100 APHID NOTES 



long and slender. Nectaries reaching beyond the tip of the abdomen and 

 long and slender. Cauda long and unusually broad. 



Measurements: Length of body, not including cauda, 1.8 mm.; width, 0.67 

 mm. Length of antennal segments: III, 0.5 mm.; IV, 0.48 mm.; V, 0.4 mm.; 

 VI, 0.135 mm.; spur, 0.75 mm. Length of nectaries, 0.55 mm.; length of 

 Cauda, 0.31 mm. 



Alate viviparous female: Antennae reaching beyond the tips of the nec- 

 taries, dark at the tips and the third segment with about 10 to 12 round sen- 

 soria. Nectaries long and slender and reaching beyond the tip of the cauda. 

 Cauda as in the apterous form. 



Measurements: Length of body, 2 mm.; width, 0.75 mm. Length of anten- 

 nal segments: III, 0.6 mm.; IV, 0.48 mm.; V, 0.4 mm.; VI, 0.135 mm.; spur, 

 0.8 mm. Length of nectaries, 0.6 mm.; length of cauda, 0.3 mm.; length of 

 wing, 3 mm.; width, 0.9 mm. 



Aphis lithospermii new species (Plate IX, figs. 10 to 14.) 



A very common species on Lithospermum pilosiim Nuttall in 

 the southeastern part of Oregon during June and July. 



Apterous viviparous female: General color dark green with 4 or 5 black 

 transverse bars on the forepart of the abdomen and one at the base of the 

 nectaries; head black and thorax dusky. Antennae black except at the base, 

 tibia black at the ends and light in the middle. Nectaries and cauda black. 

 Body robust and broadly oval. Nectaries reaching to about one-third the 

 length of the body. Pro thorax with one large finger-like tubercle. Abdomen 

 with two tubercles on each side. One pair is found not quite half way from 

 the thorax to the nectaries and the other pair is foimd between the base of the 

 cauda and the nectaries. Nectaries short, about the same length as the cauda 

 and tapering. Cauda short and tapering to a bluntly rounded tip. Entire 

 body with a sparse pruinose covering. 



Measurements: Length of body, 2.1 mm.; width, 1.38 mm. Length of 

 antennal segments: III, 0.3 mm.; IV, 0.134 mm.; V, 0.154 mm.; VI, 0.11 mm.; 

 spur, 0.198 mm. Length of nectaries, 0.176 mm.; length of cauda, 0.176 mm, 



Alale viviparous female: General color head and thorax black; abdomen 

 green with three transverse black bands just in front of the base of the cauda. 

 Antennae black except at the base, and legs black except the middle part of 

 the tibiae. Body stout, antennae about half as long as the body; third seg- 

 ment with about 9 to 12 irregular sensoria, and the fourth with two on the 

 distal half of the segment. Thorax apparently without tubercles. Abdomen 

 with two pairs of tubercles as in the apterous form but it is necessary to have 

 the specimen turned slightly sidewise in order to make them out. Nectaries 

 short and tapering and about as long as the cauda, which is short, tapering 

 and with a blunt, rounded tip. 



Measurements: Length of body, 1.67 mm.; width, 0.84 mm. Length of 

 antennal segments: III, 0.31 mm.; IV, 0.156 mm.; V, 0.135 nun.; VI, 0.135 nun.; 

 spur, 0.242 mm. Length of nectaries, 0.154 mm.; length of cauda, 0.15 mm.; 

 length of wing, 2.62 mm.; width, 0.95 mm. 



