AKT.6 TEOPICAL AMERICAN APTEEYGOTA FOLSOM 6 



bears instead three teeth on one mandible and two on the opposite 

 mandible. 



The lacinia of the mandible also differs from that of Carpenter's 

 species, being palmately cleft (figs. 5, 6), some of the slender tapering 

 primary lobes bearing secondary teeth. 



The galea of the maxilla (fig. 7) bears an anterior subclavate 

 sensilla, mentioned by Carpenter. The lacinia is as in Figure 8. The 

 lingua (fig. 9) is rounded anteriorly, with serrate antero-lateral 

 margins. The swperlinguae {maxillulae) are not subtriangular as in 

 ■fimbriafipes, but are (fig. 9) rounded with the mesal margin an- 

 teriorly serrate, the teeth becoming successively smaller posteriorly. 

 Each superlingua bears meso-basally a fingerlike lacinial lobe (fig. 

 9). The palpus of the labium bears an anterior sensory papilla, as 

 in Figure 10. 



Legs.— The tihia has an apical pair of stout, fringed, articulated 

 spurs (fig. 11). The fringed pulvilli (fig. 12) are essentially like 

 those described by Oudemans and by Carpenter, and quite unlike 

 those figured by Silvestri. 



Styli. — Styli are present on the first seven abdominal segments. 

 Those of the first urosternum differ in form from the others, being 

 (figs. 13, 14) stout, scarcely tapering, blunt, clothed throughout with 

 setae, and ending in several spiniferous papillae. In the female 

 (fig. 13) there are two simple setae on the mesal side of the base of 

 the stylus. In the male (fig. 14) the stylus is relatively shorter than 

 in the female, and the posterior region of the sternum is thickly 

 clothed with setae; while the posterior border bears two rows of 

 spiniferous papillae. The styli of the remaining segments (fig. 15) 

 are elongate and tapering, each with 5 or 6 setae on the distal half, 

 and a pair of strong spines, apical and subapical, respectively. 

 Exserfile vesicles (fig. 15) are present on the second to the seventh 

 abdominal segment, inclusive. The base of the vesicle is not, how- 

 ever, stiff and cylindrical like that of fiTiihriatipes. 



Genitalia. — The external organs of reproduction pertain to the 

 eighth abdominal segment. In the male (fig. 16) the eighth uro- 

 sternum is prolonged posteriorly as a broad subtriangular lobe ending 

 in a median rounded setigerous lobe; under the apical portion is the 

 penis, composed of a pair of genital plates, described by Carpenter. 

 In the female (fig. 17) the large sternal lobe terminates in a pair of 

 blunt triangular lobes, each of which bears 4 or 5 setae ; under these 

 lobes is a pair of valves (fig. 18), each with 4 or 5 large setae. 



Telson, cerci. — The telson (fig. 19) is subtriangular. The tenth 

 sternum is divided posteriorly along the median line (figs. 20, 21). 

 The anal valves are apparently not strongly developed in this species. 



Only one intact cercus was present ; this being one-third as long as 

 the head and body. The segmentation of the cerci is not definite. 



