_Thanaos juvenalis._ | | 34. _Thanaos persius._ | | 35. _Hesperia montivaga._ From the original | | by Abbot in the British Museum. | | 36. _Pholisora catullus._ | | 37. _Thanaos martialis._ From the original | | by Abbot in the British Museum. | | 38. _Thanaos brizo._ From the original | | by Abbot in Dr. Boisduval's library. | | 39. _Hylephila phyloeus._ From the original | | by Abbot in Dr. Boisduval's library. | | 40. _Amblyscirtes vialis._ | | 41. _Pholisora catullus._ | | 42. _Thymelicus oetna._ From the original | | by Abbot in Dr. Boisduval's library. | | 43. _Atalopedes huron._ | | 44. _Limochores taumas._ | | 45. _Amblyscirtes samoset._ After the original | | by Abbot in the British Museum. | | 46. _Lerema accius._ After the original by | | Abbot in Boston Society of Natural History. | | 47. _Atalopedes huron._ | | 48. _Calpodes ethlius._ | | | | [Illustration PLATE VI.] | +--------------------------------------------------------------+ _The Place of Butterflies in the Animal Kingdom._--The animal kingdom, for purposes of classification, has been subdivided into various groups known as subkingdoms. One of these subkingdoms contains those animals which, being without vertebræ, or an internal skeleton, have an external skeleton, composed of a series of horny rings, attached to which are various organs. This subkingdom is known by naturalists under the name of the _Arthropoda._ The word _Arthropoda_ is derived from the Greek language and is compounded of two words, (_αρθρον_), meaning a _joint_ and (_πους_), meaning a _foot_. The _Arthropoda_ seem at first sight to be made up of jointed rings and feet; hence the name. The subkingdom of the _Arthropoda_ is again subdivided into six classes. These are the following: Class I. The _Crustacea_ (Shrimps, Crabs, Water-fleas, etc.). Class II. The _Podostomata_ (King-crabs, Trilobites [fossil], etc.). Class III. The _Malacopoda_ (_Peripatus_, a curious genus of worm-like creatures, found in the tropics, and allied to the Myriapods in some important respects). Class IV. The _Myriapoda_ (Centipedes, etc.). Class V. The _Arachnida_ (Spiders, Mites, etc.). Class VI. The _Insecta_ (Insects).