PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 59. 



(fuscus, black in allusion to the color.) 



Remarks. — This species may be distinguished from the others be- 

 longing to the genus by its darker color, by the presence of visible 

 eyes, and by the large dorsal plates on the fourth segment. The 

 posterior processes of the genital segment are also strongly flattened 

 dorso-ventrally, and the inner margins are curled over dorsally. 

 The lateral areas of the fused second and third segments are sepa- 

 rated from those of the cephalothorax and project backward as far 

 as the fourth segment. 



ELYTROPHORA HEMIPTERA, new species. 



Plate 2, figs. 13-19. 



Host and record of specimens. — A single female without egg 

 strings was found in a jar with Temnopleurus pnewnaticus, a new 

 Echinoid from Nagasaki, Japan, by the Bureau of Fisheries steamer 

 Albatross. The nature of this parasite is such that its association 

 with the Echnoid is in all probability accidental. 



The specimen has been given Cat. No. 53556, U.S.N.M. 



Specific characters of female. — Carapace only moderately convex, 

 a trifle wider than long, evenly rounded except posteriori}^ where 

 it is rather squarely truncated. Its upper surface is divided by 

 two longitudinal furrows, curved like parenthesis marks, into three 

 areas. The central area extends from the frontal plates to a trans- 

 verse groove between the first and second thorax segments. At its 

 anterior end the cephalic area is indicated by a semicircular groove, 

 with the two small eyes just visible near the posterior margin. 

 Each lateral area is divided by a transverse groove into a longer 

 anterior and a shorter posterior portion. The former is a part of 

 the head, the latter of the first thorax segment. The grooves across 

 the lateral areas are considerably in front of the one across the cen- 

 tral area. 



The second and third thorax segments are fused and lie between 

 the posterior portions of the lateral areas. The second segment has a 

 pair of short curved lateral wings or areas, which lie just inside 

 those belonging to the first segment; the third segment has none. 



The fourth or free thorax segment has a pair of dorsal wings, 

 which are fused on the midline at their bases, while the tips are free 

 Furthermore, the basal half of each wing is thickened and opaque, 

 while the terminal half is thinner and semitransparent. They thus 

 resemble closely the wings of many of the Hemiptera, and this has 

 suggested the specific name. 



The genital segment is barrel shaped, slightly widened posteriorly, 

 with a broad dorsal lobe at each posterior corner. These lobes or 

 wings are attached to the segment diagonally, are more fully chitin- 

 ized than the segment itself, and are darker in color. 



