Genera and Species c/Scolopendridce. 59 



are small and weakly dentate and the femoral segment of the 

 appendage is furnished with a distinct internal tooth. 



In fact, this new genus appears in a way to connect the 

 genus Heterostoma with Rhysida and Trematoptyclius. 



Ethmophorus monticola, sp. n. (PI. IV. figs. 4, 4 a.) 



Body flat, stout, widest at the twelfth somite, much nar- 

 rowed anteriorly, slightly so posteriorly, the first tergite only 

 moderately wider than the second. 



Colour of tergites piceous, with a tinge of violet ; head, 

 first tergite, maxillary feet, and anal pleurge obscurely casta- 

 neous ; antennae ochraceous ; sternites and legs olivaceous, 

 the latter with the distal segments ochraceous. 



Head-plate small, about as wide as it is long, feebly punc- 

 tured. 



Antennai (fractured), with the four basal segments naked. 

 Maxillary sternite and feet feebly punctured, the prosternal 

 plates very small, like those of, e. g. } a Scolopendra, each 

 furnished with four obscurely defined obtuse teeth ; femoral 

 segment of the jaws furnished with a well-developed sub- 

 dentate basal tooth, as in, e. g. } Scolopendra. 



Tergites lightly wrinkled mesially and laterally, from the 

 third bisulcate, from the seventh marginate. 



Sternites not bisulcate, marked with three faint impressions, 

 two lateral, representing the sulci, and one posterior and 

 median. 



Anal somite. — Tergite wider than long, wider behind than 

 in front ; pleurw long, slender, rounded, finely porous, reaching 

 almost to the end of the femur, terminated by two spines, 

 whereof the inferior is much the larger, either with or without 

 a small superior spine and with one or two minute lateral 

 spines ; sternite with a median impression and very strongly 

 emarginate hinder border ; legs of moderate length, normally 

 slender, with cylindrical segments, the femur armed with a 

 simple, short, spiniform process, and with three spines beneath, 

 one minute and internal, and two in the middle and at the 

 posterior end, one large, the other very minute and behind it ; 

 patella and tibia normal (tarsal segments absent). 



Legs. — Claws armed with two spurs ; tarsi of the preanal 

 legs unarmed, tarsi of the rest with a single spur. 



Measurements in millimetres : — Total length 123 ; width 

 of twelfth tergite 12, of first 10, of twenty-first 8*3, of head 

 8"5 ; length of pleura from the apex to point of attachment 

 with tergite 8*5 ; length of anal femur 9*5. 



