Dec, 1903] Packard: Genera of Bombvcine Moths. 245 



Hyperdirphia, gen. nov. 



Imago. — Male. Head narrower in front than \x\ Dirphia {D. /largen). An- 

 tennae of tnale the same as in Dirphia {D. /uvgr>ri), pointed at the end and pecti- 

 nated to the tip ; the distal pectinations being a little shorter, so that the tip is more 

 prolonged, filiform, than in Dirphia. Eyes large, decidedly more prominent and 

 globose than in Dirphia. Palpi very much larger and wider than in Dirphia and 

 extending well beyond the front ; third joint distinct. 



Thorax normal, not shaggy, but with a soft, rather short fur-like coat, with no 

 long thickened hairs, such as are characteristic of Dirphia [D. hageri). 



Fore wings very short and broad, costa regularly arched, apex siiuarish, outer 

 edge much as in D. ha-geri, though less oblique. Hind wings large and wide, outer 

 edge full and rounded, extending a little beyond the abdomen. 



Venation : The discal cell is broader and the two discal veins taken together are 

 more oblique than in Dirphia; also vein II I arises nearer the origin of the anterior 

 discal vein, /. e., much nearer the outer end of the discal cell. In the hind wings 

 the outer side of the discal cell is more oblique, and the posterior discal vein longer 

 than in Dirphia. 



Abdomen banded as in Dirphia hoegeri. 



Markings : The ground color of the fore wings a frosty, tawny hue, with a 

 peculiar, very large brown discal spot one half as wide as the wing itself, and broken 

 up by the discal veins and vein IV, which are snow-white. No basal or extradiscal 

 lines in male, but they are present in female. Hind wings ochreous tawny, with a 

 slight dusky discal streak ; no discal spots beneath. 



The type of this genus is Cramer's Attacus tarqiiinia (Papillons 

 Exotiques, I, p. 6, PI. IV, A, 9 , B, C, $ , from Surinam ; my ex- 

 ample coming from French Cayenne). 



This genus, represented by a single species, is interesting as being 

 a connecting link between the Dirphia group and the Automeris 

 group of genera. At first sight it would be mistaken for an Automeris 

 or ally of that genus, but on closer examination it will be found to be 

 more nearly allied structurally to Dirphia, especially the hcegeri sec- 

 tion. It is a mistake, however, to refer it to Dirphia, since it de- 

 cidedly differs besides the extraordinary style of coloration, in the 

 much larger and longer palpi, the narrower front of the head, and the 

 more elongated tip of the male antennae. It is an intermediate form 

 very decidedly linking Dirphia with Protautomeris and the Automeris 

 group of generic forms. 

 Protautomeris, gen. nov. 



Imago. — Male. Head moderately broad, narrowing somewhat towards the labial 

 region. Antennae of male much as in Dirphia {D. hageri), not very long but dif- 

 fering from Dirphia in the extreme tip being subfilifrom ; the distal pectinations 

 about three quarters as long as the basal ones ; the joints in the middle of the an- 

 tenna: rather short. 



