91 



apical, oblique, black line is distinct and often dislocated. There are usually 

 two parallel dusky bands on the hind wings. 



The species arc distinguished from those of Pefrophora by the oblong 

 wings, unusually obtuse at the apex, the hind wings scarcely extending 

 beyond the tip of the abdomen, by the broad tuft at the end of the abdomen, 

 and the unusual style of coloration as well as the unusual venation. 



This genus as developed in North America contains both of the two 

 common European species and three others besides, so that this country may 

 be looked upon as the center of distribution for the northern hemisphere. 



Larva. — " Quite short, cylindrical, thick, a little moniliforni, with numer- 

 ous conspicuous lines ; head small and globular ; living exposed on trees 

 and shrubs.'' 



Pupa. — "Contained between leaves." — Guene'e. 



Synopsis of the Species. 



A. Fore wings with the bands edged with black, oblique, and wavy lines : 



Fore wings oblong; apex rectangular ; bands bordered with greenish H. trifasciata. 



Fore wings pointed; bands usually bordered \\ illi reddish H. californiata. 



B. No black lines ; wings crossed by several distinct, smoky, or white lines: 



Fore wings pointed ; a marginal smoky line, olive-greeu, or reddish H. sordidata. 



Fore wings with apex rectangular, brown, with tive distinct smoky bands; mar- 

 gin of wing not smoky H. 5-fasciata. 



Fore wings black, with tive conspicuous white bands H. speciosata. 



Hydriomena teifasciata Packard. Plate 8, fig. 29. 



" Geometra trifasciata Bork., Eur. Schui., v, 308, 1794." 



" Geometra impluviata Den. and Sckifl'., Verz., 109, n. Cat." 



" Hiibn., Scum. Eur., 223 (post 1797)." 

 Acidalia impluviata Troits., Schm. Eur., vi, ii, 21, 1828. 

 Tpsipetes impluviata Steph., Nomencl. Br. Ios., 44, 1829; "Cat. ii, 1829." 

 Larcntia impluviata Dup., Lop. France, viii (v), 424, pi. 200, fig. 3, 1830. 

 Kuthalia impluviata Stepb., 111., iii, 254, 1831. 

 Cidaria bnpluviaria Boisd., Gen. Ind., 214, 1840. 

 Larcntia impluviaria H.-Sch., Schm. Eur., iii, 1(58, 1847. 

 Hydriomena impluviata Stc-pli., Cat. Br. Lep., 195, 1850. 

 Tpsipetes impluviata Guen., Phal., ii, 377, 1857. 

 Tpsipetes pluviata Guen., Phal., ii, 378, 1857. 



1 psipetes impluviata Walk., List Lep. Het. Br. Mus., xxiv, 1267, 1862. 



Tpsipetes pluviata Walk., List Lep. Hot. Br. Mus., xxiv, 1268, 1862. 



(i c? and 4 9. — Palpi long and slender; fore wings rather short and 

 broad, and apex more rectangular than in any of the other species. Body 

 and wings light-gray. Fore wings light-gray, with a pale greenish tinge. 



