COLLEMBOLA OF THE FAMILY ISOTOMIDAE 137 



Isoioma (Vertagopus) cinerea: 



300. Eyes and postantennal organ of left side, X 597. 



301. Sense organ of third antennal segment of left side, X 1,120. 



302. Left hind foot, X 1,120. 



303. Left mucro, X 1,120. 



304. Left mucro, X 1,120. 



305. Left mucro, X 1,120. 



306. Dorsal aspect of right mucro, X 1,120. 



307. Left mucro, X 1,120. 



308. Left aspect of tenaculum, X 467. 



Plate 28 

 Isoioma {Vertagopus) arbor ea: 



309. Eyes and postantennal organ of left side, X 333. 



310. Sense organ of third antennal segment of left side, X 1,120. 



311. Right hind foot, X 1,120, 



312. Left mucro, X 720. 



313. Left mucro, X 1,100. 



314. Right mucro, X 1,120. 



315. Left mucro, X 1,100. 

 Isotoma {Vertagopus) arborea nigra: 



316. Right mucro, X 960. 



317. Eyes and postantennal organ of right side, X 340. 



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



319. Dorsal aspect of left mucro, X 960. 

 Isotoma {Isotoma) difficilis: 



320. Eyes and postantennal organ of right side, X 610. 



321. Left hind foot, X 673. 



322. Right mucro, X 1,067. 



323. Right mucro, X 1,067. 



Plate 29 

 Isotoma (Isotoma) marissa: 



324. Eyes and postantennal organ of right side, X 450. 



325. Sense organ of third antennal segment of left side, X 1,200. 



326. Right hind foot, X 952. 



327. Right mucro, 2,525. 



328. Right mucro, X 1,200. 



329. Left mucro, X 1,190. 



330. Dorsal aspect of right mucro, X 1,190. 

 Isotoma {Isotoma) trispinata: 



331. Eyes and postantennal organ of left side, X 757. 



332. Left hind foot, X 952. 



333. Right mucro, X 975. 



334. Right mucro, X 1,249. 



335. Left mucro, X 1,185. 



336. Left mucro, X 1,080. 

 Isotoma (Isotoma) eunotabilis: 



337. Eyes and postantennal organ of left side, X 757. 

 Isoioma notabilis SchafTer: 



338. Eyes and postantennal organ of left side, X 735. Specimen from 



Finland. 

 Isotoma (Isotoma) eunotabilis: 



339. Left hind foot, X 1,158. 



