188G,] 105 



fuscous spot, not extending to the first ante-cubital, and another small spot of 

 similar colour below it, bordering the niembranule, and continued outwardly on the 

 two cross-nervulea in the second series of anal cellules (in the specimen before me 

 the triangles have a cross-nervule in both anterior-wings, and in the left posterior; 

 it is empty in the right posterior) ; membranule whitish-cinereous. 



Head dingy-yellow ; in the excision of the top of the front is a triangular 

 black mark, extended, as a line, along the upper margins of the eyes (antennse 

 black) ; the head is clothed with cinereous pilosity, especially dense on the vesicle, 

 and on the occiput, where it forms a long erect fringe : back of head yellow, mar- 

 gined with black, and with a dense whitish-cinereous fringe. Thorax pale olivaceous, 

 very densely clothed with cinereous pilosity ; the dorsal crest, a broad humeral 

 band, and two lines on the sides, black or blackish, the space between the two lateral 

 lines is yellow (in which is placed the black spiracle). Abdomen moderately 

 depressed ; pale at the base, but there is a broad black dorsal band extending from 

 the middle of the third segment to the apex, expanded at the posterior end of each 

 segment, and leaving an elongate lateral brownish-yellow space on each segment, 

 from 4 to 8 (the coloration of the ventral surface is nearly similar ; but the pale is 

 more prominent and the dark more subdued) : on the 10th dorsal segment there is 

 a central straight carina, on either side of which is a faint curved carina ; the outer 

 edge of this segment slightly excised. Legs black ; the anterior pair yellowish up 

 to near the end of the femur. 



Appendages black. The superior appendages (3 mm.) not quite so long as the 

 9th and 10th segments combined : viewed above, they are straight, convergent, and 

 sub-cylindrical, but somewhat before the apex they dilate, and become almost two- 

 branched, the inner branch forming a short triangular tooth, the outer being much 

 longer, curved outwardly, and stout and obtuse at the apex, its inner edge excised : 

 viewed from the side, these appendages are very straight, gradually thickened, with 

 a triangular production or tooth near the middle of the lower edge ; the apical por- 

 tion in this position may he compared inform to a dog's (or wolf's) head, -with long 

 profile and short erect ears. Inferior appendage extending to the portion of the 

 superior, where these latter become suddenly altered in form (yellowish internally 

 above), rather broad, slightly curved upward, the apex broadly excised, leaving the 

 outer angles very prominest. 



[ 9 unknown to me, but I believe that both sexes exist in the collection of my 

 friend Baron De Selys-Longchamps.] 



Hah. : Western North America (Washington Territory, collected 

 by the late S. K. Morrison). In my collection. 



In general form, dense pubescence, &c., this quite agrees with 

 the allied species. In the form of the spot on the top of the front it 

 approaches cynosiira, Say, and in the shape and extent of the dark 

 spots at the base of the posterior-wings there is resemblance to 

 spinigera, Selys. The shape of the apical portion of the superior 

 appendages, seen laterally, is such as (in the absence of figure) to have 

 occasioned a familiar comparison, and it also suggested the specific 

 name. 



Lewisham. London : Attgtist, 1886. 



