chamberlin: myriopoda of the Australian region. 147 



406. Platyrrhacus dadayi (Silvestri). 



Eufrachyrhackis dadayi Silvestri, Term, fiiz., 1899, 22, p. 208, pi. 10, fig. 15-17, 

 pi. 11, fig. 18-21.1 



Locality. — New Guinea: Astrolabe Bay, P>ima.^ 



407. Platyrrhacus beauforti Attems. 

 Bijdr. dierk., 1915, 20, p. 6, pi. 1, fig. 3-6.i 



Locality. — Ceram: Honitetu.^ 



408. Platyrrhacus mediotaeniatus Attems. 

 Bijdr. dierk., 1915, 20, p. 7, pi. 1, fig. 7.^ 

 Locality. — Ceram: Honitetu.^ 



409. Platyrrila-CUS puliger Attems. 

 Bijdr. dierk., 1915, 20, p. 7, pi. 1, fig. 8, 9.i 

 Locality. — Waigeu: Kaiawat, near Beo, Balian.^ 



AiPOTROPis, gen. nov. 



Composed of the head and twenty segments. Thirty-one pairs of 

 legs. Head completely, or xery nearly completely, covered by the 

 first tergite. Antennae long; strongly ckA-ate distad of end of third 

 article, the fifth and sixth articles much enlarged, the seventh again 

 narrower, subconical; the fifth article much the longest, in length 

 about equalling the sixth and seventh together. Collum with ante- 

 rior and lateral borders together forming an even semicircular line. 

 The free border or rim crenate as in Lophodesmus, radial sulci simi- 

 larly dix-iding it into ten lobes. Dorsum of tergites in general low, 

 only weakly convex; the keels high, but little below highest part of 

 dorsum and much above the middle level of the body. Keels broad, 

 nearly horizontal, lateral and caudal border di\-ided into lobes by 

 radial sulci, the margin crenate or lobate. Surface of tergites includ- 

 ing keels out as far as the border lobes covered with numerous minute 

 tubercles or coarse granules; in addition two submedian longitudinal 



