rill-: CANADIAN 1':nt<)\u)I.()(;is]- 187 



Prolamnonyx Silvestri. 

 P. holslii (Pocock), ['I'A), p. 352. Japan; China. 

 P. indccorus (Attorns), (2). p. 287. =P. holstii (Pocock) 

 P. santeri SiKcstri. (27), p. S7. I'omiosa. 



Arrup ("hanihcrlin. 

 A. pylorus Chanihi'lin, ((1), p. ()")!. California. 



l)i:s(RiPTiON OF Nf.w I'okms. 



Mecistccephalus nannocornis, sp. no\ . 



Dusky brown, the head darker, more blackish. 



Head coar.sel>' deoply punctate; exceptionally short in proportion to width, 

 being only 1.4 times longer than wide; frontal suture very distinct as in most 

 species, the suture bowed forward at its middle. Tooth on ventral side of 

 anterior corner nnich retluced. Anti'nn;i' \er\' short, scarcely reaching to (Mid 

 of first tergitc. 



Tergites une\en, roughened; sulci in middle and posterior regions \ery 

 strongh' impressed. 



Prosternum proportionately short and wide, rather Fineh' punctate; anterior 

 margin with two low, rounded teeth. Prehensors with femuroid bearing a single 

 tooth at distal end; second and third joints also armed; claw with tooth low and 

 slight, almost obsolete. Sternites willi a deep median longitudinal sulcus not 

 bifurcate at its anterior end. 



Last ventral plate strongly narrowed caudad, the caudal margin straight. 

 Coxopleurae with pores of moderate size, not crowded, about thirty on each side. 



Last dorsal plate broad and shield-shaped. 



Pairs of legs only forty-five. 



Locality.— P. L; Mt. Makiling. (C. F. Baker). 



Type.— M. C. Z., No. 20UG. 



Like spissus Wood, occurring in the Hawaiian Is., in the number of pairs 

 of legs; but readily distinguished by its proportionately much shorter head, etc. 



Megethmus pluripes, sp. nov. 



This species may be distinguished from microponis in the smaller coxo- 

 pleurio of the last segment which enroach upon the penult segment only as far 

 as the spiracle, not reaching the anterior end; pores similarly \ery numerous 

 and fine. Pairs of legs ninety-seven instead of one hundred and one. 



General colour fulvous; head and prehensors red or light chestnut. 



Head very long and narrow, being just twice as long as the greatest width. 

 Paired sulci close together, parallel, distinct for a short distance in front of 

 caudal margin, then becoming vague Antenna? long; joints all long. Mandible 

 with nine dentate plates of which the first has but three teeth and a median one 

 near twenty of which the more proximal are more widely spaced. Median piece 

 of labrum cuneate; lateral pieces with margin wholly smooth, mesal tooth but 

 vaguely indicated. 



Basal plate with a sharply impressed median longitudinal sulcus. Pro- 

 sternum sparseh' punctate; unarmed anteriorly. Femuroid of prehensors each 

 with two stout black teeth on mesal side of which the distal one is much the 

 larger; teeth of second and third joints black, rounded; tooth of claw \ery low, 

 indistinct. 



