Clulopods of the Genus Mecistocephalus. 331 



(PI. X. fig. 9). Anterior areolated band of clypeal region 

 longer than the paired posterior areas. Sublateral teeth 

 lar^e, aeute (PI. XI. fig. 1). 



Median piece of labrum not or scarcely overlapped 

 laterally by the lateral pieces, moderately narrowed caudad, 

 the caudal end triangular. Lateral pieces with caudomesal 

 corners characteristically broadly rounded. Anterior edges 

 of lateral pieces when produced forming a pronounced 

 obtuse angle. Margins wholly smooth (PI. XL fig. 2). 



Posterior corners of coxosternum of second maxillas acutely 

 produced ; entire region caudad of pores and a broad median 

 band areolate. Pores narrowly elliptic. Ectal angles of 

 coxae of first maxillae elevated and broadly rounded (PI. XI. 



Mandible with six lamellae, of which the first has six 

 teeth. Mesal corner below first lamella acutely produced, 

 the margin entire (PI. XL fig. 4). Teeth of median lamellae 

 all long, not reduced at proximal end, typically near fifteen 

 in number. 



Antennae moderately attenuated. Last article clearly 

 longer than the penult, but shorter than the penult and 

 antepenult together. Sixth article longer than Avide at 

 distal end, in about ratio 5 : 4. 



Exposed area of prosternum wider than long, in ratio 9 : 7. 

 Anterior margin with the two teeth normally developed. 

 Fernuroid with two teeth, these rather broad, low and 

 rounded, the distal one the larger. Next two joints also 

 bearing teeth, of which the second is decidedly the larger. 

 Claw with angulation at base, but without distinct tooth 

 above this (PI. X. fig. 10). 



First leg about three- fifths as long as the second. 



Sternal impressions of anterior segments furcate, but the 

 branches very short ; angle obtuse ; branches disappearing 

 caudad as usual (PI. X. fig. 11). 



Sternite of pregenital segment broad anteriorly, strongly 

 narrowed caudad, almost triangular, the caudal end rather 

 narrowly rounded. Coxopleuroc with a moderate number 

 of small pores, the total number on each side being twenty 

 of which about twelve are visible in strictly ventral view 

 Anal pores distinct. Last legs about twice as long as the 

 penult. 



Pairs of legs, 49. 



Length about 23 mm. 



Locality. — Fiji Is. : Nagasau (W. M. Mann coll.). 



Type in Mus. Comp. Zool. (No. 2161). 



