J^ew Soioth Wales. 



167 



II. 



The Genus Tylenchtjs. 



(Character given on page 164.) 

 Key when both Sbxes are knowk. 



Female sexual apparatus, dottble : — Page. 



Species leading a parasitic life in roots of various plants — 



(Esophagus of the larva 26 ; width 6 2 Schachtii 170 



(Esophagus of the larva 18; width 3-6 3 arenarius 170 



(Insufficiently known tome at this point are T. radioicola 

 and T. Javanicus. ) 

 Species leading a free existence-- 



Tail of female rounded at the end — 



Length of female 1-7 mm. ; width 2-5 4 robmtua 1/0 



Length of female '75 m»'. ; width 4' 5 dubius 171 



Tail of female conical — 



Cuticula with no very conspicuous wings ; spear 



stout 6 rjracilis 171 



Cuticula with two lateral and four submedian 



wings ; spear slender 7 lamelU/erus 171 



Female sexual apparatus, simple (single), often with a rudi- 

 mentary posterior branch : — 



(Esophagus Tylcnchoid, i.e., with one or more bulbs ; 



parasitic in bees 1 bombi 169 



QEsophagus Tylcnchoid ; if parasitic then in plants — 

 Bursa of male completely enveloping the tail — 

 Tail of female rounded at the end- 

 Vulva 75'+ ; tail conoid 8 prateusis 171 



Vulva 67' ; tail nearly cyliudroid 9 obtusus 172 



Tail of female conical — 



Length -rA mm 10 terricola 172 



Length 1" mm. or more — 



Spicula L-shaped 11 imper/cctus 172 



iSpicula straight or arcuate — 



Accessory pieces aa long as the spicula .. 12 fungorum 172 

 Accessory pieces shorter than the spicula — 



(Esopliagus (female) 4-2 13 scandens 173 



(Esophagus (female) 16-7 14 devastatrix 173 



Bursa of male incompletely enveloping the tail — 



Length of tlie cesophagus indefinite ; tail 95' 15 velalus 174 



Lengtli of the oesophagus definite — 

 Anus 67' to 70-— 



Vulva central ; width 2- 16 leptosoma 174 



Vulva GO- ; width So 17 Jili/onnis 174 



Anus 84' or more — 

 Neck 27- to 29— 



Vulva 83' ; spear 5-5 18 macrophalhis 174 



Vulva 70- ; spear 2- 19 pillulifer 174 



Neck 15 to 20— 



Spear stout ; conspicuously bulbed 20 Darainii 175 



Spear weak ; inconspicuously bulbed — 

 Width 29 ; bursa extending to 



middle of tail 21 intermedius 175 



Width 2'1 ; bursa shorter 22 elegans 175 



Neck 10- ; width 5- 23 A.'<kaiiaseyi 176 



(Esophagus Dorylaimoid, i.e. lachrymatoriform 24 tnirabilis 176 



NOTE.S ON THB KeY. 



1. The keys assume the unknown male of terricola to have a bursa completely 

 enveloping the tail. 



2. The figures throughout refer to percentage of the length of the worm unless otherwise 

 stated. 



