250 PROCEEDINGS OF TPIE NATIONAL MUSEUM vol. ii4 



typical of the new species, and separate it well from all known Acleris 

 species. 



Acleris maciilidorsana (Clemens) 



Cnephasia ? maculidorsana Clemens, 1864, Proc. Ent. Soc. Philadelphia, vol. 3, 



p. 516. 

 Teras maculidorsana. — Robinson, 1869, Trans. Amer. Ent. Soc, vol. 2, p. 281, 



pi. 7, fig. 64.— Zeller, 1875, Verhandl. zool.-bot. Ges. Wien, vol. 25, p. 213.— 



Moffat, 1887, Canadian Ent., vol. 19, p. 88. 

 Teras hastiana var. maculidorsana. — Walsingham, 1879, Illustrations of typical 



specimens of Lepidoptera Heterocera, pt. 4, p. 76. — Fernald, 1882, Trans. 



Amer. Ent. Soc, vol. 10, p. 7. — Grote, 1882, New check list of North American 



moths, p. 57, no. 11. 

 Alceris [sic] hastiana maculidorsana. — Fernald, [1903], U.S. Nat. Mus. Bull. 52, 



p. 473, no. 5309d, 1902. 

 Peronea hypericana Ely, 1910, Proc. Ent. Soc. Washington, vol. 12, p. 68. — ■ 



Meyrick, 1912, in Wagner, Lepidopterorum catalogus, pt. 10, p. 61; 1913, 



in Wytsman, Genera insectorum, fasc. 149, p. 62. — Barnes and McDunnough, 



1917, Check list of the Lepidoptera of Boreal America, p. 178, no. 7418. 

 Peronea maculidorsana. — Meyrick, 1912, in Wagner, Lepidopterorum catalogus, 



pt. 10, p. 64; 1913, m Wytsman, Genera insectorum, fasc. 149, p. 63. — 



Barnes and McDunnough, 1917, Check list of the Lepidoptera of Boreal 



America, p. 178, no. 7431. — Forbes, [1924], Cornell Univ. Agr. Exp. Stat. 



Mem. 68, p. 486, 1923. — McDunnough, 1934, Canadian Journ. Res. vol. 11, 



pp. 310, 327, (fig. 10), 331 (fig. 2); 1939, Mem. Southern California Acad. 



Sci., vol. 2, p. 59, no. 7497; 1940, Canadian Ent., vol. 72, p. 60.— Darhngton, 



1947, Trans. Amer. Ent. Soc, vol. 73, p. 103. 



On the basis of examination of two genitalia sHdes, McDunnough 

 (1934) wrote about the armature of the vesica of maculidorsana that 

 it consists in this species of a bundle of small cornuti, variable in 

 nmnber (8 to 12 in the specimens examined by McDunnough). In 

 six slides of the male genitaha of maculidorsana examined by the 

 present author, the cornuti form two groups, one basal and one distal, 

 distinctly separated one from the other. Only in one specimen 

 (Whitesbog, N.J.) was this separation not clearly seen, perhaps because 

 of an inappropriate position of the aedoeagus on the slide. The basal 

 group of the cornuti consists of two rather stout, almost equally sized 

 needles; they were seen also in the above specimen from Whitesbog. 

 Judging from the examined slides, the number of the cornuti in the 

 distal group varies from six to eight. These cornuti are thinner and 

 about IK times as long as the basal ones. On the figure published by 

 McDunnough (1934, p. 327, fig. 10), these two groups of the cornuti 

 are seen quite distinctly, although the difference of their lengths is not 

 shown. It should also be mentioned that the apical spine of the vesica 

 (the so-called "rose-thorn") was directed inward toward the aedoeagus 

 tube in all the examined slides. 



Specimens examined. — One male (genitaha on slide 422-Obr.), Red 

 Rocli Luke, Whiteshell Forest Reserve, Manitoba, May 13, 1954 



