22 PROCEEDINGS OF THE NATIONAL MUSEUM vol.72 



Description. — Body slender and narrow, twelve times as long as 

 broad, narrowed and rounded at the ends but the sides parallel ; sur- 

 face covered with short hairs. 



Head small, broadly triangular-oval in outline ; vertex inflated, the 

 sides strongly converging but the labrum rounded or slightly trun- 

 cate below; antennae inserted at the sides below the middle; vertex 

 prominent, inflated. 



Eyes wanting. 



Antennae rather slender, distinctly clavate; joint 6 much the 

 largest; joint 5 not greatly exceeding joint 4; joint 7 well developed, 

 about half as long as joint 6, subconic, truncate. 



First segment without carinae; much narrower than the second, 

 scarcely wider than the head; surface not tuberculate, a distinct 

 prominence near the posterior corner. 



Segments gradually broader from the second to the fifth; carinae 

 of anterior segments turned forward, five to six tubercles in the 

 anterioj* row, three to four in the posterior; margins of carinae dis- 

 tinctly thickened, more strongly around the pore. 



Repugnatorial pores on thickened posterior corners of the carinae; 

 on anterior segments somewhat in front of the corner, on posterior 

 segments directly at the apex of the produced carinae. 



Last segment a closed cylinder projecting well beyond the pro- 

 duced corners of the penultimate segment. 



Sterna narrow, the coxae nearly in contact ; each ventral plate with 

 median process directed obliquely forward, between the coxae of the 

 preceding pair of legs. 



Legs rather long and slender, extending somewhat beyond the 

 sides of the body ; coxa scarcely thicker than the femur ; coxal aper- 

 ture small, on a slight posterior prominence of the joint. 



The generic name alludes to the more slender body with the carinae 

 smaller and the anterior subsegments more exposed than in 

 Braohycybe. 



ISCHNOCYBE PLICATA, new species 



Number of segments attaining 55, Length of largest speciment, 19 

 mm., width 1.5 mm. Body long and slender, gradually narrowed in 

 front and behind ; dorsum rather strongly convex and with depressed 

 and outwardly somewhat upturned lateral carinae longer than in 

 Brachycyhe but not as broad. 



Color a very distinct pink in living specimens but changing to a 

 rather reddish brown when placed in alcohol. 



Head completely visible in front of the first segment; pilose; 

 broadly cordate, narrowing abruptly in front to an obtusely angular 

 snout; vertex and front greatly inflated; eyes lacking; antennae 

 placed on the sides of the head below the middle ; rather long, exceed- 



