26 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Lozxostege coloradensis (Grote and Robinson).—Fernald, 1903, 7m Dyar, U.S. 
Nat. Mus. Bull. 52, p. 382.—Barnes and McDunnough, 1916, Contr. Nat. 
Hist. Lepid., vol. 3, no. 3, p. 191; 1917, Checklist of the Lepidoptera of 
boreal America, p. 131—McDunnough, 1939, Mem. Southern California 
Acad. Sci., vol. 2, p. 12. 
Maue.—Alar expanse 23-31 mm. Frons conical. Antenna weakly 
ciliate. Midtibia incrassate, hair-pencil present, buff. Outer spur 
minute, about one-sixth as long as inner. Color whitish, with a slight 
ochreous tinge. Markings of forewing similar to those of pergilvalis 
but somewhat more ochreous and weaker. Hindwing whitish, sub- 
hyaline, without postmedial and subterminal lines, or the postmedial 
barely discernible. 
Genitalia (fig. 17): Harpe without digitate setae; sacculus with two 
conspicuous subequal spines and an outer cluster of small, subequal 
spines. Aedeagus with distal patch of short, sharp, spinules. 
Fema.e (fig. 123).—Alar expanse 27-31 mm. Color and macula- 
tion asin male. Genitalia (fig. 77): ventral margin of ostium broadly 
concave, shallow; sclerotization laterad of ostium concave, granulose. 
Spinulation of bursa copulatrix conspicuous from origin of accessory 
pouch to junction with ductus bursae. 
Larva.— Penultimate stage, 18 mm. Head pale amber, reticula- 
tion weak; a small fuscous patch at lateral incision on hind margin. 
Body sordid white. Pigmentation of markings of prothoracic shield 
and body pinacula brownish. Thorax: anterior and lateral margin 
of prothoracic shield with a brownish patch at bases of setae Ia, Ib, 
Ic, and IIc; pigmentation discontinuous on dorsum and between 
setae Ia and Ib; posterior margin concolorous with adjacent body 
area, without dark markings; prespiracular shield and pinaculum 
of group VI conspicuously pigmented. Meso- and metathorax 
with pinacula of setae Ia-Ib, Ila-IIb, IV, V, and VI rather large, 
pigmentation strong; pinaculum of seta III smaller, pigmentation 
weaker. Abdominal segments: pinacula of setae I and II of first 
and eighth segments more strongly pigmented than on second to 
seventh segments; pinacula of setae III darkly pigmented and of 
approximately equal size on segments 1-8. Pinacula below level of 
spiracles not pigmented on segments 1-8. Pinacula of ninth segment 
not pigmented. Anal shield without conspicuous markings. 
Luctotypr.—Female, American Museum of Natural History, 
slide no. 22998 Grote and Robinson, present designation. 
TypsE-LocaLity.— Colorado. 
Foop pLant.— Wild sunflower. 
Distripution.—Arizona, Utah, Colorado, Iowa, Kansas, Missouri, 
Oklahoma, and Texas. 
SPECIMENS EXAMINED.— 51. 
