chamberlin: chilopods from Mexico and west indies. 503 



Mandible with several pectinate lamellae. 



First maxillae with lappets present, these more or less dorsal in 

 position. Palpus biarticulate, the second article long. Inner branch 

 set off by a suture. Coxae fused at middle. Claw of palpus of second 

 maxillae simple, concave. Coxae fused at middle, the median portion 

 bulging ventrad and broadly triangularly extended caudad. Salivary 

 pore opening toward proximal end of coxal plate, the pore breaking 

 through the mesal border. 



Prehensors not large but considerably exposed from above. Claws, 

 when closed, not surpassing front margin of head. 



Prosternum with chitinous lines absent or vague. Anteriorly 

 widely emarginate; unarmed. Basal plate very wide; short. 



Dorsal plates with distinct paired submedian sulci. 



Prescutellum large, distinctly separated from the spiraculiferous 

 plate. In the anterior segments these sclerites touch the tergite, 

 there being no suprascutella. Farther caudad first one and then more 

 indistinctly two series of suprascutella appear between the two 

 sclerites mentioned and the tergites. 



Ventral pores occurring over most of plate excepting a median 

 transverse area. 



Last ventral plate wide. 



Coxopleurae without pores. 



Anal legs each consisting of five articles distad of the coxopleura; 

 clawless. 



Genotype. — T. maximus, sp. nov. 



Closely related to Notiphilides with which it agrees in having the 

 anal legs only five jointed. From this genus it is most readily distin- 

 guishable through the presence of the paired submedian sulci and the 

 absence of all suprascutella from a considerable number of the most 

 anterior segments. 



TiTANOPHILUS MAXIMUS, Sp. noV. 



Dorsum anteriorly yellow of dilute ochraceous cast; in median 

 region darker, testaceous, of dull olivaceous tinge; again lighter, 

 yellowish, at caudal end. Head light testaceous. Antennae and 

 legs yellow. Prosternum and prehensors like head. Venter anteri- 

 orly and caudally clear yellow, the median region testaceous of dull 

 weak olivaceous cast. 



Head with anterior margin wide, subtruncate or mesally widely 

 angulate; caudal margin widely convex or somewhat arcuate; head 

 depressed along caudal border each side of middle. Plate of nearly 

 same width anteriorly as posteriorly, sides convexly bulging between. 

 A short median longitudinal sulcus evident on caudal portion and a 



