AMERICAN LEPIDOPTERA. 293 



Descriptions of North American NOCTUIDAE.— No. ». 



BY AUG. R. GROTE. 



HARRISIMEMNA, n. g. 



Harrisimemna sexguttata. 



Thyutira? sexguttata, Harris (in letters to Doubleday) Correspondence, 



pp. 174, 245. 

 Grammophora trisignata, Walker. 



The characters drawn from the young of this species discovered by 

 Harris, in his correspondence with Doubleday and Miss Morris, are 

 very peculiar. The larva seems to mimic that of the Diurnal Basilar- 

 chia. I have observed it on Staten Island ; Mrs. Bridgham has reared 

 the species at Seekonk, Rhode Island. The perfect insect is allied to, 

 but generically distinct from Moma Hiibn. It cannot be referred to 

 Thyatira or to the Cymatophorini, from the course of the costal ner- 

 vure of the hind wings. It differs throughout from Polygrammate 

 Hiibn. {Grammophora, Guenee), to which Mr. Walker refers it under 

 a specific name which I the more readily discard since it is preoccu- 

 pied in this family for a species of Hadena. 



An unusual feature in the imago is offered by the disproportionately 

 large brown tuft on the dorsum of the 4th abdominal segment. It 

 would be interesting to compare the location of the body tufts in the 

 larva and the perfect insect. Another feature in Harrisimemna is the 

 embossed clypeus which doubtless facilitates the escape of the moth 

 from the chrysalis. 



CHARADRA, Walker. 



€haradra propinquilinea, Grote.— 9 .—Size of C. deridens from 

 which it differs at first sight by the propinquity and subparallelism of the 

 ] ledian lines, which are not joined at the centre of the wing as in our usual 

 species. Whitish or bluish grey. Median lines distinct, propinquitous, sub- 

 parallel, excavate. T. a. line twice outwardly produced opposite the cell, and 

 once inwardly on internal nervure. Orbicular round, evident, filled with 

 whitish, with a central dark dot. Reniform contiguous to t. p. line, incom- 

 pletely ringed with a central dot. Median shade apparent above and below 

 orbicular, where it runs approximate to t. a. line. Subterminal space very 

 wide; s. t line apparent at costa, afterwards faint, scalloped. The whitish 

 frosting of the wing becomes lost externally. An interrupted terminal line 



TRANS. AMER. ENT. SOC. (38) JANUARY, 1873. 



