178 Psyche [August 



A NEW JAVAN CHILOPOD OF THE GENUS MECIS- 

 TOCEPHALUS. 



By Ralph V. Chamberlin. 



Museum of Comparative Zoology^ Cambridge, Mass. 



At Honolulu, Hawaii, a number of millipeds and centipeds 

 were taken on Mar. 8, 1922, from soil of a shipment of plants 

 from the Botanical Gardens of Buitenzorg, Java. Among these 

 specimens, which were submitted to the writer for identification, 

 were numerous specimens, mostly young, of the new species of 

 Mecistocephalus described below. This form belongs to the 

 lesser group of species in which the sternal impressions are not 

 furcate anteriorly, and apparently has its nearest relatives in M. 

 a-palor Chamberlin and M. moniicolens Chamberlin, previously 

 described from the same region. Two other chilopods were in 

 the collection, Otostigw.us fern Pocock being represented bj^ one 

 specimen, and a species of Lamydes, not in identifiable condition, 

 by another. Two diplopods were represented, Trigoniulus 

 lumhricinus (Gerstsecker) and Oxidus gracilis (Koch), the latter 

 being a species long ago introduced into this country and Europe 

 and often known as "the hot-house milliped." 



Mecistocephalus tridens sp. nov. 



Head and prehensorial segment chestnut, the remaining 

 parts yellow. 



Head wider than long in the ratio 14:9. Widest anteriorly 

 and narrowing caudad, more abruptly so over caudal fourth of 

 length, the general narrowing less marked than in apator. An- 

 terior margin nearly straight, much as in apator. 



Clypeal region with no anterior, non-areolated areas. 

 With six principal setae arranged as in monticolens, the sublateral 

 teeth being also nearly of same from as in that species. 



General outline of labrum as in mordicolens, but the median 

 piece narrower and about as wide behind as in front with the 



