SANBORN : KANSAS APHIDID.K. 79 



0.07 mm. ; III, 0.72 mm. ; IV, 0.61 mm. ; V, 0.54 mm. ; VI, 

 0.14 mm.; VII, 1.00 mm.; total length, about 2.27 mm., or 

 about one and one-half times the length of the body. Sensoria 

 circular, about fourteen on the third joint, none on the fourth, 

 the usual distal one on the fifth, and about six of unequal size 

 at the distal end of the sixth. Eyes very dark red ; ocular 

 tubercles prominent ; ocelli prominent and bordered with 

 black. Beak black at the distal end and paler proximally. It 

 extends a little beyond the mesocoxse, being 0.54 mm. long. 



Prothorax and thorax pale brown. Wings hyaline ; discoid- 

 als black, costals and stigma light brown. Breadth of stigma, 

 0.16 mm. ; length, 0.79 mm. Total wing expansion, 6.52 mm. 

 Legs hirsute, black, blackest at the articulations ; long in pro- 

 portion to the body. 



Abdomen brownish green. Honey-tubes black, cylindrical, 

 imbricated, and 0.68 mm. long, being about four times the 

 length of the tarsum. Style black, hirsute, slender, and rounded 

 at the tip; length, 0.32 mm., being about one-half the length 

 of the honey-tubes. Total length of the body, 1.80 mm. 



This form was taken May 5, on the cultivated tomato. It is 

 sporadic in habit and feeds on the ventral side of the leaves. 



Macrosiphum pisi Kalt. Plate XV, fig. 80. 



Head dark brown. Antenna^ black and hirsute ; length of 

 segments: I, 0.18 mm.; II, 0.11 mm.; 111,0.99 ram.; IV, 

 0.81 mm. ; V. 0.73 mm. ; VI, 0.16 mm. ; VII, 1.09 mm. ; total 

 length, 4.15 mm., extending about 1 mm. beyond the abdomen. 

 Sensoria circular, and of various sizes ; about twenty-five on 

 the third joint, none on the fourth, the usual one present near 

 the distal end of the fifth. At the distal end of the sixth is a 

 cluster of about six or eight small circular sensoria, which are 

 closely connected with a large one situated in the same place. 

 Eyes black ; ocular tubercles red. Beak brownish, becoming 

 black at the distal end, about 0.54 mm. long, extending about 

 half-way to the mesocoxse. 



Prothorax dark brown ; thorax dark brown. Wings hyaline, 

 venation black; stigma pale brown, 0.81 mm. long by 0.14 

 broad. Total wing expansion, 6.35 mm. Legs hirsute, black 

 except the proximal part of the femora, which is light brown. 



Abdomen light brown. Honey-tubes black, imbricated, cyl- 



