SECRETARY'S REPORT. 



155 



abdomen in the male appears covered with a bluish white pow- 

 der, while that of the female is reddish, marked on tlie sides 

 with oblique yellow spots. The feet of both sexes are black, a 



Fig. 28. 



little reddish toward the base, and the wings hyaline, excepting 

 the spots, which are fuscous. The hind wings of the male 

 have also a milky spot at the base, covering about two meshes 

 in width, and reaching the hinder angle of the basal fuscous 

 spot. 



Figure 29 represents the 

 female of a common species 

 throughout the country, call- 

 ed Diplax Berenice, or the 

 Berenice dragonfly, so named 

 by Drury. The male (figure 

 30) differs from the female 

 chiefly in the darker color of 

 the abdomen, and in having Fig. 29. 



the wings without the fuscous cloud. The front of the head is 

 bright steel blue with yellow spots, the blue space much larger 

 in the male ; the thorax and 

 abdomen black, with many 

 large and distinct yellow bands 

 and spots in the female, and 

 with only five large yellow 

 spots on each side of the abdo- 

 men in the male, and one or 

 two on the sides of the thorax. 

 Length a little more than 

 1.25 ; wings expand nearly or 

 quite 2. 



Fig. 30. 



