76 MISCELLANEOUS STUDIES 



91. Myzus lycopersici (Clarke) 



Clarke, Can. Ent., vol. 35, p. 253, 1903. Nectaropliora (orig. desc.). 

 Davis, Can. Ent., vol. 46, p. 123, 1914 (desc.). 



Eecord. Lycopersicum esculentum ; Berkeley (Clarke). 



Only once has this species been found in California. Davis in 

 1914 described a species from tomato in Idaho, Montana, and Oregon 

 which he believed to be this one. It may be, and it may not be so. 

 That can never be decided for the types of -Clarke's species are all lost. 



92. Myzus rhamni (Clarke) 



Figure 178 



Clarke, Can Ent., vol. 35, p. 254, 1903. Nectaropliora (orig. desc.). 

 Shinji, Can. Ent., vol. 49, p. 49, 1917. M. rhamni (Boyer) (list). 



Records. Rhamnus calif ornicus; Berkeley (Clarke), Berkeley, March, 1915 

 (Shinji). 



In March, 1915, George Shinji took a species of Myzus from coffee- 

 berry in Berkeley. This fits Clarke's description of Nectarophora 

 rhamni, in so far as the description goes. The author considers it to 

 be the same species as described by Clarke, inasmuch as it was collected 

 in the same locality and on the same host plant. 



Wilson (Can. Ent., vol. 44, p. 156, 1912) describes a species from 

 Rhamnus purshiana in Oregon as M. rhamni (Boyer), listing Clarke's 

 species as a synonym. This is the same species as taken by Shinji 

 in Berkeley, but it is doubtful if it is the species described by Boyer 

 de Fonscolombe. Specimens in the author's collection from Rhamnus 

 in Colorado are determined by Gillette and Bragg to be Aphis rhamni 

 Fonsc. These are certainly different from the coast species, the former 

 being an Aphis closely related to A. euonomii Fabr., the latter a 

 Myzus. From this evidence the author cannot follow "Wilson in 

 placing Nectarophora rhamni Clarke as a synonym of Aphis rhamni 

 Fonsc., considering both as Myzus, but he considers them as distinct, 

 Clarke's species being a Myzus, Fonscolombe 's an Aphis. 



93. Myzus ribifolii Davidson 

 Davidson, Jour. Econ. Ent., vol. 10, p. 294, 1917 (orig. desc.). 



Record. Ribes glutinosum; Eedwood Canyon, Contra Costa County (David- 

 son). 



