130 



form PUNCTicosTATA Dyar. 



1921, Dyar, Ins. Insc. Menst., IX, 138, Perigrapha. 



The authors have examined the types of ferrigera and puncticos- 

 tata at the National Museum, and Mr. Hill's photograph of strigatteria 

 appears excellent. All names are apparently conspecific, there being 

 only one known species from Boreal America in the Perigrapha- 

 Orthosia groups possessing the costal white spots. 



The crest on the dorsum of the first abdominal segment is a very 

 evanescent character ; all fresh specimens of the various species appear 

 to possess it and all rubbed specimens to lack it. 



In general, California specimens are somewhat lighter in build 

 with the markings somewhat less intensified than on Vancouver speci- 

 mens, but intermediates occur; in fact hardly any two specimens are 

 absolutely identical. 



The name puncticostata may be used for the form with reduced 

 or poorly defined maculation and no trace of dark scales on the veins 

 of the primaries, the veins of the type of ferrigera being somewhat 

 darkened. 



Orthosia mediomacula sp. nov. 



$ : Antennae shortly bipectinate. Head, palpi, tegulae, patagia, thorax 

 and abdomen ochreous ; somewhat tinged with rufous and dulled by gray. Pri- 

 maries : grayish-fawn color, very even and smooth in appearance, the costal 

 margin slightly tinged with ochreous ; basal line not present ; t. a. faint, gem- 

 inate, blended with the ground, mainly visible due to slightly lighter filling but 

 even this obscure ; appearing as a semicircle from costa to inner margin ; 

 claviform and orbicular absent; median shade black, strong, rather broad, waved, 

 oblique outward from costa thru base of reniform to the lower end of the cell, 

 thence inwardly oblique to inner margin ; the only conspicuous marking on the 

 insect; t. p. line similar to t. a. line, but somewhat more distinct, obliquely and 

 outwardly rounded to vein 4, thence obliquely and inwardly rounded to the 

 inner margin; reniform thin, upright, constricted centrally, outlined by pale; 

 s. t. line indistinct, marked by faint dots ; fringes slightly paler than the ground 

 color with a faint ochreous cast. Secondaries : unicolorously fuscous with a 

 darker discal mark and pinkish fringes. Beneath, grayish tinged with some 

 ochreous and rufous, v/ith an indistinct common line; and black discal marks, 

 the discal marks on the secondaries distinct. 



Genitalia: valve lobate, without the dor so-caudal prolongation common to 

 most species of this group. 



9 : Antennae very finely clothed with appressed cilia, with longer setae 

 to the joints, which are bead-like, but not serrate. Head, palpi, tegulae and 



