420 



Tiphrosia Boisd. (in part), (ion. Iii<l., l'J8, 1H40 



Dup. (in part), Cat., 22«, 1844. 

 Boarmia H.-Sch. (in part), ScLm. Eur., iii, 76, 1847. 

 Stepb., Cat. Br. Lep., 174, IS.^jO. 



Lederer (in part). Verb. But. Zool. Ges. Wien, 177, 1853. 

 Teph-oda Guen. (iu part), Pbal., i, 258, 18.57. 



Walk, (in part). List Lep. Het. Brit. Mus., xxi, o98, 18G0. 



Front of tlie head rather .square. Palpi very stout and thick, scarcely 

 passing beyond the front (7'. canadaria), or slender, with the third joint acute 

 and passing a little beyond the front {T. cognalaria). Male antennae well 

 pectinated, plumose. Fore wings with the costa straight, usually straighter 

 than ill any other genus of the subflimily. Apex rectangular, subacute ; outer 

 edire of the wing not bent. Hind wings rather square, with a slight bend in 

 the- middle of the outer edge, slightly dentate in T. canadaria, usually entire ; 

 apex slightly produced Venation : usually but five subcostal venules (six in 

 T. californiaria, plate 5, fig. 2 b), where there are usually six in Cij??iatophora ; 

 the first and second median veins arise farther apart than in Cymatophora. 

 No subcostal ceil. Hind legs long and slender, either with the male hind 

 tihise slender and the tarsi three-fourths as long as the tibise {T. cogna- 

 taria), or the hind tibia? are very long and swollen, and the tarsi are one- 

 third as long as the tibiae. 



In coloration, the species usually closely resemble those of Cymatophora, 

 and are distinguished from that genus by the more plumose male antennae, 

 the more angidar wings, the narrower front, longer hind legs, while some of 

 the species are pearl-colored (7'. cognatnria), and nearly all have two well- 

 marked rows of black spots along the abdomen. 



The genus Tephroda as limited by Duponchel and Guen^e is in part 

 composed of species of Cymatoj)hora [Boarmia). C. consonaria and crepuscu- 

 laiianre certainly not Tcphrosla, though Guent'e regards them as the typical 

 si)ecies of the genus. The genus is re|)resented in Europe by T. puiictu- 

 latii, a representative of our T. anticaria. The genus is very much better 

 represented in this country than in Europe. 



Larva. — The larvfB differ from those of Cymatophora in being smooth. 

 The larva of T. punctulata is said to be smooth, and of a reddish color, with 

 white spots or blotches on the back of all the segments. It feeds on the 

 birch. — (Newman.) 



