87 



is more regular and distinct than usual, owing to the obsolescence of the 

 usual scalloped shades or lines on each side. 



Compared with two European alpine examples received from Dr. Stau- 

 dinger and Professor Zeller, there are no apparent differences either in size 

 or markings. 



Epirrita dilutata Hiibner. Plate 10, last fig. 



" Geometra dilutata Boikb., Eur. Schm., v, 290, 1794." 



" Hiibn., Schm. Eur., tab. 36, fig. 188, 1796." 

 Epirrita dilutata Hubu., Tent., 1806-16. 

 Oporinia dilutata Hubu., Vera., 322, 1818. 

 Acidalia dilutata Treits., Schm. Eur., vi (ii), 26, 1828. 

 Oporahia dilutata Step]]., 111., iii, 273, 1831. 

 Larentia dilutaria Boisrt., Geu. Iud., 207, 1840. 

 Larentia dilutata H.-Sch., Schm. Eur., 160, fig. 188, 1847. 

 Oporahia dilutata Steph., Cat. Br. Lep., 198, 1850. 



Gueu., Phal., ii, 262, 1857. 

 Cidaria dilutata Stand., Cat., 80, 1861. 

 Oporahia dilutata Walk., List Lep. Het. Br. M119., xxiv, 1168, 1862. 



10 i. — This is a much larger species than E. cambricaria, but with very 

 similar markings. It may always be distinguished by the simple male antennae. 

 Body and wings pale ash-gray. Fore wings with eight well-defined sinuous 

 or scalloped blackish lines, most distinct on the costa and veins ; the basal 

 line is heavy, and bent rectangularly between the subcostal and median veins ; 

 the next line, rather remote from the basal, curves inward on the subcostal 

 vein, and outward on the median space ; the two lines beyond are approxi- 

 mate, but less sinuous; the fourth line from the base of the wing is broad, 

 diffuse, twice as broad on the costa as the three others ; beyond this line is a 

 clear median space, in the middle of which is the distinct discal dot; beyond 

 are four more or less distinct lines, of which the outer (or submarginal) is 

 most distinct and regularly scalloped ; a marginal row of twin black dots ; 

 fringe whitish. Hind wings with traces of four scalloped lines, the marginal 

 one the heaviest; marginal spots and fringe as in the fore wings ; beneath, 

 the lines on the hind wings are much as above ; but those on the fore wings 

 are obsolete, represented by four costal spots on the outer half of the wing. 



Length of body, c?, 0.45; of fore wing, <$ , 0.75; expanse of wings, 1.60 

 inches. 



Labrador, Moravian Missions (Moeschler) ; Saint George's Bay, New- 

 foundland, " Hew aboard in numbers September "26, 1874'' (Mr. J. Milne); 

 received from Mr. R. McLachlan. 



