A REVISION OF THE DELTOID MOTHS SMI'lII. f)? 



transverse anterior more oHtcur\-e(l, the transverse posterior tre 

 (|uently denticulate. Tlie reiiifonii (ends to become entirely black; 

 but this IS a variable feature. In all other ]»articulars the <les(;iiittion 

 of ('. »iorhi(lalis ai)plies. 



Expanse of wings, 23 to 31 nun. = O.DL' to 1.24 inches. 



Habitat. — Canada to British Columbia, south to J)(la\vare. w»'st to 

 South Dakota. June and July, 



The relation of this species to C. morhidnlis has been alreadj' stated. 

 As a whole, it is distinctly smaller and darker in ground color. There 

 is also a smoky suffusion of the primaries in many cases, and a less 

 marked detinition of the ordinary lines. Yet some specimens are 

 exactly like C. morbidalis in all save size. With a series of more than 

 fifty specimens at hand, 1 tind none that I consider as doubtful, even 

 where equals in size, though I confess myself unable to define the 

 specific characters more accurately than 1 have done. 



The genitalia of the male agree in all essentials with tliose of C. 

 morhidalis, but the membraneous ])rolongation of harpes is rounded at 

 the tip, the inferior corneous process has a curved ]>oint and is more 

 irregular. 



Where the two occur together the species is not so common as f\ 

 morbidalis, but it is less frequent southward, and I have received it 

 from South Dakota without any examples of C. morbidalis. 



Genus BLEPTINA, Oneuee. 



18.^4. Guen<5e, Species (ieuernl, Deltoidcs, 66. 



1859. Walker, Cat. Brit. ISIus., Heterocera, XVI, Il!1. 



Head rather prominent, though not large, with a pointed tul't between 

 the auteuuiX'. Eyes prominent, globose, naked. Ocelli small, situated 

 close to the compound eye, rather well removed from the base of the 

 antenna'. Tongue long and strong. Anteinue rather long, in the female 

 siini)le, with small lateral ciliations; in the male they are either furnished 

 with longer lateral bristles, with or without other ciliations, or arc 

 roughly vScaled only, without special modification at l)asal third in either 

 case. Palpi long, rather closely scaled, ujt and back laiived, sickle- 

 sliaped, the third joint pointed and not muih slioiter than the second. 

 Body moderate, more robust in the female; abdoimMi (piite slender and 

 considerably exceeding anal angle of secondaries in the male; more 

 robust, scarely exceeding the secondaries in the female. The legs are 

 long and stout with the usual spurs-of the middle and posterior pair. 

 The anterior legs of the male are modified. The coxa is ipiite st<uit 

 with rather a s])arse clothing of specialized hair towai<l the {i[). Tro- 

 chanter normal, not elongated. Femur unusually' long, untufted. Tibia 

 very short, but with a very long process, which covers a pencil of yellow 

 or blackish hair. The first tarsal joint is long and stout, equaling in 

 length the tibial process, and the other joints are normal in length. 

 Wings proportionate; venation normal. Primaries elongate, veiy nar- 

 row at base, m the male set well back (»ii the thoiax; the eosta some- 



