50 



THE CANADIAN ENTOMOLOGIST. 



Winged viviparous female. (Plate II, figs. 8, 10.) 



Head pale to reddish brown, sometimes with a faint greenish 

 tint, especially at the margins. Antenna; brownish to black, 

 excepting segments I and II, which are dusky; sparsely hairy; 

 filament of segment VI the longest; total length much more than 

 body length; 9 to 13 (usually 9 to 10) circular sensoria in a row on 

 III and the usual ones on V and base of VI. Eyes dark red. 

 Thorax pale brown. Fore wings with the usual twice-branched 

 media; first anal and cubitus conspicuous and with a prominent 

 border. Legs as in the wingless form. Abdomen pale green, with 

 a blackish ring on the dorsum surrounding each cornicle and a 

 dusky area extending across the dorsum posterior to the cornicles. 

 Cornicles black, cylindrical, gradually tapering toward the apex, 

 which is about one-half the diameter of the base, extending much 

 beyond tip of abdomen, and with the tip reticulated. Cauda pale 

 yellowish green, ensiform, and moderately hirsute. 



Measurements from specimens on slides: Length of body 

 1.62-2.05 mm., average 1.9 mm.; width of body 0.70 to 0.90 mm., 

 average 0.79 mm.; length of fore wing, average, 3.17 mm.; width 

 of fore wing, average, 1.08 mm.; length of middle tibia, average, 

 1.82 mm.; length of hind tibia, average, 2.34 mm.; length of hind 

 tarsus, average, 0.097 mm.; length of cornicle, average, 0.87 mm.; 

 length of cauda, average, 0.25 mm. Antennal measurements as 

 follows: 



AXTEXXAL SEGMEXT XO. lm. 



