82 



THE CANADIAN ENTOMOLOGIST 



many are coalesced. Abdomen pale green, the segments posterior 

 to the cornicles usually concolorous with thorax. Cornicles con- 

 colorous with abdomen at extreme base, the tip black, and the re- 

 mainder brownish to blackish; not reaching to tip of cauda; cylin- 

 drical, the top only slightly narrower than base; the distal end 

 reticulated. Cauda concolorous with abdomen and with a slight 

 duskiness, the tip blackish; ensiform; very sparsely hairy; less 

 than half the length of cornicles. 



Average measurements from specimens on slides in balsam, 

 made soon after mounting: Length of body 2.55 mm., width 1.31 

 mm.; length of middle tibia 1.31 mm., of hind tibia 1.75 mm., of 

 hind tarsus 0.135 mm., of cornicle 0.80 mm., of cauda 0.35 mm. 

 Antennal measurements as follows: 



ANTENNAL SEGMENT NO. lm. 



Described from specimens collected at La Fayette, Ind., on 

 crested wild buckwheat {Polygonum cristatnm), September 4 and 6, 

 1911, and on curled leaf dock (Rumex crispus), October 13, 1911, 

 and October 26 and November 19, 1912. We have also collected 

 it on Polygonum cristatnm at Lancaster, Wis., September 26, 1911, 

 and have received it from Mr. W. J. Phillips, who collected it 

 "from a vine in clover field" at Warsaw, Ind., August 18, 1911. 

 Mr. J. T. Mouell also collected this species at St. Louis, Mo., 

 October 4, 1911, on Rumex. The viviparous females occur on the 

 Polygonum, while the males and oviparous females occur in the 



