554 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



portion gradually narrowing cephalad to become very narrow at point 

 of articulation with vinculum; dorsal area rather broad and with mesal 

 portion consisting largely of prominent, very heavily sclerotized, 

 pentagonal or subcircular plate produced mesocaudad between and 

 articulating laterad with lateral margins of base of uncus. 



Harpe simple. Lateral aspect: apical half very slender, approxi- 

 mate apical quarter curving strongly ventrad; costa and sacculus 

 fused, comprising approximate basal three-sevenths of harpe, broadest 

 in apical half, basal half narrowing basad to subacute basal extremity; 

 glabrous except for punctate and setose, subdigitate, ventrocaudal 

 margin of sacculus; cucullus partially set off from costa and sacculus 

 by ventral area of reduced sclerotization, comprising apical four- 

 sevenths of harpe, with approximate apical three-fourths very slender; 

 basal half curving considerably dorsad, rather sparsely punctate and 

 setose ectad and entad; apical half curving evenly and strongly ven- 

 trad, becoming more heavily punctate and setose ectad and entad 

 toward apex; apex rather narrow, evenly rounded. 



Transtilla with arm rather short, approximately one-fifth as long as 

 harpe, moderately sclerotized, glabrous, basal two-thirds slender and 

 subparallel with dorsal margin of costa, apical third expanded and 

 overlapping costa, apex rounded, terminating at or near basal ex- 

 tremity of harpe. 



Uncus prominently bifid, large, very distinctive. Dorsal aspect: 

 base large, nearly rectangular, glabrous, mesobasal portion weakly 

 sclerotized and fusing with dorsomesal plate of tegumen, mesocaudal 

 portion very weakly sclerotized to membranous; lateral margins very 

 heavily sclerotized, subparallel, distinctly set off from tegumen laterad 

 by areas of greatly reduced sclerotization, basal portions considerably 

 expanded laterad; angle of bifurcation very broad; furcae with bases 

 broadly separated and produced mesoventrad into narrowly sepa- 

 rated pair of prominent, heavily sclerotized and darkened, sparsely 

 punctate and setose, semicircular plates with dentate margins; furcae 

 large, heavily sclerotized, very sparsely setose, curving or directed 

 very strongly ventrad; basal portions tubular, convergent, commonly 

 overlapping distad; apical portions flattened dorso ventrad, markedly 

 divergent; apices appearing acute or subacute in dorsal, ventral, 

 and lateral aspects; apices expanded, broadly and evenly rounded 

 in caudal aspect. 



Gnathos paired, moderately sclerotized, directed ventrocaudad; 

 arms large, elongate, flattened, overlapping distad, apical portions 

 finely pitted, apices broadly and evenly rounded. 



Anellus membranous, unarmed, juxta absent. 



Aedeagus rather short, approximately four-sevenths as long as 

 harpe, stout, somewhat flattened dorsoventrad, tubular, asymmetri- 



