A SYNOPSIS OF THE APHIDIDAE 125 



taken by Dr. Patch on cultivated spiraea in Orono, Maine. These 

 notes are included here as there is no adequate description of this 

 species, the only ones 18 being very meager notes indeed . 



Alate viviparous females. Body rather long and narrow, head 

 normal with no antennal tubercles. Antennae shorter than body, 

 reaching to about the base of the fourth abdominal segment. VI spur 

 the longest segment, followed by III, which is about two-thirds as 

 long. Following III are IV, V, and VI base. The usual primary 

 sensoria are present on V and VI, and the accessory sensoria on VI. 

 The secondary sensoria are fairly large and circular. There are six 

 or seven in an even line along the whole length of III. On IV there 

 may be one or two near the middle, or there may be none. Prominent 

 lateral tubercles are present on the prothorax and on the first and 

 seventh abdominal segments. The cornicles are fairly long, slender, 

 and taper slightly toward the apex. They are from one and one-half 

 to two times as long as the hind tarsi, and subequal to or very slightly 

 longer than the cauda. The cauda is fairly long, ensiform, slightly 

 constricted before the tip. The wings are normal, with the second 

 branch of the third discoidal nearer the apex of the wing than the 

 base of the first branch. 



Measurements : Body length, 1.19 to 1.33 mm. ; width of thorax, 

 0.544 to 0.561 mm.; antennae total, 0.85 to 0.918 mm.; Ill, 0.17 to 

 0.1785 mm. ; IV, 0.136 to 0.153 mm. ; V, 0.1275 to 0.1445 mm. ; VI, 

 base 0.0935 to 0.102 mm. ; VI, spur 0.238 to 0.255 mm. ; cornicles, 0.1785 

 to 0.187 mm. ; cauda, 0.17 mm. ; hind tarsus, 0.102 mm. ; wing length, 

 1.97 to 2.04 mm.; width, 0.748 to 0.782 mm.; expansion, 4.55 mm.; 

 from base of first branch of third discoidal to wing tip, 0.578 to 0.68 

 mm. ; from base of second branch to wing top, 0.17 to 0.255 mm. 



149. Aphis tetrapteralis Cockerell 



Cockerell, 'South. Cal. Acad. Sci., Bull. 1, p. 4, 1902 (orig. desc.). 

 Record. Atriplex canescens tetraptera; La Jolla (Cockerell). 



This species has been observed but once, when described by 

 Cockerell. He writes: "It differs from Aphis atriplices Linn, by its 

 smaller size, mode of life, and shorter cornicles. It seems to be 

 related to Aphis vnonardae Oestlund." In 1916 the author spent 

 considerable time hunting for this species in the vicinity of La Jolla, 

 but in vain. 



is Patch, Edith M., Maine Aphids of the Rose Family. Maine Agr. Exp. Sta., 

 Bull. 233, p. 270, 1914, Aphis spiraecola n.n.; Gillette, C. P., Plant louse notes, 

 Family Aphididae. Jour. Econ. Ent., vol. 3, p. 404, 1910. Aphis spiraeella Schout. 



