February, '14] 



DAVIDSON: PLANT-LOUSE NOTES 



135 



Fig. 7, Myzus fragcefolii; oviparous 

 female; 18, head; 19, cornicle; 20, Cauda. 



Myzus fragcefolii Ckll. 



Oviparous female: General color, pale lemon yellow; older individuals, pale orange; 

 Body spindle-shaped; antenna; reach base of cornicles, pale; two distal joints, dusky, 

 eyes, very dark red; head, paler than the 

 rest of the bodj' with whitish powdery 

 covering; whole body armed with short 

 capitate spines; cornicles long, slender, 

 slightly curving near the apex, cylindrical, 

 white, the tip dusky; cauda, short, taper- 

 ing, dusky. Measurements: Body, length, 

 1.42mm.; body, width, .66mm.; cornicles, 

 .336mm.; cauda, .130mm.; antenna:", joint 

 I, .088mm.; joint II, .051mm.; joint III, 

 .314mm.; joint IV, .200mm.; joint V, 

 .193mm.; joint VI, .080mm.; filament, 

 .387mm. Described from many speci- 

 mens. 



Winged male: Head and thorax, black; 

 abdomen, dark red with sparse whitish 

 bloom and darker cross-bands on the 



dorsum; eyes and antennae, black; dorsum of meso-thorax with white bloom ; frontal 

 tubercles and first antennal joint, porrect; front margin of head prominent; wings, 

 extending far beyond abdomen; stignia, short, rather broad, white; second fork of 

 third discoidal equidistant from first fork and wing apex; fii'st fork equidistant from 

 wing apex and origin of third discoidal; stigmatic vein short, curved deeply; insertions 



white; legs, pale yellowish-brow^l ; knees, tarsi, 

 base and apex of tibia?, black; cornicles, long, nar- 

 row, cylindrical, dusky; cauda, one-third as long 

 as cornicles, dusky, tapering. Sensoria as follows: 

 Antennal III, about twenty small, irregularly dis- 

 posed; anteimal IV, about six similar; antennal V 

 and VI, usual terminal. Measurements: Body, 

 length, 1.20mm.; body, width, .43mm.; cornicles, 

 .32mm.; cauda, .11mm.; wing expanse 5.54mm.; 

 antenna;, joint III, .420mm.; joint IV, .254mm.; 

 joint V, .254mm.; joint VI, .121mm.; filament, 

 .478mm. Described from two specimens. Eggs: 

 oi Black, shining, elongate, size .58mm. x .24mm. 



The sexed forms were observed in Jan- 

 uary and February, 1913, and were the 

 predominant form during these months. 

 The oviparous females far outnumbered 

 the males. Eggs were deposited during 

 these months on the lower surface of the 

 cola; winged viviparous female; strawberry leaves, and these hatched in 

 21, cornicle; 22, cauda. ^^^^^^ ^^ ^^.^1^^^ ^^^^^^ ^^^^ ^^e spe- 



cies was observed to infest leaves and tender stalks of cultivated 

 strawberries. 



Fig. 8, Amphorophora rubi- 



