28 ZYGCENIDiE AND BOMBYCIDiE 



egg, about ten months as a larva, since there is but a single brood in 

 the year, and they must hybernate when two thirds grown. It spends 

 about twenty days in the pupa state, and but a few days as a moth." 



2.-CTENTICHA CRESSONANA, (Plate 1, fig. U, 5 .) 



Ctenucha Cressonana, Grote, Proc. Ent. Soc. Phil., Vol. 2, p. 64. 

 [Plate 8, fig. 5, ?.] [1863]. 



"Anterior wings, blackish-brown with the median vein, its two 

 middle branches and the sub-median nervule, striped with white. 

 Costal margin, yellowish white. Exterior margin, fringed with white. 

 Base of the wings tinged with metallic blue. Posterior wings, black- 

 ish blue, fringed with white. Collar and thorax, metallic blue; tegulae, 

 bordered with white. Head, orange, metallic blue betw-een the eyes. 

 Palpi, yellowish, terminal joint, black. Abdomen, metallic blue 

 above, blackish beneath. Legs and antennae, black." 



Grote [loc. cit.] 



Expanse of tvings. 1.90 inches. Lerigih of body, 0.75 inch. 

 Habitat. — Colorado Territory. [Coll. Ent. Soc, Phil., and Stretch.] 

 For my specimen of this fine species I am indebted to my friend, 

 Mr. T. L. Mead. It was named by Mr. Grote after Mr. E. T. Cresson, 

 of Philadelphia. In relation to the affinities of this species, Mr. Grote 

 says: [loc. cit.] " This species is intermediate between C. Latreillana, 

 Kirby, [C. Virginica, Charp.] and C. Venosa, Walker, and very distinct 

 from either. In size it approaches the former, and in the shape of 

 the wings and markings of the anterior pair, the latter species. In C. 

 Venosa, the stripes on the anterior wings are, however, yellow, and 

 there is a third on the sub-costo inferior nervule, which is wanting in 

 C. Cressonana." There are other slight difi'erences in the coloration 

 of the palpi and fringes, but the markings of the anterior wings sepa- 

 rate it readily from its congeners. 



3.-CTENUCHA MULTIFARIA, (Plate l. fig. 11.) 



Apistosia .<=> multifaria, Walk., C. B. M. Lep. Het., Pt. 2. [1854]. 

 Glaucopis riibroscapus, Menetries, En. Cor. Am. Mus. Pet, p. 142, 



Plate 14, fig. 7- [1855]- 

 Apistosia ? jnul/ifaria, Clem. App. Syn. Lep. N. Am., p. 302. [1862.] 

 Ctenucha rubroscapus, Grote, Trans. Am. Ent. Soc. p. 33L [1868-9] . 

 Ctenucha 7-ubroscapus, Boisd., Am. Soc. Ent. Bel., p. 71. [1868-9]. 

 " (3 . Head, crimson on the vertex, occiput, and between the eyes; 

 front, black. Labial palpi, entirely crimson, except the short terminal 



