38 



G. 0. SAKS. 



[No. 8. 



The antenuæ (PL 7, fig. 5), as compared with those in 

 other Lynceidæ, are rather powerfully developed, the basal part 

 strongly curved and composed of 2 distinctly marked segments, 

 of which the distal is the larger and provided anteriorly with. a 

 transverse row of delicate spinules. Both of the branches are 

 tri-articulate, the exterior a trifle longer than the interior, 

 and having only 3 natatory setæ, proceeding from the apex. 

 besides 2 strong spines, the largest of which is affixed to the 

 end of the Ist joint exteriorly, whereas the other proceeds from 

 the last joint. The inner branch has likewise at the tip of the 

 last joint 3 natatory setæ and a spine, but, in addition, each of 

 the two other joints is provided interiorly with a short natatory 

 seta, and exteriorly, with a transverse row of slender spiaules. 



The anterior lip. or labrum (see PL 8, fig. 1), projects 

 inferiorly, in front of the carapace, as a broad and compressed 

 securiform lamella, the inferior edge of which is densely fringed 

 with very small cilia. 



The mandibles (PL 7, fig. 3) exhibit the usual structure, 

 with the molar extremity broadly truncate and presenting an 

 uneven and, as it were, fiuted surface, being furnished, moreover, 

 at the periphery with a dense clothing of hairs and some few 

 strong denticles. 



The maxillæ (fig. 4) are very small, and exhibit at their 

 extremities 3 incurved plumous setæ, the median being much the 

 longest. 



Of legs, 5 pairs only are present, somewhat dissimilar in 

 appearance, and, as a rule, becoming more delicate in structure 

 posteriorly. As no detailed description has previonsly been given 

 of these organs in the true Lynceidæ, save in the anomalous 

 genus Eurycercus, I have sought to determine as closely as pos- 

 sible the structure of the said limbs in the present species, having 

 for that purpose carefully dissected several specimens. As will 

 appear from figs. 2 — 6, Pl. 8, they exhibit on the whole a some- 

 what approximate resemblance to those in the genus Acantho- 

 leberis, first described by Schoedeler, and more recently by the 

 Danish naturalist Lund. 



