EUPLOEINAE: THE GENUS ANOSIA. 705 



Wallace, who has had the o[)[)ortiinity of seeing them in their metropolis 

 both in the Old A\^orld and the New says : "they frequent the most open 

 situations, fly low and settle on herbaceous plants," which is certainly true 

 of the New England species. The species are generally exceptionally 

 numerous in individuals. Some are known to migrate. 



The eggs are slender obconic, vertically ribbed and transversely striate, 

 and are generally laid on the food plant singly, hatching in a few days. 

 Gagliardi is probably wrong in saying that the European chrysippus 

 lays in the ground at the foot of Asclepias (nella terra, e spesso a' piedi 

 deir asclepiade) . 



The caterpillars are stout, fleshy and cylindrical, tapering anteriorly ; 

 in the Old World type always, in the New World sometimes, two or more 

 segments of the body are furnished above with a pair of long, slender, 

 flexible, tapering filaments, forming a characteristic feature. According 

 to Wood-Mason the anterior pair "are articulated and freely movable at 

 the base and function as antennae" (Niceville, Butt. Ind., i:22) ; but 

 there is certainly nothing which can be called articulation in our American 

 species, though they are freely movable, and often palpitate in walking. 

 The larvae are rapid eaters and feed, the Old World type, or Limnaidi (to 

 which our New England species belongs) on Asclepiadaceae, the New World 

 type, or Ithomyidi on Solanaceae. The transformations of several species 

 are known but their history is still somewhat imperfect. They are on the 

 wing throughout the year in the warmer parts of America, and pass 

 through several successive broods, wintering farther north in the imago 

 state. 



The chrysalids are always suspended by the hinder extremity ; they 

 vary considerably in shape, but are generally plump and without sharply 

 angular projections ; they are usually green or yellow and marked with 

 golden spots or streaks, and are rather irregular in the length of time 

 during which they hang, varying from seven to twenty days according to 

 the weather. 



The position of this subfamily has been discussed on pages 113-114. 

 A single genus and species occurs in our northern fauna. 



ANOSIA HUBNER. 



Auosia Htibii., Yerz. bek. schmett., 16 (1816). Danais God., Eucycl. in6th., ix : 172 (1819). 



Danaidu Latr., Sonu. Bufl"., xiv : 108 (1805). (Not Dauaus Pauzer 1801). 



Danaus Latr., Gen. crust, ins., iv : 201 (1809). Type.— Pap. plexippus Linn. 



A butterfly, with golden wings Inroad parted 

 Nestling a" rose, convuls'd as though it smarted 

 With over pleasure. 



Keats.— <S7e<7> nnd Poetry. 



Imago (52:2; 62:1). Head (87:25) lari;e, covered thickly with ratlier short 

 hairs, longer around the base of the antennae. Front moderatelj' full, thrust abruptly 



