86 



THE CANADIAN ENTOMOLOGIST 



viviparous female as follows: It is a smaller individual. Antennae 

 much longer than body, relatively longer than in the vivi- 

 parous form; segment III bears 60 to 70 irregularly placed circular 

 sensoria, segment IV bears from 45 to 50, segment V with 29 to 31, 

 not including usual distal one, more or less in a row, and segment 

 VI bare, with the usual distal ones. 



Antennal measurements as follows: 



ANTENNAL SEGMENT NO. lm. 



Wingless oviparous female. (PI. V, fig. 25). 



Described from one specimen collected September 10, 1912, 

 at Madison, Wis. 



Head very pale brownish. Antennae black, excepting seg- 

 ments I and II, which are concolorous with head ; total length greater 

 than that of body; filament of segment VI much the longest; seg- 

 ment III with a single inconspicuous circular sensorium near base; 

 the usual sensoria at tips of segments V and base of VI. Thorax 

 and abdomen pale greenish yellow. Hind tibia swollen and bearing 

 a large number of irregularly placed, circular sensoria. Cornicles 

 blackish, pale at base; reaching a little beyond tip of cauda. Cauda 

 concolorous with abdomen. Otherwise as in the wingless vivi- 

 parous female. 



Measurements from one specimen in balsam: Length of body 

 not including cauda 2.17 mm.; length including cauda 2.30 mm.; 

 width 1.006 mm.; cornicle 0.89 mm.; cauda 0.51 mm. Antennal 

 measurements as follows: 



ANTENNAL SEGMENT NO. lm. 



