June, I902.] KeARFOTT : ()N NoRTH AMERICAN ChOREUTRS. 116 



"Two $ $, Sierra Nevada Mountains, Cal. Tlie second specimen has the 

 golden brown of thorax and fore wings replaced with fuscous." 



In a general way this resembles the European bjerkandrella Thunb. , 

 but I have no hesitation in pronouncing it distinct, and moreover 

 from the material I have had an opportunity to examine it is not espe- 

 cially variable. Compared with bjerkandrella, the primaries are quite 

 different in outline, in bjerkandrella they are rather short and rounded, 

 while in silphiella they are elongated and the outer margin instead of 

 being an easy curve is nearly straight. The ochreous base extends 

 farther along the costa than in bjerkandrella and its area is greater. The 

 general color of silphiella is lighter. The white lines and dashes on 

 the hind wings are much broader in silphiella ; this is especially appa- 

 rent on the under surface. The fringe on the hind wings is longer in 

 silphiella. 



This species has a wide range. Coquillett, who bred the speci- 

 mens from which Grote described it, took the larvae in Illinois, Lord 

 Walsingham collected specimens which are labelled " Head of Noyo R., 

 Mendocino Co., Cal., June 8 to ii, 1871." I have specimens from 

 Yellowstone Park, Wyo. (Burrison), and Chicago (J. H. Reading). 



In all of the specimens the marks and characters are constant with 

 very slight variation, certainly not enough to warrant a connecting 

 link between it and any other species recognized in this paper. 



Its distinguishing characters are : ( i ) Large size, expanding 1 5 

 mm.; (2) ochreous patch at base of primaries, involving one-quarter 

 of length of wing, head and thorax of same color; (3) outer three- 

 quarters of primaries thickly sprinkled with cream color scales ; (4) 

 two large velvety black spots on outer half, ornamented with metallic 

 scales, and (5) broad white dashes and lines on inferiors. 

 Choreutis carduiella, sp. nov. 



Dark brown, thickly dusted with cinereous scales, without a lens the ground very 

 dark, almost black, slate color. 



Antennas dark brown, ringed with whitish, tuft at tip of basal joint. Palpi brown, 

 streaked with orange on second joint, basal joint almost white. 



Head brown, dusted with white specks. Thorax orange-ochreous streaked with 

 cinereous ; outer edge of patagia and two streaks on mesothorax cinereous. A row 

 of greenish metallic scales on inner edge of patagia. 



Fore wings : Deep fold at base of median vein, above this at base is a tuft or 

 streak of long raised orange ochreous scales, below it is a smaller patch of shorter 

 scales, same color in 9 but dark umber in $ ; between these ochreous streaks on 

 median vein, also on costa next to base, is a fine line of metallic scales, also a few 

 metallic scales below ochreous patch near inner angle. Next, outwardly, is a broad 



