in the British Museum. 217 



border narrower than the anterior border of the first tergite, 

 its lateral margins strongly converging. 



Maxillary coxce, wide, lightly depressed longitudinally in 

 the middle line, sparsely punctured, without a trace of chiti- 

 nous lines, the anterior border notched ; the feet not long, 

 largely overlapping the head at the sides, but scarcely over- 

 lapping it in front, the joint of the claw falling short of the 

 anterior angles of the head ; the femoral segment armed 

 internally with one small tooth, the following two segments 

 obsoletely armed, the claw unarmed. 



Tergites smooth, shining, bisulcate, more than twice as 

 long as the prescuta. 



The tracheal sclerites in contact with the tergites and much 

 smaller than the prescutal sclerites. 



Sterm'tes in the anterior end of the body with a posterior 

 median porous area and an anterior median depression ; in 

 the middle of the body with a median longitudinal depression 

 and lightly depressed at the sides ; at the posterior end of the 

 body without depressions. 



Anal somite. — Tergite not covering the pleurae at the sides ; 

 pleurce very small and coxiform, without pores ; sternite wide, 

 much wider than long, with lateral margins strongly con- 

 verging posteriorly and posterior margin straight ; the pro- 

 sternal sclerite very large and conspicuous. 



Legs considerably longer than those of the preceding somite, 

 hairy, composed of six segments, unarmed, or, at most, armed 

 with a very minute claw ; much thicker in the male than in 

 the female. 



Number of pairs of legs, in ^ 55, in ? 57. 



Length 38 millim. 



Two specimens from Madeira, collected by my friend and 

 colleague Mr. W. li. Ogilvie-Grant, to whom I have great 

 pleasure in dedicating the species. 



This species is remarkable for the smallness of the anal 

 pleurae. 



Geophilus challengeri, sp. n. (PI. XII. figs. 3, 3 a.) 



Colour testaceous, with pale castaneous head. 



Body posteriorly attenuate, smooth and sparsely liairy. 



Head short, only a little longer than wide, obsoletely punc- 

 tured, posterior border straight, lateral borders nearly straight, 

 convex only in front and behind. 



Antennce of moderate length, attenuate, the apical segment 

 not larger than the penultimate. 



Prebasal plate visible; basal plate long and wide, more 



