XVlll THE MICROSCOPE. 



PIG. PaGTE 



185. a. Small mouse-hair 79 



5. Larger mouse-hair. 



C. Plain mouse-hair. 



d. Minute hair from ear of mouse. 



186. Hair of long-eared bat SO 



187. Transverse section of hair of peccary 80 



IBS. Pith-like hair of musk-deer 80 



139. Hair from tiger caterpillar 80 



190. a. Branched hairs from leg of garden spider 



{Epeira diadema) 81 



b. Spine, with spiral flutings, from the same. 



c. Small brush-like hairs from an Australian 



spider. 



191 . Hair from flabellum of crab 81 



192. Portion of four of the barbs of a goose-quill 81 



193. Portion of the same more magnified 81 



194. Swan's-down 81 



195. Head and mouth of a flea 82 



196. Head and mouth of a bug 82 



197. Mandible of humble bee 84 



198. Head and mouth of louse 83 



199. Head and mouth of gnat 83 



200. Extremities of barbs of the sting of common bee. . 84 



201. Head of honey bee 83 



a. Piece of the tongue more magnified. 



202. Mouth of blow-fly 84 



203. Head and mouth of butterfly 84 



204. One of the fangs of a spider, showing the poison- 



bag and duct 85 



205. Foot of Empis, a species of fly 87 



206. Foot of bee 87 



207. Foot of spider 87 



