38 



Drepana arcuata, race alaskensis, nov. 



This is the Alaska race of sictilifer, and differs from ordinary siculifer in 

 that the markings are more intense; and all of the shadings are more pro- 

 nounced so that the central area of the primary is considerably darker than 

 the basal or outer areas, giving the insect quite a different general appearance. 

 Size. 40 mm. 



Type locality and number and sexes of types: Ketchikan, Alaska, Holo- 

 type $, no date; Allotype ?, July 8th-15th. 



Drepana arcuata alaskensis form grotei, nov. 



Primaries ground color deep brown, suffused with gray scales. All ordi- 

 nary lines similar to geniculata but wider and more suffused. Subrenifonn 

 large, about 1 mm. in diameter. Secondaries similar to geniculata but lack the 

 yellow which is replaced by grayish-brown. 



We take this to be the geniculata form of alaskensis. From Eastern geni- 

 culata it is easily separated by its larger size ; about 35 mm. as against 28-30 mm. ; 

 its dark color, and large subreniform. From alaskensis it differs in the same 

 way geniculata differs from arcuata. 



Type locality and number and sexes of types: Ramparts, Alaska; Holo- 

 type B, 16th-23rd May; Paratype S, 24th-31st May. 



Drepana bilineata. Pack. 



1864, Pack., Proc. Ent. Soc. Phil. Ill, 376, Edapteryx. 



A very distinct species impossible to mistake for any other. The light yel- 

 lowish to brownish coloration of the primaries and pale secondaries immediately 

 separate it from its European ally D. lacertinaria, L. The primaries are deeply 

 falcate below the apex, and covered with numerous brown strigae. Type local- 

 ity: Mass. We have this form from Mass., N. H., and N. Y. There is also a 

 Quebec specimen standing in the collection with the central area of the primaries 

 conspicuously darker than the basal or outer areas, but it is a unique and unless 

 more be obtained feel that we had best apply no name to it. 



Drepana bilineata form levis, Hudson. 



1893, Hudson, Can. Ent., XXV, 24, Prionia. 



This form lacks the brown strigae on the primaries, and is generally some- 

 what smaller than the typical form. It is probably partially seasonal but we do 

 not believe it is entirely so. 



Type locality: Plattsburg, N. Y., 1 5,19. 



We have the form from N. J., Conn., and Quebec. 



