CHAMBKBUN: mykiopoda OF TBI AUSTRALIAN REGION*. 77 



\\ kLBSOBiuSj gen. qov. 



Related to Australobius hut < 1 ifTt^rinjz; in the more numerous articles of 

 antennae ^typically twenty-six to twnit y-ei^lit ), in having the prosternal 

 teeth only 2 |- 2, and in having the fourth joint of the anal legs in the male 

 with a special QOdular process at its distal end. Posterior angles of ninth, 

 eleventh, and thirteenth dorsal plates produeed. Coxal pores in a single 

 series on last four pain of legs. Posterior coxae not armed laterally. Ventral 

 Bpinei of anal legl 0, 1, 3, 3 (2), 1. Claw of female gonopods partite; basal 

 spines 2 -f- 2. 



Genotype. — If. .sydnrtfrnnin (Pocock). 



184. WaLESOBIUS sydneyensis (Pocock). 

 Li(fu>hius sifdneyensis Pocock, Ann. mag. nat. hist., 1891, ser. 6, 8, p. 153. l 

 Locality. — New South Wales: Sydney. 1 



185. Lithobius argus Newport. 

 Trans. Linn. soc. London, 1844, 19, p. 369. l 



Locality. — New Zealand: near Wellington. 1 



Newport regarded this species as very close to L. Jorficatus (Linne). 

 From the other known lithobiid species of the Australian region it 

 differs in the greater number of ocelli (twenty-eight or thirty on each 

 side). The prosternal teeth are 5 + 5. Posterior angles of ninth, 

 eleventh, and thirteenth dorsal plates produced (fide Pocock). 



Kauabius, gen. nov. 



This genus seems nearest the North American Tidabius. Antennae simi- 

 larly composed of above twenty-five articles. Ocelli more numerous, seven- 

 teen to twenty-one in five series as against nine to fourteen in mostly three 

 series. Prosternal teeth similarly 2 + 2. Angles of none of dorsal plates 

 produced. In all known species of Tidabius the coxae are wholly unarmed 

 and the spines of the anal legs above are fixed at 0, 0, 2, 0, 0, while the ventral 

 are 0, 1, 3, 1, or less often 0, 1, 3, 2, 0; in the type of the present genus the 

 anal coxae are dorsally armed, while the dorsal spines of the anal legs are 1, 0, 

 3, 0, 0, and the ventral 0, 1, 3, 3, 1. The genotype is notably larger than the 

 known species of Tidabius, being 16 to 20 mm. in length, while the known 

 species of Tidabius never exceed 10 mm. 



Genotype. — K. hawaiiensis (Silvestri). 



