126 THE CANADIAN ENTOMOLOGIST. 



Winged viviparous female. 



(Fig. 14 and PI. V, figs. 27-30). 



Head pale yellow, with a slight dusky tint near posterior 

 border; the antennal tubercles typical of the genus Myzits. An- 

 tennae with segments I and II whitish with a slight yellowish tint, 

 II sometimes faintly dusky, III with extreme base pale and the 

 remainder blackish, IV and V pale with dusky to blackish tips, 

 base of VI blackish and filament of VI pale with blackish tip (in 

 some specimens the entire antenna excepting segments I, II and 

 extreme base of III is blackish); segments III and filament of VI 

 subequal, sometimes the one and sometimes the other being larger; 

 total length less than that of the body; segment III with 18 to 26 

 circular sensoria, and the usual distal ones on segments V and base 

 of VI. Eyes dark reddish brown, almost black. Ocelli bordered 

 with conspicuous dark wings. Beak reaching only a little beyond 

 coxae of the first pair of legs. Thorax yellowish, with the thoracic 

 plates yellowish brown and their apices of a darker tint. Wing 

 veins pale brownish and narrow, branching as shown in illustration. 

 Femora whitish, with a faint yellowish or greenish tint, the tip 

 dusky; tibiae pale brownish with blackish tip; tarsi blackish. Ab- 

 domen pale lemon-yellow and with a longitudinal, dorsal median 

 line of a pale green colour, which is often more or less inconspicuous; 

 sometimes the fall forms show three very faint dull-yellowish spots 

 on each side of abdomen, anterior to the cornicles. Cornicles 

 whitish, with a faint yellowish tint and semitransparent, reaching 

 a little beyond tip of cauda, cylindrical and very slightly flaring at 

 tip. Cauda pale yellow, slightly paler than body colour. 



• 



Average measurements from 15 individuals in balsam as 

 follows: Length of body, not including cauda, 1.8 mm.; length, 

 including cauda, 1.9 mm.; width 0.66 mm.; length of wing 3.6 mm, 

 width 1.3 mm.; length of cornicle 0.43 mm., of cauda 0.22 mm. 

 Antennal measurements as follows: 



