AMERICAN LEPIDOPTERA. 253 



interspaces forming hands, and these colors in general alternating, the extreme 

 base being lighter, and the two at the middle of the wing being also lighter, but 

 separated by a black line with a blackish outer shading ; the bands beyond mid- 

 dle become a little broader at costa, so that they become fiTially parallel with 

 outer margin, the submarginal one being narrow, forming a distinct denticulate 

 white line ; other specimens have thorax, abdomen and wings darker, the lighter 

 spaces being gray and the darker grayish black ; there is also soihe variation in 

 the width of the bands, which, from the extreme base, are nine in number; the 

 veins forming the discal cell are somewhat emphasized by blackish, which is 

 more prominent on the median. Hind wings with lines corresponding to the 

 fore wings, but less distinct, becoming obsolete towards base, and with interspaces 

 more uniform light fuscous, except that the lines have a dark outer shading. 



Female varying in colors of thorax and abdomen from light gray to dark fus- 

 cous, the thorax being the darker, at times almost blackish, and the abdomen 

 sometimes annulate with gray. Wings gray, with a deep black band beyond 

 middle. 



Described from four males and five females, one pair sent by Prof. 

 Fletcher, the rest from Mr, W. H. Dan by, all of these taken by 

 Mr. Danby at Victoria, Brit. Col., from early in November to about 

 middle of December. The females seem to vary considerably in 

 size, some being hardly larger tlian the 9 of Rachela bruceata, while 

 others are almost as large as the 9 of Erannis tiliaria. The spe- 

 cific name is given in honor of its discoverer, Mr. Danby. 



7 RACHEL,A n. gen. 

 Type bruceata Hulst. 



Palpi small, slender ; tongue wanting ; clypeus rather broad, 

 scaled ; antennae % even, each segment with two fascicles of hairs 

 on each side ; thorax and abdomen untufted ; hind tibiae with two 

 pairs of spurs ; antennse of 9 filiform, very slightly pubescent ; 

 thorax and abdomen of 9 closely joined, somewhat vermiform ; 

 fore wings % broad, even, 12 veined, la and lb present, strong, 3 

 widely separate from 4, 5 nearer 4 than 6, 6 long stemmed with 7, 

 10 on 11 anastomosing with 9 forming a long accessory cell, 11 from 

 cell, 12 free; hind wings 8 veins, la and 16 present, strong, 3 and 

 4 widely separate, H and 7 long stemmed, 8 anastomosing with cell 

 to beyond middle ; wings of % almost entirely lacking. 



Name given in honor of Mrs. Rachel Bruce, whose husband, Mr. 

 David Bruce, han done so much towards a knowledge of the Lepid- 

 optera of the central Rocky Mountain region, and to whom I am 

 indebted for many favors. 



Species. — E. bnweata Hulst. 



a. hyperborea Hulst, n. sp. 



fli. oecidenta lis Hulst, n. s p. 



jR. iatipennis Hulst, n. sp. 



TRANS. AM. ENT. SOC. XXIII. • JULY, 1«96. 



