528 bulletin: museum of comparative zoology. 



Tergites with the paired sulci distinct as usual. A median sulcus 

 also commonly clearly impressed. 



Anterior spiracles large, vertically subelliptic. The first one largest. 

 Others decreasing gradually caudad and beyond the first few becoming 

 strictly circular. 



Ventral plates with a median longitudinal sulcus which is deepest 

 caudad. 



Ventral pores more numerous than usual in the genus; arranged in a 

 transverse band in front of the caudal margin, the band being widest 

 at the middle when it is somewhat extended cephalad along the 

 groove. Last ventral plate narrow. Sides a little concave cephalad 

 but mesally straight, converging caudad, abruptly a little more strongly 

 so toward caudal end. Caudal margin straight. 



Coxopleurae considerably inflated. Pierced by numerous small 

 pores above and below as usual, fewer on lateral surface and caudal 

 end poreless as usual, the pore-free area largest above. 



Last tergite somewhat narrower than the preceding one, leaving the 

 coxopleurae more ex-posed above than usual in the genus. Sides 

 straight, moderately converging caudad. Caudal margin straight. 

 Nearly equal in length and breadth or but slightly longer. 



Anal legs in the female longer than the penult, slender, the joints 

 decreasing in diameter distad. Last tarsal joint especially slender, 

 narrowing distad. Hairs mostly long, sparse. 



Anal pores distinct. 



Pairs of legs 77 ( 9 ) • 



Length about 36 mm. 



Locality. — Haiti: Petionville, November, 1912 (W. M. Mann). 

 Type, M. C. Z. 1712; one female. 



GEOPHILIDAE. 

 PIESTOPHILINAE. 



LEPTOPHILUS, gen. nov. 



Head without frontal suture. Basal plate very wide. Dorsal 

 plates bisulcate. 



Labrum free; tripartite. Median piece large, armed with a series 

 of stout conical teeth (six or seven in genotype). Lateral pieces with 

 a fringe of spinescent processes as in Geophilus. 



Coxae of second maxillae united at middle only by a weak mem- 

 branous isthmus. Palpus triarticulate, ending in a simple claw. 



