Vol. XXvi] ENTOMOLOGICAL NEWS 65 



Material examined in drawing up the preceding account: 



Homoeo chromatic Females. Tinicum Is., Pennsylvania, June 22, 

 1889, i teneral ; west side Schuylkill River below Gray's Ferry, Phila- 

 delphia, May 4, 1889, i teneral. Philadelphia, June 5, 1900, one speci- 

 men a little older. Philadelphia, May 22, 1904, i teneral. These four 

 have abdominal segments 8 and 9 blue with lateral black stripes. Tini- 

 cum Is., May 21, 1904, one specimen with abdomen pruinose. 



Hctcrochromatic Females. Tinicum Is., Pa., June 22, 1892, i teneral ; 

 May 21, 1904, two specimens. Christiana Creek, Elkhart, Indiana, 

 May 21, 1897, i teneral by R. J. Weith. Vermont, by Mrs. A. T. Slos- 

 son, i specimen. Only the Tinicum Is. specimens have 8 and 9 blue 

 with lateral black stripes, but all five have yellow or orange distinct on 

 head, thorax and first three abdominal segments. 



Composite (?) Female. The Delair female noted above. 



The eleven specimens cited are in the collection at the Academy of 

 Natural Sciences of Philadelphia. At different times I have given 

 other specimens to Mr. E. B. Williamson and Prof. J. G. Needham. 



Among my unpublished notes I find the following 1 which I 

 k\'ive in their original form: 



Teneral female Ischnura t'erticulis taken at pond, Botanical Garden, 

 University of Pennsylvania, 8.55 A. M., May 13. 1904 ; able to fly, wings 

 and body still quite flabby, colors pale but sufficiently well-marked to see 

 that the 8th and 9th abdominal segments were pale with a black stripe 

 on each side of each as in the male of this species. Placed in a 

 "Lightning" pint jar whose top was covered with a piece of netting; 

 contained a bit of twig for fly to crawl on. 



Examined 3.30 P. M. same day; dark colors much more marked, pat- 

 tern of 8 and 9 as before. 



May 14, 9.45 A. M. Pattern as before, dark colors on body generally 

 well-marked, black stripes on sides of 8 and 9 not reaching to apex of 

 respective segments. 



May 15, 12.30 P. M. Markings as on preceding record. 



May 16, 12.30 P. M. No apparent change. 



May 17, 9.15 A. M., do. May 18, 6 P. M., do. May 19, 6 P. M., do. 

 May 20, 1.45 P. M., do. May 21, 3.45 P. M., do. May 22, A. M., dead, 

 no change in the colors but still evidently teneral, no pruinosity. 



Two teneral females of Ischnura posita collected same time [i. e., 

 May 13, 1904, etc.] and place. If anything, more teneral than I. verti- 

 calis 9 ; did not show any trace of pale markings on dorsum of 8 

 and 9, ;'. e., had practically pattern of adult. Three males, one female, 

 teneral, posita, taken 10 A. M., May 14, 1904, likewise did not show 

 any traces on 8-10 of a pattern different from that of the mature indi- 

 viduals. 



