.206 Maine Agricultural Experiment Station, 1919. 



two-fold one, — the direct damage due to its feeding habits, and 

 its indirect but possibly even more serious harm of serving as 

 a carrier of potato disease.* 



As there are, at present, no items concerning M. rosae in 

 Maine which are different from those available in publications 

 from other sources ; and as M. solanifolii has already appeared 

 in several bulletins of this Station, the present account will con- 

 cern chiefly the third pink and green aphid of the rose which is 

 here described as a new species though it may prove to have 

 an old world name when its geographical distribution and food 

 plants are better known. 



Macrosiphum pseudorosae n. sp. 



Alate viviparous female : General color polished rose red 

 or green. Beak short and stout. Antennae black, so heavily 

 pigmented that it is difficult to prepare a mount which shows 

 the distribution of the sensoria ; III with 14 more or fewer sen- 

 soria in a row extending usually about five-sixths its length ; 

 IV without sensoria; the relative lengths of segments III to VI 

 may be indicated; 13, 11, 8, 2+13. Fore wing with veins 

 slender and about uniform. Second joint of ist tarsus exclud- 

 ing claw about three-fourths length of base of VI. Cornicle 

 deep black, usually not much shorter than III or anal vein of 

 fore wing, though considerable variation is possible, and reticu- 

 lated for about one-fifth its length. Cauda yellowish. 



Apterous viviparous female : General color same as in the 

 alate female, both color varieties being common. Antenna with 

 single row of sensoria extending about half the length of III, 

 sometimes farther. (See also rernarks on reared individuals 

 p. 208). 



Descriptions of both of the foregoing are from wild rose 

 material collected July 19, 1918 by Mr. George Blodget. Co- 

 type slides in the collection of the Maine Agricultural Experi- 

 ment Station, 173-18 and 176-18. 



*Investigations on the Mosaic Disease of the Irish Potato by E. S. 

 Schuhz, Donald Folsom, F. Merrill Hilderbrandt and Lon A. Hawkins. 

 Journal of Agricultural Research, Vol. XVII, No. 6. Washington, D. 

 C. Sept. 15. 1919. 



