178 ox THE DIFFKRENCES BETWEEN PIEUIS BRASSIC.E AND P. CIIARICLEA, 



a precipitate retreat. When they settled on the rock they began a very 

 harmonious piping, to which I could willingly have listened had the rest of 

 the band desisted from their persecution. I defy any person to stand quiet 

 for five minutes on the top of one of these tors. If you have visited Dart- 

 moor I am sure you must have noticed them." 



From Ray, page 273. — "3Iusca Apiformis montanciy corpore hreviore, tJiorace 

 nigro, ahdomine anmilis nigris et rubria alternis vario. Ape vulgari mellifica 

 paulo brevior est, thorace nigro, abdomine annulis nigris et rubris alternis 

 composito. Alse cinereae transversa linea nigra prope imam partem notatae. 

 In monte pra3alto Hindzdhaugh dicto prope Sdtle Comitatus Eboracensis 

 oppiduluni, inveni. Viildc importuna erat et molesta circa montis cacunien. 

 Aculeum non habet, verum forcipes ad caudam iis quae in erucarum ore 

 similes." 



From Moufet, page 61, with a figure as "Asilus cipiarivs. Alter Tabanus 

 sive Asilus, nascitur in extremis partibus favorum, amplioris magnituJinls quam 

 sunt apes caeterae; et quoniam exagitat, nee patitur examina, conquiescere, (ut 

 lie praDdictus Oestrus armenta) oistron Groeci vocarent. Caput huic muscse 

 spadicei coloris est, linea alba a, fronte usque ad occiput intercurrente, scapulis, 

 et dorso subfuscisj reliquis omnibus a vulgariura muscaruni forma non differt, 

 baud florum duntaxat succo, et melle vescitur, sed etiam animalium sanguine, 

 quemdiu violentius exugit, acriter mordet." 



(j^ Tabani feed on flowers. ^ Can any of your correspondents suggest 



2 Do. feed on blood. J ivhat insect this is? 



The first part of Ray s;?ems to agree with a Tabanus, but the latter part 

 with the Asilus of the moderns, and yet the account agrees better with the 

 former, and still less with CEstrus or Sericomyia. 



Glanvillcs Wuotton, May -ith., 18o2. 



OX THE DIFFERENCES BETWEEN 



PIERIS, (PONTIA,) BRASSW^J AND P. CTIARICLIJA—Tn^ 



LARGE CABBAGE WHITE BUTTERFLIES. 



BY BOMBVX ATI, AS. 



In common, I believe, with several other entomologists, I have for many 

 years had my doubts as to whether Pieris Chariclea was a variety of Piens 

 Brassicoij or whether it was a distinct species. The great similarity in the 

 perfect insect and the non-recordance of any distinction in the caterpillars led 

 to the conclusion that Piiris Charidea was an accidental variety of Piens 

 Brassicce. The difference in size and appearance of the two insects, and the 

 constancy of these diflerences led to a quite opposite opinion. The only real 

 way of coming to a decision, which admitted of no doubt, was to obtain the 

 caterpillar and carefully watch its growth and development, and compare it with 

 that of Pieris Brassicce— move easily said than done, I grant you — for I have 



