i8 John June Davis 



Length of body, 2.0 mm ; width, 0.95 mm ; length of cornicles, 0.28 mm ; 

 style, 0.19 mm. 



Camera lucida drawings of the head, antenna, cornicle and 

 style are given in Plate IV, figs. 63-65. The fourth specimen on 

 this slide may be a male, although I cannot distinguish any of the 

 male organs. It is a smaller individual than the viviparous, 

 measuring only 1.5 mm in length and 0.65 mm in w^idth. The 

 antennae are shown on Plate IV, fig. 66. 



Another slide of this same species bearing the same data as 

 above slide but numbered " 84 " was also examined. It contains 

 three winged, one probably a male. The two winged viviparous 

 females agree with the ones above described except that they bear 

 only 22 to 25 sensoria on III. The winged male ( ?) on this slide 

 has 32 to 34 tuberculate sensoria on III, 4 to 9 on IV, and i, not 

 including the usual distal one, on V. This is a smaller individual 

 than the viviparous female. 



66. A. rumicis Linnaeus [?]. 



67. A. salicicola (Thomas). 



68. A. saniculae Williams. 



" Aphis saniculae n. sp. Type No. 86. On Sanicula, War 

 Bonnet C, 6/21, '90." 



Three winged and three pupae on the slide. 



Winged viviparous female: Antennae barely reaching to base of cor- 

 nicles; one antenna has segments III and IV coalesced, and in two others 

 these segments are partially coalesced; segment III bears 21 to 27 circular, 

 irregularly placed sensoria, IV with 9 or 10, V with 4, not including the 

 usual distal one, and VI base with the usual distal ones. On each side 

 just posterior to the thorax and also on each side of the segment posterior 

 to the cornicles is a prominent fleshy tubercle. Thoracic tubercles also 

 prominent. Antennal measurements as follows : 



270 



