186 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



paramedian sulci extending forward to tbo frontal sulcus. Prebasal 

 plate not apparent. 



Clypeus (see also notes A and H, pp. 189, 193) : Paraclypeal sutures 

 pronounced and complete; clypeus somewhat wider than long. Each 

 bucca anteriorly traversed by a distinct, oblique transbuccal suture. 

 With two clypeal areas, each very small and sub circular, contiguous 

 with the alveoli jof the most anterior setae, and containing minute 

 sclerotic fragments (and pores?). Otherwise clypeus uniformly, 

 coarsely areolate, without smooth areas. All setae as shown, short 

 and robust, deeply colored; anteriorly with four setae; posterior 

 geminate setae about one-third the distance from labium to 

 anterior clypeal margin. 



Labrum: Distinctly tripartite; separated from clypeus by a thin 

 membranous strip. Midpiece deeply colored; with six strong teeth. 

 Each sidepiece with a series of long acicular hyaline fimbriae on its 

 medial half. Each fultura well sclerotized and large. 



Prehensorial prosternum: Somewhat longer than wide; sides paral- 

 lel; anteriorly medially not diastemate, with two short denticular 

 projections. With a very shallow midlongitudinal depression. 

 Surface smoothly areolate; with eight very long setae, surface uni- 

 formly clothed wdth numerous minute, short sensory points (minute, 

 short setae). Pleuroprosternal sutures complete anteriorly; sclerotic 

 (chitin) lines abortive, in essence absent. 



Prosternal telopodite (see also note C, p. 190) : When closed extend- 

 ing well beyond cephalic frontal margin. Trochantcroprefemur with 

 a large dark, distomesal denticle, the article conspicuously excavated 

 just below denticle. Femuroid and tibioid ^vithout denticles. Tarsun- 

 gular denticle slightly smaller than those of basal article, the end 

 somewhat deflected, thumb shaped. Ungula falciform, robust, dark, 

 evenly gi-adually cui*ved; proximal two-thirds of its blade coarsely 

 serrulate. Poison calyx short, broad, subcordiform in outline, its 



Figures 18-24. — Lestophilus bredini, new species, holotype: 18. Sixth sternite (ventral 

 view, anterior end uppermost, major setae shown): a, Anterior bilateral (paired) pore fields; 



b, diamond-shaped subcentral pore field; c, broad triangular extension (metasternite) 

 of sixth sternite. 19. Clypeus, labrum bucca (ventral view, all setae shown): a, Left 

 bucca; b, transbuccal suture; c, left fultura {Komandibulares Geriist); d, tiny clypeal 

 area just anterior to seta. 20. Cephalic plate (dorsal view, major setae shown) : a. Coarse, 

 deep areolation of frontal sulcus; b, coarse, deep areolation of right paramedian suture; 



c, smoother, shallower areolation of frontal plate; d, smoother, shallower areolation 

 of area between paramedian cephalic sulci. 21. Right tarsungula and right tibioid (ventral 

 view, setae deleted) : a, Poison calyx, in situ and enlarged. 22. First and second maxillae 

 (ventral view, all setae shown): a. Minute, postmaxillary sclerite; ^, left statumen. 23. 

 Prehensorial prosternum and telopodite (ventral view): All major prosternal setae 

 shown; setae of telopodite deleted. 24. Ultimate pedal and postpedal segments, left leg 

 (ventral view): Setae of leg deleted; all others shown. 



