32 John June Davis 



culate, irregularly placed, circular sensoria, IV with 2 to 7, and V and VI 

 base, with the usual distal ones. In the balsam mounts the cornicles do 

 not quite reach to the tip of the style; tips of the cornicles reticulated. 

 Measurements as follows : 



I II III IV V VI base VI filament Total 



Medial usually branching a little nearer the tip than to where M3+4 

 branches. Average length of cornicles, 0.51 mm; of style, 0.35 mm; of 

 body (not including style) 1.9 mm; width, 0.84 mm. 



Wingless female: Antennae a little longer than the body. Segment III 

 with about 75 irregularly placed, tuberculate sensoria, none on IV and the 

 usual ones on V and VI. Relative lengths of antennal segments as in 

 winged. Cornicles reaching to end of body but not to tip of style. Ends 

 of cornicles reticulated. 



Camera lucida drawings of the head, antenna, cornicle and 

 style of the winged viviparous female and the antenna of the 

 wingless female are given on Plate VI, figs. 100 to 103. 



109. M. pelargonii (Kaltcnbach) (Sipli. pelargonii Kaltenbach). 



" Siph. pelargonii Kalt. No. 148. On Hollyhock, Ashland. 

 Nov. I, 1890." 



One winged female, one wingless oviparous female and one 

 immature on the slide. 



Winged female: Antennae much longer than body; placed on conspicu- 

 ous frontal tubercles; segment III with 18 to 21 circular sensoria, more or 

 less in a row. Measurements of antennal segments : 



Medial (first branch of the third discoidal) arising nearer tip of wing than 

 to where M3+4 branches. Cornicles reaching to tip of style; imbricated. 



A little shrunken at tip. 

 Tip broken off. 



284 



