12 John June Davis 



tionally sharp pointed, both in this species and in A. artemisicola. 

 On each abdominal segment is a small transparent spot near the 

 margin, one on each side. Cornicles imbricate and semi-reticulate 

 at the tip; about, or a little more than, twice the length of the 

 style. This species resembles the genus Macrosiphum in many 

 respects. 



Camera lucida drawings of the head, antenna, cornicle and 

 style of winged viviparous female ; and the antenna and cornicle 

 of an immature Aphis on the same slide are shown on Plate II, 

 figs. 26 to 30. 



46. A. rufomaculata Wilson {A. chrysanthemicola Williams). 



" Aphis chrysanthemicola n. sp. No. 55. On Chrysanthemum, 

 Greenhouse, Lincoln, Dec. 30, 1890." 



Two winged and several adult apterous and a few immature 

 individuals on the slide. This is the same as was described by 

 Wilson as A. rufoniaailata.^ 



47. A. cnici Williams. 



"Aphis cnici n. sp. Type No. 51. On Cnicus, War Bonnet 

 Cr., 6/23, '90." 



Three winged viviparous females and three pupae on slide. 



Should this species prove to be distinct, the specific name must 

 necessarily be changed since it is preoccupied by Aphis cnici 

 Schrank. Schrank's cnici seems to be one of the lost species, for 

 I have been unable to find any original note on it since its descrip- 

 tion. Kaltenbach, in his Monographic der Familien der Pflanzen- 

 Iduse, lists it as one of the " lost species " and quotes the original 

 description on page 142, which I herewith copy. 



" 112. A. cnici. Schrank. 

 "Eiformig, etwas niedergedruckt, rothlichbraun ; am Ende des Hinter- 

 leibes eine stumpfe Spitze, kein deutliches Schwanzchen. Die Saftspitzen 

 braunlich oder braun; die Fusse und Fiihlhorner (von der Lange des 

 Korpers) blass mit schwarzen Gelenken; der Saugstachel blass, an der 

 Spitze schwarz. 



" Schrank Fauna boica II. 122. 1239. 

 " Wohnort : Zwischen den Bliithen des essbaren Cirsiums." 

 ^Entomological News, 19: 261, June, 1908. 



264 



