what correspond to the lunge of the higher animals, are not located in the thorax 

 or chest, but in the abdomen. The last segment of the abdomen carries at its ex- 

 tremity the external organs of generation. The male may be distinguished from 

 the female by the so-called prehensores, or "claspers," two flattish, scale-like appen- 

 dages which adhere one on either side to the last segment of the body. These 

 organs are quite peculiar in their structure, and in recent years have received a great 

 deal of study, as it has been found possible by means of them to distinguish closely 

 allied species, especially among the Hesperiidce. It is, however, not possible within 

 our allotted space to go into a minute discussion of this matter. The abdomen of 

 the female is devoid of these appendages, and in this sex is generally heavier and 

 plumper, especially when the eggs, which fill the ovaries, have not as yet been de- 

 posited. 



Thus far we have devoted our attention almost exclusively to the consideration 

 of the external organs of the suborder of insects which is under discussion. It may 

 be of interest to devote a few paragraphs to the internal anatomy of butterflies. 

 To do the subject full justice would require a volume; nevertheless some general 

 statements may pave the way for a more studious inquiry on the part of readers. 



Butterflies take their nourishment in fluid form, principally from the cups 

 which Flora provides. The organ of ingestion is the proboscis, which communi- 

 cates with a bulb-like receptacle in the head, known as the pharyngeal sac, con- 



