^^ 



185. 



HEPIALUS SYLVINUS. 



The Tawny and Brown Swift. 



} 



Order Lepidoptera. Fam. Bombycidae hat.^ Leach. 

 Type of the Genus Noctua Humuli Linn. 

 Hepialus Fab., Lat., Haw., Leach. — Hepiolus Och. — Bombyx Huh. 

 — Phalaena (noctua) Linn. 



AntenncE inserted between the eyes, in front of the head, seta- 

 ceous, very short, composed of about 20 joints of which the basal 

 one is the most robust (fig. 2) ; the males of some having a 

 single row of pectinations, the branches ciliated (1), 

 Labrum 

 Mandibles and 

 Maxillce 



Palpi wanting, a tuft of hair only arising where the labial palpi 

 are usually attached (4). 

 Males smaller than the females. Head small. Eyes small, but co- 

 vering the side of the head (/*). Thorax woolly. Abdomen rather 

 long, slightly attenuated and tufted in the males ; more robust in 

 the females. Wings very much deflexed when at rest, rather long 

 and elliptic. Legs, anterior pair the largest, posterior the smallest. 

 Tibiae, anterior having no spine on the internal side; hinder not 

 spurred but producing very long hair (8 + ), and dilated in some 

 males (H,b). Tarsi 5-jointed, sometimes ivanting in the posterior 

 pair of the males (H). Claws long bent. FaWiWi distinct (8f , hind 

 leg ofH. Humuli. — H the same q/"H. Hectus: a, the thigh; b, the 

 tibia ; tarsus none) . 

 harvie fleshy , naked, with 6 pectoral, 8 abdominal and 2 anal feet. 

 Pupae with the segments denticulated on the sides. 



Sylvinus Linn. Faun. Suec. 2. 306. 1151. — Crux Fab., mas. — Angu- 

 lum Haw., mas. — Hamma III. — Lupulinus Hiib., Haw.,fem. 

 Male fulvous, antennae pectinated, thorax and legs inclining to 

 castaneous ; superior wings variegated with chesnut, an oblique 

 sinuated white line near the base united at right angles to an- 

 other at the interior margin, which latter terminates near the 

 apex ; a triangular fuscous spot near the disk ; the costa varie- 

 gated with fuscous and an indented line of the same colour at 

 the base of the cilia : inferior wings and abdomen fuscous, the 

 apex of the latter and the cilia pale castaneous. 

 Female brown, antennae serrated, ochraceous ; superior wings 

 variegated with pale brown and clouded next the costa ; a large 

 space next the base dirty white ; an oblique irregular moniliform 

 row of spots somewhat parallel to the posterior margin sur- 

 rounded with dirty white, and another fuscous row between it 

 and the cilia ; a large oblong fuscous spot in the disk margined 

 with dirty white. 



In the Author's and other Cabinets. 



