ART. 20 



THE APHID GENUS AMPHOROPHOEA MASON" 



25 



No. 9155, described above, was taken on Sonchus asper January 

 24, 1900, District of Columbia. No. 5591, 3/2, was taken at Fair- 

 bury, 111., on Sonchus oleracea on October 15, 1894, along with alate 

 viviparous females. 



Apterous oviparous female. — Antennae about the same length as 

 the body; on some specimens a little longer than body, light colored, 

 faintly imbricated. III with a row of 2-9 sensoria. Antennal 

 tubercles prominent. Beak reaching beyond second coxae. No 

 thoracic or abdominal tubercles showing. Hind tibiae with numer- 

 ous sensoria, especially on basal three-fourths. Cornicles plainly 

 swollen; about two imbrications at tip. Cauda short, plainly con- 

 stricted, three sets of lateral hairs. Measurements as follows: 



Antennal measurements 



Other measurements 



