174 Journal of Agricultural Research voi. xviii, no. 3 



Female. — Darker portion of palpi, head, and thorax pale or dull creamy ochreous. 

 On forewing outer margins of transverse antemedial and transverse postmedial lines, 

 terminal margin, and area between obicular and discal mark whitish ochreous. Post- 

 median fascia of hindwing whitish ochreous. Darker portions of forewing and hind- 

 wing pale gray, grayish ochreous, or ochreous gray tinged with ferruginous. Genitalia 

 as figured (PI. 8, A, B); genital opening without strong chitinous anterior margin; 

 chitinized plate, posterior to genital opening, well developed, nearly square. Alar 

 expanse, 18 to 34 mm. 



PUPA 



Fourteen to 16 mm. long; yellowish brown, darker towards extremities, cephalic 

 end blackish brown; thorax but slightly humped; abdominal spiracles small, oval. 

 Edges strongly chitinized, blackish brown; front smooth; cremaster (PI. 9, F) longer 

 than broad. 



LARVA 



Full grown 23 to 25 mm. long by 3 to 3.5 mm. broad. Body sordid white, shading 

 to smoky fuscous on heavily granulose dorsal and lateral areas; smoky color forming a 

 distinct, broad, longitudinal band along entire dorsum with a more distinct and darker 

 narrow central band; creases of folds and areas immediately surrounding chitinized 

 tubercles clear white; above and behind abdominal seta III and before abdominal 

 seta I some of the muscle attachments are indicated by lines or clusters of white spots 

 more or less fused.^ 



Chitinized areas of the body strongly pigmented; thoracic shield light yellow, 

 laterally and caudally bordered by a narrow band of smoky fuscous and more or less 

 spotted with brownish, above seta 11" the spots fusing into one or two more or less 

 extended and conspicuous splotches; anal shield yellow, irregularly spotted, espe- 

 cially near margins, with smoky fuscous; chitinized areas of tubercles moderately 

 large, irregularly oval or circular, yellow with a more or less extended border of smoky 

 fuscous, which sometimes on those above the spiracle covers the entire tubercle; 

 tubercle I of abdomen with one or two fuscous spots cephalo-laterad of the seta; dorso- 

 caudadof the spiracle on proleg bearing abdominal segments 3 to 6 a small, chitinized, 

 brownish, thornlike projection (PI. 11, G, mt), quite plain in some specimens.^ Setae 

 brownish at base, pale towards tip, slender. Thoracic legs yellow; claws brown. 

 Crochets of prolegs unevenly triordinal; 32 to 46 (averaging 40); brown. Spiracles 

 broadly oval; chitinous ring light brown. 



Head brown, more or less mottled with blackish, in some specimens giving the whole 

 liead a blackish brown appearance ; ocellar pigment black and in the form of a band 

 under the ocelli, continuous. Anterior setae A^ and A'^ and puncture A^ in a line 

 or with A" a trifle postero-laterad of A", not postero-dorsad ; A^ somewhat nearer 

 to A^ than to A^, AS A^, and A^ forming a decided obtuse angle; ocellar puncture O^ 

 closely approximate and directly posterior to ocellus VI. Labium and maxillae 

 as figured; no decided hump in shoulder of stipes maxillaris; chitinized area of pal- 

 piger maxillaris yellow, strongly shaded with black. Mandible five-toothed; nearly 

 square; distal tooth small and pointed; median edge outwardly angulated. 



' These are the clear spaces referred to by Miss Mosher (op. ax.) and one of the characters which she uses 

 to distinguish Pyrausta nubilalis from the so-called P. pcnitalis {ainsliei). The writer has been unable 

 to find any real, consistent difference in this character between the two species. In some forms (particu- 

 larly certain Phycitinae — Dioryctria and Pinipestis, for example) the points of attachment of the muscles are 

 pigmented and slightly chitinized, forming a series of dark-colored pits, which are quite characteristic. 

 Here only a few of the attachments are indicated by pits or spots, and these are colorless and more or less 

 lost in the clear spaces of the folds indicating the limits of the body areas. 



2 Miss Mosher (op. QT.) refers to this structure as a sensory pore. It is in fact merely a chitLnous support 

 at the point of attachment of one of the strong proleg muscles and similar to the chitinization in the center 

 of the proleg itself. 



