212 [February 



haps it is Oh. Harrisii. Generally, in the dried specimens the face and 

 dorsum are much more yellowish instead of light green, the anterior 

 lateral prothoracic spots are not so conspicuous ; antennae very slightly 

 darkened, especially towards the points, and the tarsi have become 

 somewhat, but not very conspicuously, darker than the rest of the legs- 



Comparisons. — This species almost agrees with Chrysopa rufilabris 

 and Harrisii, but differs in having no black nervures or rufous occipital 

 points, in having the antennae uniformly white in life, and the nervures 

 all fimbriated with black. Differs from Oh. plorabundd in not having 

 a yellow dorsal stripe or yellow pointed anteunas in life, in having the 

 anterior wings, as well as the posterior, a little acuminate, in the larger 

 size and the brownish feet and ungues. It differs from Oh. pseudo- 

 <jrapha in having the dorsal line broad instead of narrow and white, in 

 not having the segments each side with an apical yellow spot, &c. ; and 

 among all these similar species I see no ace mnt of a small black spot 

 at the base of the maxillae hence I presume this to be a prominent spe- 

 cific mark. 



While this species contains many characteristics distributed among 

 Dr. Fitch's descriptions of Oh. rufilabris, Harrisii, externa, Robert- 

 sonii, plorabunda, pseud ographa and others, yet it does not entirely 

 agree with any one of them. Hence, if there was any just warrant for 

 constructing so many species from insects so very similar, from such 

 high authority as Dr. Fitch, and that, too, confirmed by Hagen, leaving 

 out of the question the very important fact of this species feeding and 

 multiplying so extensively on chinch-bugs, which, it may be argued, 

 was only circumstantial from the presence of the bugs, I can see no 

 just cause why this also should not be entitled to specific rank This 

 is the only apology I have to offer the scientific world for thus presum- 

 ing to add another to the already numerous species of Ohrt/sopa. 



Mount Carroll, Illinois, January, 1865. 



