12 BULLETIN 63, LTNITED STATES NATIONAL MUSEUM. 



Cardo subparabolic in outline. Conical eminence at base of palpus 

 quite evident. Palpu.s and palpiaer punctate and setose; cardo more 

 finely so. 



Lahium {t\ dentipes, Plate 8, figs. 8 and 1.")). — Transverse, body 

 or j)alpie:er sul)quadrate, Avith what are apparently the chitinized 

 paraglosste expanded laterally and connate with the sides above the 

 insertion of the palpi. 



The ventral surface of the palpiger is transversely prominent ven- 

 trally between the palpi, and gradually declivous posteriorly to base; 

 rounded laterally basad to the palpi, apicad passing into the concave 

 and expanded paraglosste, which are directed outward and forward, 

 and rounded at apex. The basal joints of the palpi glide over the 

 concave surface of the paraglossse. 



The apical margin of the palpiger is not noticeably membranous, 

 but rapidly and obliquely beveled from the prominent interpalpal 

 surface, at its oral margin giving attachment each side of a brief 

 central interval, to a thick transverse tuft of rather stout but soft 

 golden cilia, which curve upward and forward. The corresponding 

 oral margins of the paraglossoe are also frimbriate with similar cilia, 

 which increase somewhat in length from within outward, longest at 

 apex and gradually diminishing to some extent externally, as they are 

 traced backward and inward along the floor of the mouth. The 

 cilia on the paraglpssa? are directed inward and forward as shown 

 in fig. 3, Plate 8. 



Labial palpi (Plate 8, fig, 3) rather small and three- jointed, in- 

 serted into the sides of the palpiger ventrad to the paragl<)sa\ Joints 

 one and two subequal, the first narrower and obconical, the second 

 slightly stouter and of similar form, the third a little longer, scarcely 

 triangidar (subpyriform), feebly flattened and constricted at base 

 within. (Compare figs. 3, 5, and 6, Plate 8.) 



Ligula {h\ dentipes, Plate 8, fig. 13). — The internal surface of the 

 labium is membranous and marked by a median groove that ends 

 posteriorly at an oval but small eminence; anteriorly just within the 

 apical margin on each side of the median groove is a rounded convex- 

 ity; they lie within a triangular area bounded anteriorly by the cilia 

 of the apical margin, and laterally by two converging rows of cilia, 

 which jiass inward and backward from the apices of the paraglossa* 

 to terminate at the oval eminence. Kxternally to the rows of cilia 

 the surface declines to the external margins of tlie paraglossa% and 

 scattered over which are a numl)er of rather short hairs. Upon the 

 oval membranous eminence at the apex of the triangle is a small ar- 

 cuate row of very small seta*; these are at the j)roxinial end. 



Protliorax. — Inlet bounded above by the apical margin of the 

 ])ronotum, below by the apical margin of the prosternum. Laterally 

 within the apical angles is a small ti'iangular area, which may be 



