No.i37r.. LEriDOI'TEUA OF THE KOOTESM IHSTnirT—DYAJL 823 



else black. Anal flap with three similar lines. A bright white and 

 lilaceous speckled transverse bar on joint 12. Subdorsal line lilaceoiis 

 and white dotted, broken into sliohtly oblique seo-nientarv ))ars. shaded. 

 Sides liohter than dorsum, black penciled on a whitish lilaceous 

 oround, solidly l)lack Ixdow. A narrow, crinkled, pale yellow stitr- 

 matal line representino- the upper edo-e of the substio-matal band, the 

 space ])elow like the lateral area, black on lilaceous. Thoracic feet 

 reddish, abdominal ones heavily black marked, the anal pair yellow 

 lined before. Tubercles small, obscure; seta3 moderate, pale, straij^ht. 



PERIDROMA ASTRICTA Morrison, var. SUBJUGATA Dyar. 



Sixty-one specimens, July 19, 25, 27, 29 (Bear Lake), 30, 31, August 

 3, 5, 6, 11, 13, 16, 17. This is obviously a local foi-m of the eastern 

 astricta^ yet it comes remarkably near to nigra Smith in a[)pearancc. 

 It retains always some of the violaceous ground color of astricta, 

 which, in nigra ^ is transformed into an ochraceous powdering. 



Eggs. — Laid in a high pile three or four layers deep centrally. Two- 

 thirds spherical, the base more or less flattened, somewhat irregular. 

 Ribs about 40 around the margin, diminishing by confluence, running 

 almost to the raised micropylar rosette. Cross-stria": flne, slight, 

 forming cells about twice as wide as high. Light yellow, later with a 

 dark red ring and spot; diameter 1 mm. 



Stage L — Head rounded l)ilobed, brown, clypeal sutures and tuber- 

 cular spots blackish. Body normal, whitish, joints 5-6 and 12 

 enlarged; cervical shield bisected, blackish at the edges and tubercles. 

 Tubercles round, black, distinct; thoracic feet blackish ringed; leg 

 shields dusky; seta? black, pointed. liater green from the food, a 

 whitish stigmata! stripe edged with dark above and a little brown also 

 sulxlorsally and subventralh'. 



Stage II. — Head bilobed, shining greenish brown with obscure spots 

 on the tubercles; width 0.6 mm. Body moderate, joint 12 scarcely 

 enlarged; greenish, shaded in brown, dorsal line oi)a(iue dull white, 

 divided in the incisures and a little constricted centi-ally on the seg- 

 ments; subdorsal line narrow; lateral line a row of dull white spots. 

 Below it a heavy dark vinous shade. Su])stigmatal band pun> white: 

 subventral region greenish, like the dorsum. Tubercles small, round, 

 black; feet pale; cervical shield concolorous, but deflned by a dark line. 



Stage III— Head brown, slightly reticulated; width o.S nun. Body 

 moderate, joint 12 enlarged; light fleshy brown dorsally with dorsal 

 and subdorsal white lines, slightly dark l)rown edged, forming traces 

 of a lattice marking with lighter areas about tubercle i. Sides dark 

 brown; lateral line obsolete; substigmatal band ])ure white; snl)ven- 

 tral region i)ale brown, fading to the venter. Feet bi-ownish; no 

 shields; tubercles small, round, black; setiv minute. 



Stage /F.— Head rounded bilobed, shining light brown with darker 



