i8o Annals Entomological Society of America [Vol. II, 



lo. Geophilus deducens sp. nov. PL XXV, figs, i, 2, 3. 



Gradualh' attenuated cephalad, more abruptly and strongly so 

 caudad. 



Dorsum brown, smoky or blackish along the middle. Venter clear 

 brown. Head and prehensorial feet pale chestnut, the antennae simi- 

 lar. Legs pale yellow. 



Antennae short. Articles decreasing in length distad, the ultimate 

 somewhat shorter than the two preceding together. 



Cephalic plate longer than wide (4.2:3.7). Posterior margin trun- 

 cate, anterior margin widely excurved, not mesallv emarginate; anter- 

 ior angles scarcely rounded, the sides caudad of them for about a third 

 of length straight and diverging, then over middle portion straight 

 and sul)paralle], posteriorly rounding mesad to posterior margin. 

 Roughened posteriorly and laterally. Basal plate about 2.6 times as 

 wide as the median length. Prebasal plate mesally exposed. 



Claws of the prehensorial feet when closed extending beyond front 

 of head, attaining the middle of the first antennal article. Claw with 

 a rather pale, short blunt tooth, other joints without teeth. Prester- 

 num a little wider than long (5:4.8). Presternum coarsely punctate, 

 the femora nearly smooth or with some finer punctae. 



Dorsal scuta bisulcate, some of the anterior ones also with an inner 

 pair of sulci; roughened. Anterior praescuta short, becoming at and 

 caudad of middle moderate-long, not much shortened in posterior seg- 

 ments. 



Spiracles all round; the first large, slightly vertically elongate, the 

 third being much smaller and the second intermediate in size; caudad 

 becoming very small. 



Anterior ventral scuta with a wide median depression marked with 

 a longitudinal sulcus which does not extend to either the anterior or 

 the posterior border, the depression disappearing on posterior segments 

 and the sulcus becoming longer. 



Last ventral plate very wide; the anterior margin on each side 

 extending forward from side to median line, thus forming a broad 

 angle; sides nearly straight, strongly converging, the posterior margin 

 widely excurved. Each pleura with two large pits which are wholly 

 covered by the last plate. 



Anal legs rather short, slender, armed with a long claw. 



Anal pores not evident. 



Pairs of legs ol. 



Length 38 mm. Width 1.3 mm. Length of antennae 2.9 mm. 



Locality — Sea Clift", Long Island, New York (N. Banks). 



This species is evidently closely related to the attenuatus 

 group, although clearly distinct. 



