NO. 2253. DESCRIPTIONS OF TEN NEW ISOPODS— BOONE. 603 



LEPTOTRICHUS VEDADOENSIS, new species. 



Plate 92, fig. 3. 



Body elongate-ovate, subconvex, twice as long as wide, 6 mm., 3 

 mm., densely granulated. Head produced in front in a conspicuous 

 median lobe which is squarish with the anterior margin rounded 

 and is tilted upward and outward; the lateral lobes are large and 

 divergent and broadly rounded. The eyes are moderately large, oval, 

 complex, and situated at the base of the lateral lobes. The second 

 antennae have the first four articles of the peduncle subequal; the 

 fifth is much longer, about 1 mm.; the flagellum is biarticulate, the 

 first article being about two-thirds as long as the second and termi- 

 nating in a minute hook-like point; the flagellum is about as long 

 as the fifth joint; the second antennae extend to the anterior margin 

 of the second thoracic segment. 



Thorax: The first segment is slightly longer than the others, 

 about 1.1 mm., with its lateral margins expanded and surrounding 

 the head, the second to seventh segments, inclusive, are similar, sub- 

 equal, with their lateral parts moderately expanded and the post- 

 lateral angles gradually, acutely produced. The legs are similar, 

 subequal, and have the inner margin ornamented with brushlike tufts 

 of spines. 



Abdomen : The first and second segments are compressed and have 

 the lateral parts concealed by the seventh thoracic segment; the 

 third, fourth, and fifth segments are broadly expanded, forming a 

 continuous curve with the margin of the thoracic segments; the sixth 

 segment is abruptly narrow, triangulate, with the posterior margins 

 recurved. The peduncle of the uropod is broad, about two-thirds as 

 long as the terminal segment ; the inner branch is minute, placed at 

 the inner distal angle of the peduncle ; the outer branch is broken off. 



The posterior margins of the head, thorax, and first five abdomi- 

 nal segments are heavily carinated. The entirely dorsal surface is 

 densely granulated, has scattered minute pigment spots, and is finely 

 setiferous. 



The holotype (Cat. No. 50405, U.S.N.M.) and two paratypes 

 come from La Puntilla, Vedado, near Habana, Cuba, and were se- 

 cured and donated to the United States National Museum by Dr. 

 Mario Sanchez Roig. All these specimens are slightly broken. 



This species is very near Leptotrichus gixmulatus Richardson,^ but 

 differs from it in the following: (1) Greater length of the second 

 antennae, (2) in having the central lobe of the head longer or 

 greater, (3) in the shape of tclson, (4) the carinated aspect of the 

 margins of the segments is more pronounced and the entire specimen 

 is more compact than is Leptotrichus granulatus. 



^ Leptotrichus granulatus Richardson, Trans. Conn. Acad. Sciences, vol. 11, 1902, p. 303, 

 pi. 40, fig. 58. 



