AET. 20 



THE APHID GENUS AMPHOROPHOEA MASON 



47 



as protruding, the hairs are less conspicuous, and the antennal 

 tubercles are slightly larger. 



Takahashi has described AmpJiorophora sonchifoliae as a new 

 species on Sonchus arvensis. He says, "closely related to A. oleraceae 

 (v. d. Goot), from which it differs in the more slender cornicles." 

 He says the cornicles of the alate form are eight times as long as 

 wide, while those of the apterous form are seven times as long as 

 wide. I have compared apterous specimens sent by Takahashi 

 with metatype specimens of oleraceae v. d. Goot. While there are 

 some slight differences, I can not at present consider the two as 

 distinct. (See discussion on p. 4.) In the tables of measurements 

 given below I have separated those of sonchifoliae from oleraceae 

 for the benefit of those who have not seen specimens. 



Alate viviparous female (oleraceae v. d. Goot). — Antennae about 

 the same length as the body, dark, hairs very inconspicuous (more 

 so than in cosmopolitana) , numerous rather large, but not strongly 

 protruding sensoria on III, IV, and V. Antennal tubercles small, 

 but somewhat larger than in cosmopolitana. Beak reaching about 

 to second coxae. Small prothoracic tubercles. Abdomen bearing 

 a middorsal dark area and lateral dark patches, these having a 

 tubercle and spines as in cosmopolitana. Cornicles of moderate 

 length, somewhat swollen, the tips imbricated, not reticulated. 

 Cauda constricted, three to four sets of hairs. 



Apterous viviparous female (oleraceae v. d. Goot.) — Antennae 

 slightly longer than body, light colored, tips of segments darker, 

 hairs very inconspicuous, III, IV, and V with large, nonprotruding 

 sensoria. Antennal tubercles of moderate size. Beak reaching 

 beyond second coxae, nearly to third. Cornicles short, moderately 

 swollen, the tip imbricated, not reticulated. Cauda strongly con- 

 stricted, three sets of lateral hairs. 



