NO. 137(;. LEPIDOPTERA OF THE KOOTENAI DISTIlICT—DYAIi. 927 

 THIODIA PSEUDOTSUGANA Kearfott. 



'rwonly spi'ciiuciis, June 2A^ .Inly 1*, Aiinust 4. 1(> (Kokiinrc Moun- 

 tain). 17. uiul tliivc from Mr. Co('kU''s collfction. Ain'il li». I'.t02, 

 August 1<» (Kitchener (irlacier). Several of the specinicns were I'ound 

 torpid on snow. The larvie weri^ b(niten Fi'oin a spiiicc tree at Powder 

 Creek. 



Lorra. — Head t)iloh('(l. eh)ngate, reddish hiteous. sutures and jaws 

 dark brown, eye l)lack, antenna' white at base, bhick at tip. Cer- 

 vieal sliiekl hu'ge, bhick, shadino- ])ah'r before, rather })roadly bisected. 

 Later head red brown, cpistonia and bases of antenine white. Cer- 

 vical shield o-reen, except the ])lack posterior rim. Body oi-ccn with- 

 out marks. 



THIODIA ARCTOSTAPHYLANA Kearfott. 



Seven specimens, all raised from larva' on bearberry {.lrcfn.-<tt/j^/ii//<)t< 

 uva-urd). They emcrg-ed late in August. The larvae are sordid whitish" 

 with red brown heads and spin uj) the ends of tlie shoots of the plant, 

 eating- out the terminal bud. I found the same larva' two years 

 previously high on the foothills back of Golden, Colorado, where the 

 bearberry grows. These moths also emerged in August. 



Larva. — Head rounded, apex in joint 2, shining })rown, clypeus 

 high. Cervical shield rather large, shining luteous, transparent, 

 shading to black l)ehind. Anal plate brown-black; some small shields 

 on joint 13 anteriorly, a single dorsal and a subdorsal. Body robust, 

 tapering at the ends, not very active; translucent greenish yellow, 

 food opaquely green; tubercles small but distinct, blackish luteous, 

 ia+ib, iia+ii)), iv+v, i dorsad to ii. Feet normal, short, the thoracic 

 ones black. 



THIODIA ELONGANA Walsingham, var. TRANSVERSA Walsingham. 



Ten specimens, June S (Ainswoi-th). and one tiom Mr. Cockle's 

 collection, June 30, 1902. Three are <l(»i(j(iu(i, seven of the form 

 transversa. I can not regard these as distinct species. They were 

 flying connnonly in a dried-out swamp near Loon Lake abox e Ains- 

 worth, but alighting among dead brush were \-ery ditlicult to cajjture. 



THIODIA ARTEMISIANA Walsingham. var. INFIMBRIANA, new variety. 



Three specimens, June 23, August !> (South Fork Creek), and two 

 from :VIr. Cockle's collection, August 4 and August 17. 1!«02. The 

 specimens are a little smaller than the typical foi'm. the dark bands on 

 the wino- rather less obliiiue and the fringe light gray like the bands, 

 not discolorously bright brown. 



Tj/jx'.—Cxxt. No. 7651>, V. S. National Museum. 



