Jan., '03] ENTOMOLOGICAL NEWS. 3 



pleraentary sector is parallel to the posterior margin of the 

 wing ; subnodal sector forking under the middle of the ptero- 

 stigma (in hind wings i ^ , i ? , adnexa, Mexico, the forking 

 is at level of inner end of pterostigma), * 2 rows of cells in the 

 fork, 2 or 3, rarely 4 cells at margin ; supplementary sector 

 between the principal and nodal sectors originating far beyond 

 pterostigma ; submedian and supratriangular spaces cross- 

 veined, the first cross-vein of the submedian space placed 

 proximal to the first antecubital ; supplementary sector be- 

 tween the short sector and the upper sector of the triangle 

 apparently originating as the most anterior vein from the outer 

 side of the triangle ; inner side of the triangle of the hind wing 

 not half as long as the outer side ; median and short sectors 

 converging till beyond the nodus when the short sector appar- 

 ently merges into the median, the continuation of the short 

 sector to the margin of the wing apparently a branch from the 

 short sector at a point on the sliort sector 2 cells distant from 

 the point of union of the short and median sectors ; this apical 

 portion of the short sector is S-shaped and is separated from 

 the median sector by 2 or 3 cells for the distance of 2 cells, 

 then by i cell to the margin ; f i row of cells throughout or 2 

 rows in the proximal half of the space between the sectors of 

 the triangle of the hind wing ; anal loop of 3 vertical rows of 

 cells and supplemental loop behind it of 2 horizontal rows ; % 



*The upper branch of the fork is a continuation in direction of the sub- 

 nodal, the lower branch springs from this. I do not unde stand Karsch's 

 foot-note, p. 288 (see bibliography below), ''Aeschna i7igens Ramb,, A. 

 juncea (L.), A. squamata (Mull.), lassen mehrere feine Aeste des Subno- 

 dalsectors ahnlich dem Verhalten bei Anax Leach deutli :h erkennen." 



t The course of the short sector as found in Aeschna juncea undergoes 

 considerable modification in the gerus Aeschna. In A bonarierisis and 

 A. californica, for example, a condition approximating Ccryphceschna is 

 reached, but in the Aeschnas the short sector appears lorked with the 

 upper branch merging into the median sector, while the ower branch is 

 straighter than in Corypn^sschna. Also in Coryphcetchno the median and 

 short sectors are more converging throughout their lergths than is the 

 case in Aeschna. 



tProf. Needham in 1897 drew up a tentative description of a new genus 

 oi Odonata with ingests as the type, naminsj^ several s,\>tz\^s oi Aeschna 



