February, '14] 



DAVIDSON: PLANT-LOUSE NOTES 



131 



of duskiness, as wide at the base as long; cauda, pale, globular, as long as cornicles; 

 cephalic margin of head with four capitate hairs; margin of abdomen with a few 

 short capitate spines; beak, pale, tip brown, extending beyond hind margin of pro- 

 sternum. Measurements: Body, length, 2.45mm.; body, width, 1.12mm.; cornicles, 

 .066mm.; cauda, .060mm.; antennae, joint III, .410mm.; joint IV, .205mm. ; joint V, 

 .175mm.; joint YI, .133mm.; filament, .130mm. On some specimens (the older 

 ones) the orange-colored abdomen is verj^ pronounced. 



Described from six specimens collected November 12, 1912. 

 land, Cal., on Q. rohur L. 



Oak- 



Fig. 3, Myzocallis quercus (?); 7, oviparous female; 8, winged male; 9, winged 

 male, antenna. 



Winged male: General color, pale j^ello wish-green ; eyes, bright red; basal points 

 of antennae pale, distal joints, dusky or black; head, prothorax, last two abdominal 

 segments, dark green, olivaceous; thoracic lobes, scutellum, cornicles, and seven 

 transverse bars on abdominal dorsum, black; a row of black spots on each side of 

 the abdomen; veins of wings narrow, brown; stigma, brown; stigmatic vein, entire; 

 discoidals I and II, thick; legs, pale greenish-yellow; femora and tarsi, dusky brown. 

 Sensoria as follows; III, 27-30; IV, 8-10; V, 9, 10; VI, 4, 5. Measurements: Body, 

 length, 1.33mm.; body, width, .47mm.; wing expanse, 4.40mm.; cornicles, .028mm.; 



