46 Journal New York Entomological Society, ^'o'- -^-^IH- 



A large series of topotypic examples, including several copulating 

 pairs taken in the years 1911 to 1914 inclusive, shows in the male con- 

 siderable variation in the width and extent of the pronotal dark vittse, 

 which are sometimes maculated with creamy white, and occasionally 

 a dark spot is found on the pronotal carina in the middle of the pale 

 area bounded by the anterior oblique and the medial transverse vittse. 

 The greenish color of the base of the metopidium also varies in ex- 

 tent, often wholly suffusing it, while the black of the abdomen, and, 

 in general, the amount of pigmentation throughout, is dependent upon 

 the degree of maturity of the insect. In the female the amount of 

 the whitish pronotal maculation is very variable, as is the continuity 

 of the black line along the dorsal carina. The abdomen, too, is often 

 wholly whitish green. The accompanying plate illustrates the macu- 

 lation and form of the specimens described, except that they are some- 

 what more slender than is indicated in figures 3 and 4. 



Falling close to Cyrtolohus {Atymna) qucrci, Fitch, it is readily 

 distinguished from that species in the male by the creamy white 

 pronotal area, pale metopidium and clear hyaline elytra with sharply 

 defined apical fuscous cloud. The female is very similar in aspect 

 to the female of qiierci, but in general the green of the crest is more 

 mottled with whitish, and the black line on the dorsal carina more 

 interrupted. In form the crest in both sexes is more decidedly ar- 

 cuate, is continued higher posteriorly, and is more coarsely and less 

 densely punctured; the anterior marginal ridge of the cheeks is more 

 sinuate; and the clypeus more broadly and gradually produced. 



This species appears in the mature form about the first of June 

 and reaches its greatest abundance at the middle of the month, con- 

 tinuing, however, through July. Although Qucrcus alba (on which 

 Cyrtolohus qiierci abounds) and oaks of the Q. rubra series occur in 

 the immediate neighborhood, I have never found this species on any 

 of them, Q. bicolor apparently being its exclusive food plant. 



Mr. E. P. Van Duzee, to whom I have submitted examples, has 

 kindly examined the species and compared it with the material in his 

 own very complete collection, and writes me that it is new to him, 

 confirming my conclusion that it is as yet undescribed. 



The species is named in honor of my wife in recognition of her 

 self-sacrificing encouragement of my entomological studies. 



