260 



tnsriTED STATES NATIONAL MUSEUM BULLETIN 207 



hemilutella. The moth can be easily identified by the 

 rust-red cilia and blotches on the forewing. It, so far, 

 is known only from the type series from Tucumdn. 



151. Genus Cactobrosis Dyar 



Cactobrosis Dyar, Proc. U. S. Nat. Mus., vol. 47, p. 406, 1915; 

 Proc. Ent. Soc. Washington, vol. 30, p. 135, 1928.— Hein- 

 rich, Proc. U. S. Nat. Mus., vol. 86, p. 394, 1939. 



Tongue well developed. Antenna of male with a 

 series of modified, papUlalike setae on the inner sides of 

 several basal segments of the shaft, bipectinate (Jer- 

 naldialiSjlongipennella) or strongly serrate and pubescent 

 (maculijera, strigalis); antenna of female simple and 

 shortly pubescent. Labial palpus uptm-ned in the 

 male, oblique in the female. Maxillary palpus filiform. 

 Hind wing with veins 7 and 8 anastomosing beyond 

 the cell; 3 and 5 shortly stalked. Eighth abdominal 

 segment bearing a pair of ventrolateral hair tufts (the 

 tufts long and dense except in strigalis). 



Male genitaUa with apex of gnathos large, bifid; apex 

 of harpe evenly rounded; vinculum long (moderately 

 long in strigalis); aneUus with base of plate narrowly 

 sclerotized, arms long, slender, slightly twisted ; aedeagus 

 long, stout (shorter and less stout in strigalis); penis 

 more or less densely pubescent (armed with short, hair- 

 like spines). 



Female genitalia without signum; ductus bursae long, 

 finely scobinate only at genital opening or (in strigalis 

 only) sparsely so at junction of bursa copulatrix and 

 ductus bursae, with two small sclerotized dorsal plates 

 and a single ventral plate at genital opening (the ventral 

 plate absent in strigalis); bursa copulatrix large, smooth 

 (except in strigalis, in which it has a few minute scobina- 

 tions) ; ductus seminalis from near end of bm-sa. 



Larvae bluish, not banded or conspicuously spotted; 

 with two setae in group VII on abdominal segments 7 

 and 8; gregarious feeders in Ferocactus, Echinocereus, 

 Peniocereus, and, probably, Carnegiea. 



Eggs laid singly. 



The genus as here defined is distinguished from aU 

 other genera of the cactus-feeding group by its filiform 

 maxillary palpi. Zophodia, which it resembles in most 

 structural characters, is not a cactus-feeding genus, has 

 the male antenna unserrate, the labial palpus of female 

 porrect, and a small signum in the biu-sa copulatrix. 



Five species are recognized as belonging to the genus. 

 They are fairly easy to distinguish but subject to much 

 individual variation in wing markings. 



The known distribution is the southwestern part of 

 the United States and Mexico. 



539. Cactobrosis fernaldialis (Hulst) 

 FiGTJRES 73, 524, 1049 



Megaphycis fernaldialis Hulst, Trans. Amer. Ent. Soc, vol. 13, 

 p. 163, 1886. 



Euzophera gigantella Ragonot, Nouv. Gen., p. 32, 1888; Mono- 

 graph, pt. 2, p. 51, 1901. — Dyar, Proc. Ent. Soc. Washing- 

 ton, p. 158, 1904. 



Melitara fernaldialis (Hulst), Phycitidae of N. Amer., p. 172, 

 1890; U. S. Nat. Mus. Bull. 52, p. 429, 1903.— Schwarz, 



Psyche, vol. 8, p. 15, 1901.— Hunter, Pratt, and Mitchell, 

 U. S. Dept. Agr. Bur. Ent. Bull. 113, p. 29, 1912. 



Honora cinerella Hulst, Journ. New York Ent. Soc, vol. 8, 

 p. 223, 1901; U. S. Nat. Mus. Bull. 52, p. 433, 1903. 



Melitara fernaldalis Dyar, Proc Ent. Soc. Washington, vol. 7, 

 p. 36, 1905 (misspelling tor fernaldialis Hulst). 



Cactobrosis fernaldalis (Dyar), Proc. U. S. Nat. Mus., vol. 47, 

 p. 407, 1914; Ina. Inso. Menstr., vol. 13, p. 223, 1925 (in 

 part); Proc. Ent. Soc. Washington, vol. 30, p. 135, 1928 

 (in part). 



Cactobrosis fernaldialis (Hulst) Heinrich, Proc. U. S. Nat. Mus., 

 vol. 86, p. 386, 1939.— McDunnough, Check list. No. 

 6283, 1939. — Dodd, Biological campaign against prickly- 

 pear, Brisbane, Australia, p. 40, 1940. 



Male : Antenna bipectinate. Palpi, head, and thorax 

 grayish fuscous dusted with white. Forewing grayish 

 fuscous dusted with white and more or less blotched 

 with black; some specimens with a faint ocherous- 

 fuscous tint in the middle of the cell and on the area 

 between vein lb and the cell; normally with antemedial 

 and subterminal transverse markings indistinct, but 

 indicated by whitish angulate and dentate bands shaded 

 inwardly and outwardly by black; a blackish shade at 

 end of cell, often extending to costa; below it on inner 

 margin a similar dark spot; veins 2 to 8 faintly lined 

 with black and in many specimens the fold to a little 

 beyond its middle. Hind wing white, semihyaline, 

 shaded in costal area above vein 6 and cell with pale 

 fuscous, with some fuscous scaling on the veins and a 

 fine fuscous line along termen; anal margin and adjoin- 

 ing cilia faintly ocherous; cilia otherwise white, with a 

 narrow, fuscous subbasal fine. Alar expanse, 36—47 

 mm. 



Male genitalia essentially like those of longipennella 

 but somewhat larger, in size and habitus like those of 

 maculijera. 



Female : In color and markings like the male except 

 that there is never any black streak on the fold of the 

 forewing; some specimens are heavily dusted with black 

 over the entire base of the forewing as far as the ante- 

 medial line; others have the transverse lines and con- 

 trasted dark spots almost obliterated and the wing of a 

 pale slate color with only the faintest remnants of the 

 normal markings. Alar expanse, 34-50 mm. 



Female genitalia with the sclerotized ventral plate 

 in ductus bursae at opening smaller than those in 

 longipennella, insignatella, and maculijera. 



Type localities: Arizona {fernaldialis, in AMNH, 

 ex Rutgers; gigantella, in Paris Mus.); Santa Eita Mts., 

 Ariz, (cinerella, in USNM). 



Food plants: Ferocactus wislizeni (Engelmann) and 

 probably other species of Ferocactus; Peniocereus greggii 

 (Engelmann) ; Carnegiea gigantea (Englemann) ; Homaio- 

 cephala texensis (Hopff er) . 



Distribution: Arizona, Catalina Springs (Apr.), 

 Oracle (July), Tuscon (June), Baboquivari Mts. (Apr., 

 May, June, July, Aug., Oct., Nov.), Christmas, Reding- 

 ton, Pinal Mts., Santa Rita Mts. (May, June), Hua- 

 chuca Mts. (Aug.), Douglas (Apr., May), Mohave 

 County (May), Sells Post Office (Indian Oasis, Apr.), 

 Dewey (June), Maricopa County (July), "en route from 



