324 The Life History of " Wweworms" 



8. 9tli al)dominaI segment with transverse rows of large setiferous tiibercles, with- 

 out sensory pits ........... 9 



9th abdominal segment without transverse rows of setiferous tubercles, with 



two sensory pits .......... Agriofes 



!>. nth abdominal segment with 3 rows of setiferous tubercles . . . Dolopiu^ 

 9th abdominal segment with only 2 rows of setiferous tubercles Adraslus limbatus 



10. Anal tube situated under the posterior third of 9th abdominal segment Megapentkes 

 Anal tube situated under the anterior third of 9th abdominal segment . . 11 



11. 9th abdominal segment narrowed conieally from the base, with transverse rows 



of large setiferous tubercles ........ Ischnodes 



9th abdominal segment cylindrical at the base, without tubercles . . Elater 



\2. The two terminal processes simply bending inwards .... Limonius 



The two terminal processes each ending in 2 prongs . . . . . 13 



13. Inner prong of terminal process forming principal branch . . Hypnoidus 

 Outer prong forming principal branch or equal to the inner prong ... 14 



14. 9th abdominal segment with a more or less deep median furrow ... 15 

 9th abdominal segment without median furrow .... Corymhiles 



15. Nasale ending in a single tooth ...... (Jory)iibites aeneus 



Nasale ending in 3 teeth ........... 16 



1 6. Space between the two terminal processes small with narrow aperture posteriorly 17 

 Space between the two terminal processes large with wide aperture Athous (pars) 



17. Terminal process with inner prong quite smooth and simple . . . Campylus 

 Terminal process with inner prong very rough or projecting forward within the 



space ........... Athous (pars) 



REFERENCES. 



(1) Adrianov, a. p. (1914). Rept. on work of Entom. Bureau (of Kaluga), 1913- 



1914. 



(2) Beling, Th. (1883). Deutsche ent. Zeils. xxvir. 270, 293. 

 (3) (1884). Deutsche ent. Zeits. xxvnr. 207, 208. 



(4) DU BuYSSON, H. (1906). Faune Gallo-Rhenane-Coleopleres, v. Caen. 



(5) Curtis, J. (1860). Farm insects. London. 



(6) Hyslop, J. A. (1915). U.S. Depl. Agric. Bull. No. 156. 



(7) KoLLAR, Vincent (1840). A Treatise on Insects injurious, etc. (Eng. transl.). 



London. 



(8) Roberts, A. W. R. (1919). Ann. App. Biol. vi. 116-135. • 



(9) (1921). An7i. App. Biol. viii. 193-215. 



(10) Thomson, C. G. (1864). Skandinaviens Coleoptera, vi. 92. Lund. 



(11) Xambeu, — (1912). Ann. Sac. Linn, de Lyon, lix. 



(12) (1913). Ann. 8oc. Linn, de Lyon, LX. 



EXPLANATION OF PLATES XIII AND XIV. 



Fig. 1. 



Larva of Agriotes sputator, L. o. Terminal segments, b. Cuticle of 9th abdominal 

 segment between the sensory pits. Highly magnified, c. Cuticle of 8th abdominal segment 

 along medio-dorsal suture. Highly magnified, d. Normal spiracle, e. Abnormal spiracle. 

 X. Granulations of anterior margin of tergite. 



Fig. 2. 

 Athous haemorrhoidalis, F. Dorsal surface of 9th abdominal segment of larva. 



Fig. 3. 

 Corymbites cupreus, F. Same, 



