BUFFALO SOCIETY OF NATURAL SCIENCES 77 



deeply compressed at the middle leaving an almost bulbous in- 

 flation before and a smaller one behind. In all these groups 

 the crest is laterally compressed at its middle where it some- 

 times becomes membranous and subhyaline. Cyrtolobus fen- 

 cstratus Fitch may be taken as the type of the first group as it 

 is of the genus, Atymna castance Fitch of the second, Evash- 

 mcadca concinna Godg. of the third, and Cyrtolobus in flatus 

 VanD. of the fourth. 



The typical marking of Cyrtolobus is that seen in fcncstra- 

 tns and vau and still more clearly in limns. An oblique ante- 

 rior vitta beginning at the middle of the lateral margin and 

 meeting in an acute angle on the dorsal line at the anterior base 

 of the crest; a median dorsal spot, usually square or squarish, 

 at the middle of the dorsal margin of the crest ; and a transverse 

 vitta at the posterior base of the crest, which may become 

 oblique and approach the base of the anterior vitta on the 

 lateral margin. The apex of the elytra has a fuscous cloud 

 which may be elongated, clearly differentiated, diffuse, or alto- 

 gether wanting. The tergum in the female is normally black 

 or dark brown with its base rather broadly pale. Among 

 the best characters for distinguishing the species are the 

 form of the clypeus, lorae, and cheeks, and of the dorsal crest. 

 The latter character however is subject to much variation, 

 within certain limits, in the same species. The form of the 

 genitalia I have found to be of very little value in discriminat- 

 ing the species, and the characteristic marking may be distinct 

 in some individuals of a species and almost entirely obscured in 

 others; this is especially the case when the specimen has not 

 become fully matured. The male is frequently smaller, much 

 more deeply colored, with the dorsal crest less elevated than in 

 the female. Here the females are much more frequently taken 

 than the males and in many forms the male is still unknown 

 to me. . 



In the synonomy I have used Emmons' name on all those 



species first published in the insect volume of the Natural 



History of New York. The specimens and determinations 



were supplied by Dr. Fitch but there is no evidence that he 



drew up the descriptions and in fact there is strong evidence 



that he did not write them. I cannot accept Mr. Kirkaldy's 



rehabilitation of a mere typographical error, Cyrtoisa, for this 



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