262 



UNITED STATES NATIONAL MUSEUM BULLETIN 207 



differences seem to indicate that insignatella is a good 

 species and not a mere color form, 



543. Cactobrosis strigalis (Barnes and McDunnough) 

 Figures 526, 1053 



Eusophera strigalis Barnes and McDunnough, Canadian Ent., 



vol. 44, p. 127, 1912; Contributions, vol. 1, No. 4, pi. 1, 



fig. 14, 1912. 

 Cactobrosis strigalis (Barnes and McDunnough), Cheek list of 



the Lepidoptera of Boreal America, No. 5697, 1917. — Dyar, 



Ins. Insc. Menstr., vol. 13, p. 224, 1925; Proc. Ent. Soc. 



Washington, vol. 30, p. 136, 1928. — Heinrich, Proc. U. S. 



Nat. Mus., vol. 86, p. 400, 1939.— McDunnough, Check 



list. No. 6287, 1939. 



Male: Antenna strongly serrate. Palpi, head, thorax, 

 and forewing grayish fuscous sprinkled with whitish 

 (the ends of the scales white) making the ground color 

 a pale slate-gray. Forewing with the veins outlined in 

 black, the strongest black line being that along upper 

 vein of cell and vein 6 ; transverse lines and discal mark 

 absent; no dots along termen. Hind wing white, semi- 

 hyaline, with a faint fuscous shade bordering costa, and 

 a fine fuscous line along termen for a short distance from 

 apex. Tufts on eighth abdominal segment weak. Alar 

 expanse, 30-43 mm. 



Male genitalia with vinculum moderately long, but 

 considerably shorter than in other species of Cactobrosis; 

 aedeagus also shorter. 



Female: Similar to the male in color and markings 

 except that hind wing is more or less suffused with 

 smoky fuscous beyond the base, especially along the 

 veins and termen. Alar expanse, 33-44 mm. 



Female genitalia with sclerotized plates on dorsal wall 

 of ductus bursae behind the genital opening well de- 

 veloped, but with opposing ventral sclerotized plate 

 absent, replaced by minute scobinations; ductus bursae 

 shorter than in other Cactobrosis species ; bursa copula- 

 trix not entirely smooth, having a few weak scobinations 

 toward ductus. 



Type locality: Eureka, Utah (type in USNM). 



Food plant: Echinocereus rigidissimus (Engelmann), 

 E. pectinatus (ScheidweUer), and probably a number of 

 other species of Echinocereus. 



Distribution: United States: Utah, Eureka (Aug., 

 Sept.). Dividend (Sept.); California, San Gorgonio 

 Pass (July) ; Arizona, Tucson (Apr., July) ; Texas, Brew- 

 ster County (July, Aug.), Alpine (Apr.). Mexico: 

 Distrito Federal, Mexico (National University, male 

 reared from E. pectinatus, Jime 3, 1931). 



In a number of respects (its shorter vinculiun and 

 ductus bursae, its weak abdominal tufts, and its par- 

 tially scobinate bursa copulatrix) this species fits badly 

 into Cactobrosis. Eventually it may need a separate 

 generic designation, but this had better be postponed 

 until the life histories of the other species of Cactobrosis 

 are more fully known. 



The forewing markings of strigalis resemble those of 

 Euremberga leuconips (Dyar). The latter, however, is 

 easily distinguished by its squamous maxillary palpi. 



Genus 152: Drescomopsis 



[Venational division A. Forewing with 11 veins: 4 and 5 approxi- 

 mate or connate. Hind wing with vein 2 from the lower outer 

 angle of cell; discocellular vein curved. Male genitalia with 

 transtUla complete; harpe with base of sacculus produced and 

 bearing stout hair tuft. Labial palpus upturned.] 



152. Genus Drescomopsis Dyar 



Drescomopsis Dyar, Ins. Insc. Menstr., vol. 7, p. 61, 1919. (Type 

 of genus: Drescomopsis subelisa Dyar.) 



Tongue well developed. Antenna pubescent; shaft 

 of male slightly swollen at base, otherwise simple. La- 

 bial palpus upcurved, broadly scaled; reaching a little 

 above vertex. Maxillary palpus squamous, appressed 

 to face. Forewing smooth except for a projecting tuft 

 of rough scales from base of costa in male; 11 veins; vein 

 2 from very close to lower outer angle of ceU ; 3 from the 

 angle, shortly separated from 4 ; 4 and 5 connate or very 

 closely approximate at bases; 6 from below upper angle 

 of cell, straight; 8 and 9 stalked; 10 from the cell, ap- 

 proximate to the stalk of 8-9 for some distance; male 

 without costal fold. Hind wing with vein 2 from lower 

 outer angle of cell; 3 and 5 shortly stalked; 7 and 8 ap- 

 proximate (or contiguous) for a short distance (less than 

 half their lengths) beyond cell; cell about one-third the 

 length of wing, shorter in male than female; on under 

 side of male wing, between cell and vein Ic, an elongate 

 pocket enclosing hair tuft and a mass of modified scales; 

 discocellular vein curved. Eighth abdominal segment 

 of male with a pair of ventrolateral hair tufts and ster- 

 nite produced as a sclerotized pocket (projecting into 

 abdomen). 



Male genitalia with apical process of gnathos a slen- 

 der, elongate, flattened hook. Uncus rounded, hook- 

 like. TranstiUas complete, thrust anteriorally from 

 costal margins of harpes. Harpe broad, apex broadly 

 and evenly rounded; clasper appressed to harpe; base of 

 sacculus produced and bearing a stout hair tuft. Anel- 

 lus a slightly curved, elongate plate. Aedeagus slender, 

 smooth, moderately long, sharply bent beyond one- 

 third from base; penis without cornuti or other appreci- 

 able armature. Vinculum long, narrow, strongly 

 arched dorsally, strongly sclerotized only on lateral and 

 terminal margins; constricted laterally and flaring to a 

 broad lateral margin. 



Female genitalia with signum consisting of a de- 

 pressed, tear-shaped patch of short scobinations with a 

 sparser scattering of weaker scobinations in surrounding 

 area (signa shown in frontal and lateral views in figs. 

 761 and 762); bursa otherwise simple; ductus bursae 

 shorter than bursa, simple; genital opening simple; duc- 

 tus seminalis from bursa near its jimction with ductus 

 bursae. 



The genus is very closely related to and apparently 

 derived from Drescoma in group I, agreeing with it on 

 most important genitalic characters, differing chiefly in 

 the absence of vein 4 of hind wing. 



Contains but one tropical American species. 



I 



