304 Transactions. 



Family LITHOBIIDAE. 

 Genus Lithobius Leach, 1815. 



Lithobius Leach, Trans. Linn. Soc, vol. 11, p. 381 (1815). Hutton, 

 Index Faunae Novae Zealandiae, p. 235 (1904). 



Head with numerous ocelli, labrum tridentate. Sternite of prehensorial 

 segment absent. Legs without a tibia] spur. 

 Type : L. jorficatus Leach. 



1. Lithobius argus Newport, 1845. 



Lithobius argus Newport, Trans. Linn. Soc, vol. 19, p. 369 (1845). 

 Hutton, Index Faunae Novae Zealandiae, p. 235 (1904). 



" Ferrugineus, capite parvo subconvexo, antennis pilosis, ocellis parvis 

 brunneis utrinque 28-30, labio angustato emarginato polito : denticulis 

 10 nigris. Long. unc. 9/10." — (Newport.) 



" Hab. in Nova Zelandia, prope Wellington, (v. in Mus. D. Hope.) " 



I have not seen any specimens of this species, or of any other species 



of the genus Newport's description is the only account of its occurrence. 



Family HENICOPIDAE. 



Key to the Genera. 



1. First to 13th legs with tarsi triarticulate, 14th and 15th pairs 



with tarsi 6-jointed . . . . . . . . Henicops Newport. 



2. First to 12th legs with tarsi uniarticulate, 13th to 15th legs 



with tarsi biarticulate. 



a. Presternum with dental edges rounded and narrow, 



teeth 1.2 + 2.1 .. .. .. .. Lamyctes Meinert. 



a 1 . Presternum with dental edges straight and broad, 



teeth 4 + 4 to 6 + 6 . . . . . . Wailamyctes nov. 



3. All the legs with tarsi biarticulate . . . . . . Paralamyctes Pocock- 



4. Coxal pores reduced to one on each side ; 15th pair of legs 



much shorter than 14th and without protarsal segment . . Haaseilla Pocock. 



Genus Henicops Newport, 1845. 



Henicops Newport, Trans. Linn. Soc, vol. 19, p. 372 (1845). Hutton, 

 Ann. Mag. Nat. Hist., 4th ser., vol. 20, p. 114 (1877) ; id., Trans. 

 N.Z. Inst., vol. 10, p. 288 (1878). Pocock, Ann. Mag. Nat. Hist., 

 7th ser., vol. 8, p. 453 (1901). Hutton, Index Faunae Novae 

 Zealandiae, p. 235 (1904). 



Head with one pair of eyes. Antennae with from 30 to 37 joints. 

 Tergites (fig. 1) in the anterior region with posterior angles rounded, and 

 slightly emarginate, becoming increasingly emarginate, and with the angles 

 less rounded posteriorly. Mandibles (figs. 2 and 2a) with complex teeth, a set 

 of pectinate processes above the teeth and a fringe of fine hairs below them. 

 Labrum (fig. 3) unidentate, inner edges of lateral pieces fringed with small 

 hairs. First pair of maxillae (figs. 4 and 4a) : inner rami separated to a 

 considerable extent, provided with plumose and simple hairs ; outer rami 

 with plumose hairs along the inner edge, and simple hairs elsewhere. Pro- 

 sternum narrowed anteriorly, teeth distinct. Stigmata on the 1st, 3rd, 



