NORTH AMERICAN LEPIDOPTERA. 141 



A9IBESA Grote. 

 (Type Isetella Grote) 



N. A. Ento. i, 98, 1880 ; Pristophora Rag., Auuales Soc. Eato. Frauce, 1887, p. 

 229. 



Labial palpi erect, somewhat recurved, squamose ; maxillary palpi small ; 

 tongue strong; ocelli present; antennse pubescent, bent above base, without tuft, 

 but the members prolonged into teeth. Genitalia of % : uncus rounded, conical 

 with short spine at top; harpe narrow, but little more than a strong long arm 

 covered with long hairs; lower plate quadrate, conical at end, broad, suddenly 

 widening below ; the whole resting on a strong framework capable of extension ; 

 last segment of abdomen beneath with shield and two strong tufts of hairs. 

 Venation : fore wings 11 veins, 4 and 5 separate, 10 separate; hind wings 8 veins, 

 2 quite distant from angle, 3 separate, 4 and 5 stemmed. 



Synopsis of Species. 



1. ColorVeddish purple and whitish lietella. 



otherwise 2. 



2. Basal line broad black; color white iliveella. 



" narrow ; color not white 3. 



3. Fore wings triangular, outer line even. Walsiiigliainiella. 



" rounded, subparallel ; outer line dentate lallatalis. 



1. A. lietella Grote, N. A. Ento. i, 98, 1880.— Expands 20—28 mm. Bright 

 brown and whitish gray, brightly colored and distinctly marked ; a brown patch 

 siiading to blackish interiorly on costa, edged inwardly by the black anterior 

 line, and outwardly by the narrow discal spot, margined straightly in the cell 

 against a white shade, which comes from the basal field ; anterior line preceded 

 by brown shade and white line ; median space with a brown shade on inner 

 margin wide, the lines far apart; outer line blackish, followed by a white line 

 and succeeded by a diffuse brown shading, which forms a defined blackish brown 

 spot before the apices on costa. A fine black terminal line; fringes fuscous, with 

 a hair line at base. Hind wings translucent, with paler interlined fringes. Be- 

 neath fore wings fuscous; hind wings paler; discontinued exterior lines indi- 

 cated. Head and thorax gray. 



Colorado. A beautiful .species. 



2. A. Iliveella Hulst, Ento. Am. iv, 117, 13SS {Lipographis). —ExiiauAs 29 

 mm. Palpi, head and thorax pure snowy-white, with a slight sprinkling of 

 black scales ; abdomen yellowish white ; fore wings pure snowy-white, more or 

 less marked with black ; costa white; posteriorly the wing is finely marked with 

 black on veins, and on posterior half stained with fuscous; basal line narrow, 

 white, shaded inwardly along inner margin with large black spot; outwardly 

 with narrow line of black ; outer line white, toothed within between the veins, 

 edged with a line of black points outwardly along margin ; apex with two black 

 points on either side the outer line; hind wings dirty whitish, yellowish at apex 

 and along anterior margin. 



Colorado. 



