LIST OF ILLUSTRATIONS. XI IT 



Page. 

 Fig. 158. The saltmarsh moth, Isia Isabella, family Arctiidse: Moth and cater- 

 pillar 1 00 



159. An ant, Monnmorium pharaonis: a, Female; b, worker 101 



160. A wasp of the family Vespidaj, Polistes bdlicosus 101 



161. A Scolytid or engraver-beetle, Xyleborus perforans, male and female. 102 



162. Galleries of a Scolytid beetle, Pdyogenes cariniceps 103 



163. a, A caddicefly, Macronema zebratum; b, a mayfly, Ilexagenia 



bUineata; c, its larva 104 



164. The Schmitt folding insect box, opened and showing arrangement 



of insects 106 



165. The U. S. National Museum drawer, showing arrangement of speci- 



mens 107 



166. Construction of insect cabinet drawer of the U. S. National Museum: 



A, Cross-section of front; I>, same of side; C, view of front end of 

 side, two-thirds natural size, a, Bottom; b, cork lining; c, inside 

 strip forming naphthalene poison chamber; d, naphthalene poison 



chamber; /, top; g, groove 107 



167. Paper lining for insect box: A, A, Side and bottom of. box; B, 



frame; C, open space; P, P, paper 108 



168. A naphthalene cone Ill 



169. A lamp chimney cage 113 



170. An insect breeding-cage or vivarium 114 



171. The improved base for breeding-cage 114 



172. A breeding-cage for parasites 115 



173. A root cage for rearing insects which live underground: <t, Frame 



with slide removed; 6, movable slide; c, top view 116 



174. Cage for rearing bark-infesting insects, fastened to tree 117 



1 75. The Fielde ant nest: a, b, Glass base; c, c, partitions 117 



1 76. The Needham aquatic cage 119 



177. A mailing-tube: a, Tube; b, cover 121 



178. A spider, Peucetia viridans 122 



179. An orb-weaver, Argiope trifasciata: a, Male; b, female; c and </, 



enlarged parts 123 



180. A harvest-man, Liobunum ventricosum 123 



181. A true scorpion, Centrums carolinianus „ 123 



182. A false scorpion, Chelifer cancroides 124 



183. The six-spotted mite of the orange, Tetranyclius 6-maculatus: a, From 



above; b, tarsus; c, rostrum and palpus; d, tip of palpus: a, Greatly 



enlarged; b, c, more enlarged; d, still more enlarged 124 



184. A cheese mite, Tyroglyph us 124 



185. The cattle tick, Margaropus annulatus ] 25 



186. One of the gallmites, Eriophyes 1 25 



187. The house centipede, Scutigera forceps 126 



188. A millipede, Cambala annulata 126 



