

 tention to the apparent similarities that he thought existed he- 

 tween Phenccoccus pettiti Hollinger and a certain Californian species 

 previously described by Ehrhorn as P. stachyos. A slide mount 

 of the California species was submitted to the writer for comparisorL 

 with his series of individuals of the Missouri species. Ferris 

 states that the specimen he submitted to the writer is a topotype 



January, 1918 



