Vol. XXV] ENTOMOLOGICAL NEWS 451 



17, 18, 22 and 23, 4 $ , I 9 ; Bay City, May 27, 4 $ , 2 $ ; Williams 

 Lake, May 26, 15 $,2 9. 



Oklahoma : Wister, June 3 and 4, 9 ,J , 3 ? ; Henryetta, Aug. 20 and 

 Sept. (Collins), 2 5 . 



The wing markings of the females from different localities vary 

 but little, and probably the variation is not associated with locality. 

 The female taken at Brownsville has the most yellowish of any, this 

 color surrounding the customary darker markings. The Oklahoma 

 females have the wing markings slightly less extensive than the others. 



58. Erythrodiplax berenice. 



Texas: Matagorda, May 25, 10 ^ , 12 $ . Of the 12 females only I 

 shows distinctly the clouded area near the nodus ; another shows it 

 very indistinctly and the rest not at all. Of the 12, 9 are hetero- 

 chromatic. In these 9 there is more or less yellow at the wing bases ; 

 in one only does this reach the first antenodal, and this is in the single 

 specimen having the colored area near the nodus. In the 3 homoeo- 

 chromatic females the brown at the base of the hind wings is the 

 merest trace and is entirely wanting on the front wings. In some 

 apparently older heterochromatic females the thoracic dark markings 

 are more extensive than in others and the abdomen is as dark as in 

 the homoeochromatic females. In the youngest homoeochromatic 

 female the thorax is shining black (dull in the others), and the abdo- 

 men is colored about as in the usual heterochromatic form. To sum- 

 marize — the constant differences between the two forms in this material 

 are confined to the head markings (as described by Calvert, B. C. A. 

 Neur., p. 269), the thorax and the wing bases. 



Four females selected at random had the following characters of 

 the left wings tabulated (see Calvert, B. C. A. Neur., p. 268) : 



Number of marginal cells between 



Stigma and M2 R5 and M3 M4 and Cui 



i- w. 31, 33, 34, 36. f. w. 23, 23, 22, 23. f. w. 6, 10. 7, 7- 



h. w. 27,33,35,40. h. w. 24,28,26,28. h. w. 13,16,13,14. 



In the above tabulation the first figure in each case is that of one 



individual, the second figure of another, and so on. 



59. Erythrodiplax umbrata. 



Texas: Brownsville, May 13 and 15, 4 ^ , i $ ; Black Bayou, May 

 17 and 23, I $ , 1 9 . 



60. Erythemis simplicicoUis. 



Texas: Black Bayou, May 16, 18, 21 and 22, 2 5,4?; Bay City, 

 May 24, I $ ; Matagorda, May 25, i $ ; Williams Lake, May 26, 3 ^ . 



Oklahoma: Wister, June 3 and Aug. 2, 4, 5 and 6 (Collins), 2 $, 

 23 9. 



61. Erythemis verbenata. 



Texas: Black Bayou, May 21, i 9. 



