COLLEMBOLA OF THE FAMILY ISOTOMIDAE 133 



Plate 15 

 Archisotoma besselsi: 



150. Left mucro, X 892. 



151. Right mucro, X 735. 



152. Dorsal aspect of left mucro, X 855. 



153. Dorsal aspect of right mucro, X 855. 



154. Left aspect of tenaculum, X 892. 



155. Dorsal setae of first abdominal segment, X 540. 

 Agrenia bidenticulata: 



156. Eyes and postantennal organ of right side, X 195. 



157. Sense organ of third antennal segment of left side, X 1,428, 



158. Right fore foot, X 750. 



159. Right mucro, X 750. 



Plate 16 

 Proisotoma {Proisotoma) rainieri: 



160. Eyes and postantennal organ of left side, X 340. 



161. Sense organ of third antennal segment of left side, X 1,100. 



162. Left fore foot, X 847. 



163. Right hind unguiculus, X 1,060. 



164. Left mucro and end of dens, X 1,060. 



165. Left mucro, X 1,060. 



166. Left mucro, X 1,060. 



167. Right mucro, X 1,060. 



168. Left aspect of tenaculum, X 667. 

 Proisotoma (Proisotoma) schdfferi: 



169. Eyes and postantennal organ of right side, X 187. 



170. Sense organ of third antennal segment of right side, X 1,067. 



Plate 17 

 Proisotoma (Proisotoma) schdfferi: 



171. Right hind foot, X 453. 



172. Left hind unguiculus, X 788. 



173. Left aspect of left mucro. Lamellae: ad, Anterodorsal; o, outer; 



-pd, posterodorsal ; i', ventral. X 738. 



174. Dorsal aspect of left mucro. Lamellae: i, Inner; others as in figure 



173. The anterodorsal lamella was bent by the pressure of the 

 cover glass. X 738. 



175. Left aspect of tenaculum, X 434. 



176. Dorsal setae of second abdominal segment, X 366. 

 Proisotoma (Proisotoma) communa: 



177. Eyes and postantennal organ of right side, X 366. 



178. Sense organ of third antennal segment of right side, X 993. 



179. Left hind foot, X 626. 



180. Left mucro and end of dens, X 987. 



Plate 18 

 Proisotoma (Proisotoma) titusi: 



181. Eyes and postantennal organ of left side, X 513. 



182. Sense organ of third antennal segment of left side, X 1,100. 



183. Left hind foot, X 980. 



184. Dorsal tubercles of fifth abdominal segment of a young specimen, X 513; 



185. Left dens and mucro, X 347. 



186. Left mucro, X 1,161. 



187. Right mucro, X 1,161. 



188. Dorsal aspect of left mucro, X 1,212. 



189. Dorsal setae of second abdominal segment, X 337. 



