194 EE\". A. E. EATON OX EECEXT EPHEMEELD^E OK MAYELIES. 



piceous or intense warm sepia, and the venter light reddish white, densely and rather 

 uniformly dotted with dull dark reddish, and generally with the several pairs of subgan- 

 gKonie streaks well defined ; but the bases of the doi"sal segments above the dorsal vessel 

 are sometimes marked each with a pale streak. Forceps-limbs white, excepting the basal 

 joint, which is yellonish and irrorated with reddisli. Setae white, sometimes with their 

 joinings towards their insertion opaque. Wings vitreous throughout; the marginal area 

 of the fore wing contains about 6 faint simple cross veiulets before the bulla, and 7-12 

 better defined beyond it ; and the intervals of these last in the pterostigmatic space are 

 occupied by variously disposed, more or less plentiful, granulations ; most of the inter- 

 neural veinlets of the terminal margins are in pairs. Femora pale, somewhat lutescent, 

 slightly darkened a little before the tip, or more nearly white, and in some specimens 

 dotted ^"ith minute inconspicuous pale reddish specks ; fore tibia usually white, with 

 its extreme tip brown, but in one example sepia-grey with the tip piceovis ; fore tarsus 

 white, sometimes with brownish ungues ; hinder tibiae and tarsi wliite, sometimes 

 slightly tinged with yellowish, with the imgues, and most commonly the joinings also, 

 light red, or piceous. 



Variation, d im. (dried). — Thorax above fuscous, varied with flavescent, and slightly 

 dotted with darker near the insertion of the fore wings. Abdomen above closely punc- 

 tulate with black, somewhat fusco-griseous, varied with reddish and greyish white ; the 

 whitish markings comprise in each segment a streak from the base of the segment along 

 the dorsal vessel, a larger triangular spot at the base of the segment that terminates a 

 little before its dark apical border, and another rounded impressed spot at the base of 

 the segment, adjacent to the spiracular line, forming regular series of markings ; venter 

 whitish, tinged faintly with reddish, closely and minutely puuctulate with reddish, more 

 coarsely and sparsely punctulate with black, with a short small black acutely triangular 

 streak at the base of each of segments 3-8, adjacent to the spiracular line, and indistinct 

 traces of the usual series of pau's of curved linear sti-eaks adjacent to the ganglionic 

 cords. 



2 (dried). — Body variously coloured during life [ranging, according to Walsh, from 

 whitish brown mingled with brown to pale brown with the sixth abdominal segment 

 brown], mostly piceous afterwards ; surface very similar in detail to that of tlie body of 

 C. Sayeni. Setae white, with black joinings. Wings usually ornamented with pale 

 piceous, in nearly the same manner as those of C. Kageni ; but sometimes the disk of the 

 fore wing is spotless ; the costa, subcosta, and radius are whitish and ti-anslucent in the 

 pellucid spots ; there are about 6-9, mostly simple, cross veinlets before, and 12-14 

 beyond the bulla in the marginal area of the fore wing. Femora pale lutescent, or pale 

 luteous ; the coxse, tibise, and tarsi much paler ; the last tarsal joint, and the apical 

 borders of the others, as dark as the femora, and ochreous brown. Length of body 6-9o ; 

 wing 6-9 ; setae, 2 im. 10-5-12, 6 15-17 mm. (teste Walsh). 



Hah. Widely distributed in N. America ; Red River ; Quesnel Lake, British Columbia; 

 Vancouver's Island ; AVashington Territory ; Montana ; Oregon (M'^Lach. Mus.) and The 

 Dalles, Or. (23 June, 1882, S. Henshaw, Hag. Mus.); San Jose, Cal. ; Colorado; Rock 

 Island, and A'ormal, 111. ; also New York. Two 6 im. from Montana have a small cloudy 



