Phyllonorycter apicinigrella (Braun 1908)

Phyllonorycter apicinigrella (Braun)

Lithocolletis apicinigrella Braun, 1908:307; 1914:114, 156.—Meyrick, 1912a:32; 1912b:7.—Barnes and McDunnough, 1917:187.—McDunnough, 1939:96.

Phyllonorycter apicinigrella (Braun).—Ely, 1918:62.—Davis, 1983:10.

ADULT (Figure 41).—Length of forewing: 2.7–3.8 mm. Small moths with slender, mostly pale ochreous forewings with a darker brown, basal costal half and nearly black terminal band. Male genitalia with asymmetrical valvae.

Head: Vertex rough, with a mixture of dark brown to cream, piliform scales; frons smooth, with broad, lustrous white to cream white scales. Antenna with dorsal scales smooth, mostly light fuscous except white at base and apical one-fifth; venter entirely white; length about 0.8× that of forewing. Labial palpus white.

Thorax: Pronotum cream to brownish ochreous. Venter lustrous white. Forewing unusually marked, without striae; predominantly pale ochreous with a large dark brown costal spot at basal one-third and nearly black terminal band; apex of discal cell sometimes suffused with light brown; fringe mostly pale gray except for apical suffusion of black extending from terminal band. Hindwing pale gray. Legs mostly shiny gray dorsally and white ventrally; tibial and tarsal banding very faint; hindleg mostly unicolorous, white to cream white.

Abdomen: Light brown with slight golden luster dorsally, mostly white to cream ventrally; without conspicuous sex-scaling. Eighth sternum of male moderately long and broad, length 1.6× width; apex rounded (Figure 267).

Male Genitalia (Figures 266, 268): Vinculum short broadly V-shaped. Valvae asymmetrical; left valva broadest at middle, tapering to apex with an elongate, curved, subapical spine; right valva slender throughout, less than 0.25× the width of left valva at middle, without prominent spine. Aedoeagus slender, approximately 0.9× the length of valva and 0.8× the length of eighth sternum, with a subapical spinose process.

Female Genitalia (Figures 441, 442): Lamella antevaginalis broader than long. Accessory bursa with moderately long duct, approximately 0.5× the length of ductus bursae, and arising near caudal end of latter where they empty into a broad antrum. Signum a single round disk bearing a single spinose papilla.

LARVA.—Not examined.

PUPA (Figures 224–232).—Maximum length 3.5 mm; width 0.7 mm. Vertex with triangular cocoon cutter similar to P. apparella, but with pore located more posteriorly (Figures 224–226). Forewing extending to A8, antenna to middle of A8, and hindleg to middle of A9. Dorsum of A2–A8 almost completely covered with dense concentration of small to minute, scattered spines, the largest situated cephalad (Figure 227); intersegmental surfaces smooth, without reticulate pattern (Figure 228). Caudal half of sternum A7 smooth, without spines or raised triangular area. Caudal margin of A10 slightly concave and smooth (Figure 231); cremaster consisting of a single bilateral pair of moderately large hooks (Figure 232). A9 with sternum abruptly constricting to A10 (Figure 229).

TYPE.—Lectotype, ; Alameda Co. California, iss VII.20, G.R. Pilate; B.311; genitalia on slide DRD 3640; designated by D. Davis; (ANSP).

HOSTS (Table 1).—Salix lasiandra Bentham, Salix sitchensis Bongard, Salix sp.

FLIGHT PERIOD.—May, mid-June to mid-September; apparently either bi- or trivoltine.

DISTRIBUTION (Map 6).—Along the western coast of the United States from San Luis Obispo County, California, north to Whatcom County in extreme northwestern Washington.

MATERIAL EXAMINED.—UNITED STATES: CALIFORNIA: Alameda Co.: 1 (paralectotype), e. 16 Jun 1908 [e.= emerged], 1 (lectotype), 1 (paralectotype), 20 Jun 1908, 1 (paralectotype), 21 Jun 1908, G.R. Pilate, B.311, willow (ANSP); 1 (paralectotype), e. 24 Jun 1908, G.R. Pilate, USNM slide 17966 (USNM). Mills College: 1 (paralectotype), e. 18 May 1908; 1 (paralectotype), e. 21 Jun 1908, G.R. Pilate, B.311, willow (USNM). San Luis Obispo Co., Dune Lakes, 3 mi [4.8 km] S. Oceano: 1, 1, 24 Aug 1973, e. 7–11 Sep 1973, J. Powell 73H23, ex Salix (DLW). San Mateo Co., near Pacifica: 2, 1 Sep 1980, e. 14 Sep 1980, D.L. Wagner, JAP 8012, ex Salix, slide DRD 3747 (DLW). Sonoma Co., Bodega Marine Lab: 1, 30 Jun 1982, e. 12 Jul 1982, D.L. Wagner, JAP 82F131, ex Salix (DLW). WASHINGTON: Skamania Co., Mt. St. Helens, Bear Meadow, 1800 m: 2, 2, mine: 21 Jul 1986, e. larva 23 Jul–6 Aug 1986, G. Deschka, mine in Salix sitchensis, zucht nr. 1929B (GD). Whatcom Co., Lyman, 30 m: 4, 2, mine: 14 Jul 1986, e. larva 17–26 Jul 1986, G. Deschka, mine in Salix lasiandra, zucht nr. 1917; slide GD 2150 (GD).

Phyllonorycter apicinigrella is a moth of the family Gracillariidae. It is found along the western coast of the United States from San Luis Obispo County, California, north to British Columbia, Canada.

The length of the forewings is 2.7-3.8 mm. Adults are on wing in May and from mid-June to mid-September. There are either two or three generations per year.

The larvae feed on Salix species, including Salix lasiandra and Salix sitchensis species. They mine the leaves of their host plant.

Phyllonorycter apicinigrella là một loài bướm đêm thuộc họ Gracillariidae. Nó được tìm thấy dọc theo miền tây bờ biển của Hoa Kỳ from San Luis Obispo County, California, phía bắc đến Whatcom County in extreme tây bắc Washington.

Chiều dài cánh trước là 2.7-3.8 mm. Con trưởng thành bay vào tháng 5 và from giữa tháng 6 đến giữa tháng 9. There are either two or three generations per year.

Ấu trùng ăn Salix species, bao gồm Salix lasiandra và Salix sitchensis species. Chúng cuộn lá làm tổ.