G18 THE BUTTERFLIES OF NEW ENGLAND. 



viduals of a single brood ? Is any lethargic tendency seen in the caterpil- 

 lars of the first brood, and to how great an extent is it found in those of 

 tlie second ? Is the comparative abundance of the different broods in any 

 one place affected by lethargy of caterpillars, or abstinence in oviposition 

 of butterflies? and if so, how and to what extent? It would be very 

 interesting to compare the annual history of this butterfly in the northern 

 and southern parts of its range. Is it anywhere double brooded, and if 

 so, which brood is then the more abundant in individuals? Parasites of 

 this butterfly are unknown, and the habits of the caterpillar have not been 

 observed in free nature. Does it occur in New Brunswick and Nova 

 Scotia? or in Wyoming and on the northern branch of the Saskatchewan, 

 as we might be led to suppose from the known facts of its distribution ? 



LIST OF ILLUSTBATI0N8.-BRENTHIS BELLONA. 



General. Chrysalis. 



Pi. 22, fig. 2. Distribution in North America. PI. 84, figs. 10, 11. Side views, 



Egrj. Imago. 



PI. 64, fig. 27. Plain. PI. 5, fig. 13. Male, both surfaces. 

 67 : 17. Micropyle. 15. Female, both surfaces. 



Caterpillar. 12:6. Both surfaces. 



PI. 75, tig. 1. Mature caterpillar. 33 : 38, 89. Male abdominal appendages. 



5. Caterpillar nearly grown, dor- 54:1- Side view of head and appendages 



sal view. enlarged, with details of the structure of 



79:10,11. Front views of head, stages iii, v. the legs. 



TRIBE MELITAEIDI. 



CRESCENT-SPOTS OR GREGARIOUS FRITILLARIES. 



Melltaeidae Newman. Papiliones variegati Wiener Verzelchniss. 



Hamadryades Borkhausen. 



. . • O thou, to whom 

 Broad leaved fig trees even now foredoom 

 Their ripen'd fruitage; yellow girted bees 

 Their golden honeycombs ; . . . 



. . . pent up butterflies 

 Their freckled wings; yea, the fresh budding year 

 All its completions — be quickly near. 



Keats. — Endymion. 



Imago. Head : club of antennae moderately long, well marked, three or four times 

 as long as broad, with a single or no carina beneath. Palpus very long and slender, 

 scarcely thickened by liairs or scales ; terminal joint pretty long, — from one-half to 

 one-tliird the length of the middle joint. 



Thorax : first superior subcostal nervure of fore wings arising before the tip of the 

 cell ; the second at or a little beyond the tip ; cell closed ; median nervure connected 

 beyond its second divarication with the vein closing the cell. Precostal nervure of 

 hind wings originating beyond the divarication of the costal and subcostal uervures ; 

 cell open or partially closed. Tarsi destitute of spines above, and the tibiae nearly 

 so ; four rows of spines on the under side of the terminal tarsal joint ; fore tarsi of 

 female composed of five joints, with a few spines besides the spurs, the last joint 

 unarmed. 



