116 HETEROCERA. 
2. Gnophela morrisoni*, sp. n. (Tab. XII. fig. 7.) 
Allied to and about the same size as G. hopfferi, but differs from that species in the ground colour of the wings 
being deep glossy blue-black, instead of dull black; the pale-coloured markings are much larger and more 
transparent, and the apical band consists of four distinct spots instead of three, as in G. hopfferi. 
Hab. Mexico, Northern Sonora (Morrison). 
This insect is very closely allied to G. hopfferi; in fact I think it is probably a 
southern form of that species, specimens of which, collected by Lord Walsingham in 
California, are before me, but it is always easily distinguished from G. hopfferi by the 
above-mentioned differences. Of G. morrisoni I have fifteen examples before me sent to 
Mr. Godman and myself by the late Mr. H. K. Morrison, after whom I have named it. 
Subfam. ARCTIINA. 
LEUCARCTIA. 
Leucarctia, Packard, Proc. Ent. Soc. Phil. iu. p. 124. 
This genus is closely allied to Spilosoma; the species are, however, mostly larger in 
size, and possess a different style of coloration, besides which there are other important 
characters that warrant its separation from that genus. 
1, Leucarctia acrea. 
Bombyx acria, Drury, Ill. Nat. Hist. 1. t. 3. £. 2. 
Bombyx caprotina, Drury, Il. Nat. Hist. i. t. 3. £.3; Cram. Pap. Exot. iii. t. 287. f. C. 
Phalena acria, Smith, Lep. Ins. Georg. 11. p. 133, t. 67. 
Estigmene acria, Hiibn. Samml. exot. Schmett. i. t. 191; Verz. bek. Schmett. p. 184. 
Arctia pseuderminea, Harris, Mass. Ag. Rep. p. 382, t. 1. 
Arctia acria, Harris, Cat. Ins. Mass. p. 591. 
Spilosoma acrea, Walk. Cat. iil. p. 667; Duncan, Nat. Lib. xxxii. p. 171, t. 20. figg. 1, 2,3; Clem. 
Proc. Acad. Nat. Sci. Phil. p. 531; Harris, 1. c. 3rd ed. t. 6. figg. 9, 10, fig. 169, larva; Morris, 
Syn. Lep. N. Am., Suppl. p. 342. 
Leucarctia acrea, Pack. Proc. Ent. Soc. Phil. in. p. 124; Stretch, Illust. of Zyg. and Bomb. 
N. Am. p. 99, t. 4. figg. 1, 2, 3, t. 10. f. 6, larva. 
Hab. Norru America.—MeExico, Presidio (Forrer), Cordova (Riimeli), Jalapa (Hoge). 
This species is a very common one throughout North America, and its range extends 
as far south as Mexico. It appears to be a very variable insect: in some specimens 
before me the black spots are almost absent, in others they are exceedingly well defined ; 
but in a long series of specimens I find every grade from a white wing thickly spotted 
with black to a wing almost white and with exceedingly few spots; in fact I cannot 
detect any difference whereby to separate them, although if I took individual specimens 
I might easily describe them as distinct species, 
* The name of this species is erroneously given as Gonophela morrisont on the Plate. 
