chamberlin: the chilopoda of brazil. 211 



toothed; the lateral pieces smooth, not longitudinally striate; not 

 much bowed. 



From each anteroectal corner of labrum a suture extends obliquely 

 cephaloectad, separating the median from the lateral divisions of the 

 ventral portion of the cephalic plate; lateral division narrowed caudad, 

 the mesal edge strongly chitinized and extended cephalad into an 

 angular process as in related genera. 



ISIandibles with pectinate lamellae only. 



First maxillae with coxae completely separated, though closely 

 appressed at median line. Inner branch clearly separated from coxa; 

 subtriangular; distally prolonged into a conspicuous membranous 

 lobe which is nearly as long as the proximal portion. Outer branch 

 with second and third divisions completely coalesced; narrow; ex- 

 tended distally into a long membranous lobe like that of inner divi- 

 sion; no lappets present. Second maxillae with coxae rather short; 

 coalesced at median line but more narrowly than in Mecistocephalus, 

 etc. Pore of salivary gland on ectal portion of coxosternum near 

 middle of length, not at caudal angle, the passage extending ectad to 

 lateral margin. Palpi terminating in short, nearly straight, claws. 



Prehensors large, much exposed from above. 



Claws extending beyond front margin of head. Some of joints 

 mesall}' armed. 



Basal plate narrow. 



Prebasal plate not exposed. Pleurae exposed at sides of basal plate. 



Dorsal plates bisulcate. 



Ventral pores absent. 



Last ventral plate subtriangular. Coxopleurae large, porose. 



Anal legs with six joints distad of coxopleurae; clawless. 



Anal pores present. 



Type. — T. intermedins, sp. nov. 



This genus is most closely related, apparently, to that embracing 

 carniolensis, limatus, etc. (Mecistocephalus of most authors). It 

 is different chiefly in the following points : — the materially greater 

 shortness of the coxopleurae of the second maxillae and particularly 

 the difference in position of the salivary pore, this being at about 

 middle of length and toward lateral margin, not at extreme caudal 

 angle as in Mecistocephalus, etc. ; and the lateral divisions of the lab- 

 rum being unarmed, that is smooth, and not longitudinally striate. 

 Also the hairs of labrum are much more sparse. From Mecistocepha- 

 lus proper (piinctifrons Newport, etc.) it may readily be separated 

 through the absence of the strongly chitinized process or tooth on the 



