LIST OF ILLUSTRATIONS: 
Page. 
eat Gallsvof"Pontaniac) 2222. soscee aace as yee eee owe eee ee eee Frontispiece 
wLleadotehetenonus extensiconnissn cee mi eaeee mee eee ee eee eee eee eee eee abil 
; Mouth-parts of Pachynematus erichsonit=.--=2-- 22-222 o2] =] eee =e eee 12 
EMMOLAN Oh MACY NENLatwus CLIC SOI Uve = aan ae nee ee 13 
= why Pes Of (ClAWS 'saccc. cee vane ose cee Gaston eee eae eee eee eee 15 
o-eAbdomentot Pachynematis erichsonitae aaa eee ee ee ee 16 
; Wienationvot Nematines:: 252. <-<228 a.2S2 04sec eciseae sec eee eee 16 
Rontania pisum: Wialshise. i: dc 2 asec ee ots oe eae re eee ee Oe ee 3 
setenonus.ventralis (Saye: 2s-< < dace me =n. ance pene ne eee eee 51 
OMePachynematius entens.connie INOLLOM@ a= ee renee ee Senne ee sees eee 97 
MGAMNONY chus calufornicus mM. Spare ses) ne aes aaeeieae ieee 123 
