148 THE COMMONER BUTTEBFLIES. 



wliicli it does without concealiiient. The chrysalis hangs 

 from ten to fourteen days, when it hatches the same season, 

 but an increasing number of each brood do not disclose 

 their inmates at all until the next season ; whether this has 

 any definite relation to the dimorphism of the first brood 

 is not yet known. The odor from the scent-organs of the 

 caterpillar is particularly nauseating. 



45. Genus Jasoniades. 

 JASONIADES GLAUCUS— THE TIGEK SWALLOW-TAIL. 



(Papilio glaucus, Papilio turniis, Jasoniades tiiruus.) 



Butterfly. — Wings bright straw-yellow (paler beneath) with 

 a very broad black outer margin in which are yellow lunules and 

 on the fore wings four black bars descending from the costal 

 margin, the innermost of which, tapering throughout, nearly 

 crosses also the hind wings; besides there is an orange lunule next 

 the anal angle of the hind wings and much dusting with metallic 

 blue, particularly on the under surface on the inner portion of 

 the black border of the same. Abdomen with yellow sides. Ex- 

 panse 3f-4^ inches. 



Caterpillar. — Head ferruginous. Body naked, largest at the 

 division between thoracic and abdominal segments, deep green, 

 paler below, with a black transverse stripe above at front edge 

 of second abdominal segment, bordered in front by yellow; upper 

 sides of third thoracic segment with a small black-edged greenish 

 yellow spot having a black-edged turquoise pupil. Length 2 

 inches. 



Ch.rysalis. — Koughened and straight, the wing-cases not 

 prominent beneath, all the higher projections anterior and 

 directed more or less forward; griseous with a yellow olivaceous 

 tinge, often with greenish patches in front and specked and 

 lined with blackish. Length \\ inches. 



Pound everywhere in our district and far beyond it, 

 often swarming in abundance particularly in hilly regions 

 and especially in narrow wooded valleys, often also 

 assembling in vast numbers about damp spots or ordure or 

 decaying animal substances. It Vv^inters as a chrj^salis and 



