chamberlin: myriopoda of the Australian region. 65 



152. Dasyptyx uncifer (Silvestri). 



Lamnonyx crudfer Silvestri, Records Indian inus., 1919, 16, pt. 1, no. 5, p. 

 12, fig. XVII, 1-9.1 



Locality'. — New Guinea: Moroka.^ 



Ectoptyx, gen. nov. 



First lamella of mandible with teeth numerous, eighteen or more; mesal 

 margin below this lamella smooth or at most with but few and weak serrations. 

 Median lamellae of mandible dentate to base, with the distal teeth long but 

 the median and proximal ones very short. The labrum characterized by- 

 having the lateral pieces notably strongly extended caudad at mesal ends, the 

 mesal angles acute and extending much caudad of lateral region of labrum; 

 along the outer portion of each lateral piece a dense Une of cilia extends beyond 

 free caudal margin, giving the appearance of fringed margin. Otherwise as 

 in Mecistocephalus, etc. 



Genotype. — E. lobascuius, sp. nov. 



The first lamella of the mandible suggests that of the Indian Paurop- 

 tyx Chamberlin though the number of teeth is always greater and the 

 extensive serration of the mesal margin below it is missing or but 

 weakly suggested. Readily distinguished from the other known gen- 

 era by the characteristic form of the labrum and the presence of the 

 ciliary bands along ectal portions. 



153. Ectoptyx labasanus, sp. nov. 



Type.— M. C. Z. 2,140. Fijis: Nagasu (W. M. Mann). Para- 

 types.— M. C. Z. 1,952, 1,953, and 2,141. Fijis: Labasa, Suene 

 (W. M. Mann). 



Body brownish, densely marked above with a network of black, the same 

 also less strongly evident on pleurae and sternites, the network on dorsum 

 sometimes forming a denser, broad median longitudinal band. Head and 

 prehensors chestnut. 



Head with anterior margin subtruncate or very slightly and very obtusely 

 produced forward, notched at middle. The anterior corners oblique. Sides 

 converging moderately from frontal suture caudad to the more strongly 

 narrowed posterior region. Caudal margin nearly straight, very shghtly 

 convex. Head about 1 .6 times longer than Avide. Areplated region of clypeus 

 longer than the paired, non-areolated, posterior areas. A very small median 

 chitinous spot present. 



