CHAMBERLIN: CHILOPODS FROM MEXICO AND WEST INDIES. 505 
TITANOPHILUS FRATRELLUS, sp. nov. 
Dorsum anteriorly and at very caudal end of body ochraceous; in 
the middle of a distinctly olivaceous cast. The color of venter nearly 
the same as that of the dorsum. Head and prosternum with prehen- 
sors pale brown of a dilute olivaceous cast. Antennae and legs yellow. 
Body robust; narrowed at very caudal end and less obviously in 
anterior region. in 
Head subcordate; widest caudally and conspicuously narrowed 
cephalad, as a whole somewhat convex, the caudal border apparently 
sharply depressed, the elevated edge arcuate. Only a little wider 
than long (87:34). A short, deep median longitudinal sulcus on 
middle portion of plate. Cephalic plate not wholly covering pre- 
hensors from above. 
Basal plate very wide and very short; wider than the head; 6.5 
times wider than its median length. 
Antennae flattened as usual; very short; broad at base and uni- 
formly narrowing distad. Ultimate article short, pointed, a very 
little shorter than the two preceding articles taken together. 
Claws of prehensors slender; when closed not attaining front 
margin of head. 
Exposed portion of prosternum a little more than twice wider than 
the greatest length; five times longer than the greatest length of 
femuroid. Margin between prehensors wide, weakly concave; a 
vague, dark nodular elevation each side of middle. 
First dorsal plate wider than the basal plate and also than the 
second tergite. Not quite twice as long as the basal plate (ratio 11:6); 
shorter than the second in ratio 11:13; sides much converging caudad. 
Dorsal plates strongly bisulcate, with a much weaker or often obsolete 
median sulcus between the paired suici; sulci becoming weaker or 
obscure on most anterior and most posterior plates. . Anal tergite 
caudally semicircularly rounded or mesally somewhat obtusely angu- 
lar; equal in length and breadth. 
Prescuta in caudal region short but distinct, becoming very short 
cephalad. Prescutum of last pediferous segment longest at middle, 
running out to a point on each side, its caudal margin appearing 
convex and its anterior one straight. 
Ventral plates not specially marked. Last ventral plate broad 
but relatively much longer than in 7. maximus, being only twice as 
wide as long; sides straight, strongly converging; caudal margin 
weakly incurved from end to end. 
Ventral pores small, not very dense, occurring over all of sternite 
excepting the usual median area. 
Spiracles narrowly oblong, placed a little obliquely to the longi- 
