CONCLUDING REMARKS. 227 



•or Eelworms diflfer from true insects, and how 

 (similarly to insects) by a knowledge of their habits 

 und life-history, we may apply serviceable remedial 

 measures. 



In each case, however, I have given the scientific 

 name of the order or division to which these iioii- 

 insect pests belong, and their sequence in classifica- 

 tion of the animal kingdom may be fairly given as 

 follows. I say fairly, for schemes of classification 

 differ, and also only a few orders are here eafcered on, 

 so that while some of those mentioned follow each 

 •other in sequence, there are in other cases many 

 intervening between. 



At the head of the animal kingdom stand the verte- 

 brata, the back-boned animals with which here we 

 have nothing to do. Lower in the scale, and highest 

 of those in the preceding short notices, are : — 



1. Molluscs, represented here by Snails and Slugs, 

 pp. 198, 204—207. 



2. Insecta. — Insects, the various orders of which 

 class as Flies, Beetles, &c., are the main subject of 

 this little book, pp. 1 — 197. 



3. Myriapoda, including " Julus-worms," or Mille- 

 pedes, pp. 221—223. 



4. Arachnida, the class which includes Spiders, 

 Mites, Scorpions, &c. ; represented here by some of 

 the Acarina, or " Mites," pp. 223—226. 



Then, missing all mention of various important 

 divisions, notably that of the Crustacea which are 

 little represented in agricultural attack, we come to 

 the lower order of : — 



5. Nematodes, or Thread-worm, including various 

 kinds oi Angidllididce, or Eelworms, pp. 212 — 221. 



6. Trematodes, parasitic pests, amongst which is 

 included the Fasciola Jiepatica^ Distoiniiin hepaticani, 

 the Liver Fluke of the sheep, pp. 207 — 212. 



And now, once again, with regard to the subject of 

 this little book, I wish to point out that power of pre- 

 vention of insect attack does not lie in the mere 



