496 JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 3 



confirmed the writer's determination. I believe this species has not 

 heretofore been reported from the United States. 



The following descriptions were made from specimens collected 

 at Urbana, 111., July 15, and August 7; LeRoy, 111., June 22; and Au- 

 rora, 111., September 24. 



Winged viviparous female. — Head (PI. 32, fig. 22) and thorax dark, abdomen pale 

 green with a reddish area around each cornicle. Eyes black. Antennae on frontal 

 tubercles, typical of the genus Myzus; subequal to or slightly longer than the 

 body; filament VI longest, it being nearly J^ longer than III, III nearly 1-3 longer 

 than IV which is subequal with segment V, base VI 1-4 length of the filament or 

 1-3 length of III; 11-17 circular sensoria, usually more or less in a row on segment 

 III, the usual ones at ends of V and base VI (in one specimen there were two small 

 sensoria on segment IV); shghtly imbricated, bare, and dusky to blackish except- 

 ing the two paler basal segments and basal end of III. (PI. 32, fig. 26.) Wings with 

 dark and conspicuous venation, the first and second discoidals branching at a little 

 less than 2-3 the distance from where the third branches, to the tip of wing. (PL 

 32, fig. 25.) Legs pale excepting tarsi which are black. Cornicles pale, reaching 

 to or slightly beyond tip of style, narrowest in middle and the tip very slightly 

 swollen. (PI. 32, fig. 23.) Style pale, tjqaical of the genus, and about 1-2 the length 

 of the cornicles. (PI. 32, fig. 24.) 



Measurements. — Length of body, 1.27 mm.; width, 0.55 mm.; length of wing, 

 2.22 mm.; width, 0.80 mm.; antenna, I, 0.065; II, 0.055; III, 0.375; IV, 0.277; 

 V, 0.277; VI, base, 0.130; VI, filament, 0.49; total, 1.669 mm.; cornicle, 0.275 mm.; 

 style, 0.130 mm.; hind tarsus, 0.114 mm. 



Wingless viviparous female. — Body cream colored to pale brownish yellow, the 

 abdomen having also a distinct but very slight greenish tint. A small red area 

 at the base of and around each cornicle. The red eyes of the embryonic aphids 

 within the body are visible through the dorsal abdominal wall of the mature female. 

 Eyes brownish black to black. Antennae concolorous with the body excepting the dusky 

 tip of IV, and also tip of V and all of VI, which are black; slightly longer than 

 length of body, relative antennal lengths as in winged. (PI. 32, fig. 27.) Legs pale 

 or with a very pale brownish tint, and the tarsi black. Cornicles and style as in 

 the winged. 



Measurements. — Length of body, 1.6 mm.; width, 1.05 mm.; antenna, I, 0.075; 

 II, 0.57; III, 0.407; IV, 0.277; V, 0.277; VI, base, 0.130; VI, filament, 0.489; total, 

 1.712 mm.; cornicle, 0.358 mm.; style, 0.135 mm.; hind tarsus, 0.114 mm. 



*M. rihis Linn.: Oestlund, Bull. Geol. and Nat. Hist. Surv. Minn., 

 No. 4 (1887), p. 74. Common throughout the state, and frequently 

 a pest on the cultivated currant. 



*M. rosarum Walk.: Oestlund, 14th Ann. Rep. Geol. and Nat. 

 Hist. Surv. Minn. (1886), p. 30 {M. potentillce) . A rose pest commonly 

 found in Illinois on roses in greenhouses. They colonize the tender 

 shoots, sometimes completely covering them and naturally killing 

 the growth. 



{To be concluded) 



