142 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



PARANTHRENE DOLLII form CASTANEA (Beutenmuller) 



Sciapteron dollii var. castanemn Beutenmuller, Bull. Amer. Mus. Nat. Hist., vol. 



9, p. 213, 1897. 

 Memythrus dollii var. castaneus Beutenmuller, Mem. Amer. Mus. Nat. Hist., vol. 



1, pt. 6, p. 253, pi. 30, fig. 5 (male), fig. 6 (female), 1901. 

 Paranthrene castaneum McDunnough, Check list of the Lepidoptera of Canada and 



the United States of America, pt. 2, No. 8802a, 1939. 



This is a color variation in both sexes, the black and brown on thorax 

 and abdomen of typical dollii being replaced with bright chestnut and red- 

 brown. The suffusions between the veins of the hindwings are denser 

 and in most of the available specimens extend nearer to the wing base. 



With Virginia as a transition zone the colors intensify southward to 

 Florida and along the Gulf States into Texas and inland along the 

 Mississippi Valley to Missouri. 



Type. — Male. In the American Museum of Natural History. 



PARANTHRENE DOLLII FASCIVENTRIS, new form 



Plate 26, Figure 160 



In contrast to the intensified coloration of the form castanea, which 

 represents the southern extension in the range of dollii, the form jasci- 

 ventrls, in which the coloration is moderated, represents the northern 

 extension in the range of the species. Wings of both sexes pale rufous. 

 Collar black, edged with pale yellow. Thorax black, posterior half of 

 tegula and the metathorax narrowly striped with yellow, the yellow mark 

 being continuous and in the form of a semicircle. Abdomen pale brown, 

 all segments ringed with pale yellow. 



Distribution. — Midwestern States, Illinois, Wisconsin, Indiana, Michi- 

 gan. Specimens comprising a long series from the dune regions of Lake 

 Michigan in Illinois and Indiana are consistently of this form. 



Type.— U.S.N. M. No. 56845. 



Described from male type, female allotype, four male and three female 

 paratypes from Chicago (May and June), and three male and three 

 female paratypes from Cicero, 111. 



PARANTHRENE ROBINIAE ROBINIAE (Hy. Edwards) 



Sciapteron robiniae Hy. Edwards, Bull. Brooklyn Ent. Soc, vol. 3, p. 72, 1880. — 

 Packard, Insects injurious to forest and shade trees, U. S. Ent. Comm. Bull. No. 

 7, pp. 103, 127, 261, 1881; Fifth Rep. U. S. Ent. Comm., p. 360, 1890.— Rilev, 

 Proc. Ent. Soc. Washington, vol. 1, p. 85, 1888; Insect Life, vol. 2, p. 18, 1889.— 

 Beutenmuller, Bull. Amer. Mus. Nat. Hist., vol. 4, p. 171, 1892; vol. 8, p. 120, 

 1896; vol.9, p. 218, 1897. 



Memythrus robiniae Beutenmuller, Mem. Amer. Mus. Nat. Hist., vol. 1, pt. 6, p. 

 248, pi. 29, fig. 15 (female), 1901. 



Paranthrene robiniae McDunnough, Check list of the Lepidoptera of Canada and the 

 United States of America, pt. 2, No. 8794, 1939. 



Male. — Antennae strong, broadly bipectinate, ochreous. Labial palpi 

 rough, yellow, slightly touched with black at the sides. Head black, a 



