522 bulletin: museum of comparative zoology. 



Tergite of last pediferous segment with caudal margin strongly 

 rounded; sides but slightly converging caudad; narrower than the 

 penult tergite. 



Coxopleurae strongly enlarged but less elongate than usual. Densely, 

 finely porose as usual. 



Anal leg much exceeding the penult, moderately thickened in the 

 male. Second tarsal article slender, with the usual minute mem- 

 branous appendage at its end. 



First legs considerably shorter and more slender than the second 

 which are of full size. Anterior legs clearly shorter and stouter than 

 the posterior ones. 



Pairs of legs 113 (cf ). 



Length about 35 mm. 



Locality.— Haiti: Mannville, December, 1912 (W. M. Mann). 

 Type. M. C. Z. 1717; one male. 



This is the most aberrant species of the genus. 



Lestophilus, gen. nov. 



Head without evident frontal suture. Basal plate wide, largely 

 overlapped by the cephalic plate, the exposed portion being very short. 

 Dorsal plates bisulcate. 



Antennae short, filiform. 



Labrum free, tripartite. The median piece of good size, not at all 

 overlapped by the lateral; its free margin with a series of stout 

 conical teeth which are much less slender and spiniform than in 

 Taiyuna (six in genotype). Lateral pieces fringed with many slender 

 spinescent processes which are more numerous than in Taiyuna. 



Outer process of first maxillae distinctly biarticulate, bearing two 

 very long membranous lappets. Inner process set off by a distinct 

 suture. Coxae completely coalesced. Second maxillae with coxae 

 almost completely separated at middle, there being but a pale mem- 

 branous connective or isthmus. The entire anteromesal border, or all 

 excepting most mesal end, more strongly chitinous and at times 

 appearing almost as a separate sclerite (Plate 5, fig. 4). Pleuro- 

 sternal suture strongly marked; pore situated mesad of the suture a 

 little in front of middle of its length and opening through the mesal 

 margin. The sclerite at angle small, not at all enlarged or extended 

 cephalad as in Teloericus and Nesidiphilus and no median chitinous 

 process present (Plate 5, fig. 5). Palpus triarticulate ; terminating 

 in a large simple claw; none of the joints with processes. 



Prehensors large, conspicuously exposed at the sides and projecting 

 much beyond front margin of the head. Claw armed at base with a 



