44 THE CANADIAN ENTOMOLOGIST. 



Blue inclosing the subdorsal dots, constricta, Str. 



Blue not reaching the dots, ambishnilis, Dyar. 

 Lateral region with no blue shade, californica, Pack. 

 Line forming a row of elliptical blue spots. 



A slight subdorsal orange band, fragilis, Str. 



A heavy orange band, - - pluvial is, Dyar. 



ASTATUS BICOLOR, SAY. 



BY WILLIAM J. FOX, PHILADELPHIA. 



In reply to Mr. Charles A. Hart, who has shown, in the last number 

 of this journal, that in his opinion I am in error regarding the identifica- 

 tion of A status bicolor, Say, I would say that the stigma of the $ only 

 is "yellowish-rufous", while that of the $ varies from reddish-black to 

 deep black. If he will again consult my synopsis of the genus Astatus 

 he will find that I used the words " stigma of wings black " in separating 

 those of the female sex. In regaid to my new species, A. pygidialis, 

 which Mr. Hart suggests may be an extreme variety of bicolor, it differs 

 not only in the slight characters mentioned by him, but also in the shorter 

 and triangular pygidium, and the more feeble armature of the legs ; the 

 scutellum is not furrowed down the middle, and the insect itself is much 

 smaller. Although it might prove to be but a variety of bicolor, never- 

 theless a series of nineteen specimens of that species and three of 

 pygidialis show no intergradation, and therefore I think I was justified in 

 describing it as new. I would rearrange the synonymy suggested by 

 Mr. Hart as follows : 



Astatus bicolor, Say. 



A. bicolor, Say. Lee. Edition, I., p. 166, 9 6 • 



A. rufiventris, Cress. Tr. Am. Ent. Soc, IV., p. 218, $. 



A. termiuata, Cress, ibid., p. 218, &. 



A. pygidialis, Fox. 



A. pygidialis, Fox. Can. Ent., XXIV., p. 234, $ . 

 A. bicolor, Hart, (not Say), ibid., XXV., p. 27. 



