ART. 20 



THE APHID GENUS AMPHOROPHORA MASON 



23 



Color notes (Pergande MSS.) . — "Apterous females, larvae and pupae 

 very pale yellowish green, pale bluish green or almost white with but a 

 slight yellowish or greenish tinge; the head is generally palest, frequently 

 white; all are covered with a delicate pruinose secretion; antennae 

 and legs white or faintly brownish, tip of tibiae and tarsi darkest, 

 tip of tarsi and claws blackish; apex of antennal joints 3 to 5, the 

 basal section and apical one-third or more of the spur of the sixth 

 black. Eyes brown; nectaries and tail of color of legs. The thorax 

 and wing pads of the pupa are almost white with the external edge 

 of the wing pads blackish." 



Fall migrant {On Ribes). — Antennae longer than body; dark col- 

 ored, III, IV, and V with sensoria, tuberculate, distal segments imbri- 

 cated; hairs shorter than width of segment, I gibbous on inner side. 

 Antennal tubercles very small, especially on outer side. Beak short, 

 hardly reaching second coxae. Prothoracic lateral tubercles dis- 

 tinct, a spine showing in front of each. Abdominal segments with 

 large lateral dark areas, each bearing a tubercle and one or more 

 spines. Cornicles comparatively short, conspicuously swollen, slightly 

 imbricated at tip. Cauda long, strongly constricted, three sets of 

 lateral hairs. Measurements as follows: 



Antennal measurements 



Other measurements 



