DIURNAL LEPIDOPTERA. 19 



on the wing it sails with a steady motion like the swallow- 

 tailed hawk, and does not rotate to and fro like the ajax. 

 The larvae of the two live on the same shrub, but they differ 

 both in shape and color. 



This species also appears in successive broods during 

 spring, summer and autumn. I have met with it near 

 Cleveland as early as the last of April. Its beauty and its 

 graceful flight rarely fails to attract attention, but its saga- 

 city enables it often to evade attempts at its capture. 



Mr. Doubleday names Wheeling as the Northern limits 

 of its sojournings. 



No. 3. — P. AsTEEiAS. — The Fennel worm is well known 

 to every observer, but that it is the larva of our common 

 blue and yellow spotted butterfly is not, perhaps, as univer- 

 sally known. In this state it frequently does great injury 

 to the crops of carrots, parsnips, fennel and dill, by con- 

 suming their foliage, while in other seasons, from causes 

 not fully comprehended, hardly an individual will be seen. 

 Its numbers are much diminished by the attacks of small 

 ichneumon insects, who deposit their eggs in the pupa. 



The strong markings and bright colorings of the male in 

 the perfect state, contrast so strikingly with the duller and 

 paler hues of the female, that the inexperienced entomol- 

 ogist often considers them as distinct species. 



The larva will eat, with impunity, the leaves of the 

 Conium Maculatum and the still more poisonous Cicuta 

 Virosa of the meadows. 



No. 4. — P. TuRNUs. — This fine and showy species is known 

 among us as the large yellow butterfly. It is not very 

 abundant. Moist and muddy flats and the margins of wet 

 cow-yards seem to be favorite localities to which it resorts 

 in clear and hot weather. 



No. 5. — P. Philenor. — The figure of the perfect insect of 

 this species, contained in Say's American Entomology, is 

 erroneously colored, and that in Boisduval and Le Conte is 



