74 Journal New York Entomological Society. ^^'°^- xxvi. 



lateral and caudal margins of the segments narrowly silvery ; an indistinct 

 brown sublateral line. Basal sternites light brown, the caudal margin silvery, 

 with an indistinct subterminal median brown spot; sternites five to eight 

 much darker, purplish-brown, ringed caudally with silver. Alale hypopygium 

 with the ninth tergite hollowed out into a strongly chitinized saucer, the lat- 

 eral and posterior margins narrowly raised and blackened (as in centralis 

 Lw.) ; the caudal margin is concave and roughened into irregular teeth or 

 denticles ; viewed from the side the margin of the tergite shows two teeth 

 at the ends of the rim, the innermost acute, directed dorsad and caudad, the 

 outermost flat, directed caudad. Ninth pleurite complete or nearly so, the 

 ventral caudal angle produced into flattened plates that bear the inner pleural 

 appendages in their concavity ; outer pleural appendage flattened, broadly oval. 

 Ninth sternite profoundly incised by a very narrow notch. Eighth sternite 

 weakly carinate, unarmed. 



Habitat : Kamchatka. 



Holotype, J*, Kamchatka (L. Stejneger). 



Genus Nepjirotoma IVleigen. 

 Nephrotoma stejnegeri new species. 



Alale.- — Length 17 mm.; wing 14 mm. 



Frontal prolongation of head short, shiny yellow; nasus slender. An- 

 tenna of moderate length, the first segment yellow, the remainder of the 

 organ dark brown ; flagellar segments slender, the basal swelling equal to 

 about one-third the length of the segment. Head orange-yellow, on the pos- 

 terior part of the vertex and on the occiput with a broad brown stripe. 



Mesonotal prasscutvim yellow with three broad black stripes, the lateral 

 pair straight (as in Ittnulicornis, aculeata, etc.), not curved at their anterior 

 ends, crossing the suture and occupying the anterior parts of the scutal lobes; 

 another large brownish-black mark on the posterior inner portions of these 

 lobes ; scutellum brownish-yellow ; postnotum yellow with a narrow, distinct 

 brown line. Pleura yellow with reddish blotches. Halteres brown. Legs 

 with the coxae light yellow, the base of the fore coxa reddish ; trochanters 

 yellow; femora yellowish-brown, the tips narrowly dark brown; tibiae and 

 tarsi brown. Wings with a very faint brownish-yellow tinge, the costal cell 

 very indistinctly yellow ; stigma oval, brown ; veins dark brown. Venation : 

 Rs oblique ; cell Mj petiolate, the petiole about equal to r-m ; m-cu punctiform, 

 located far before the fork of M. In both wings of the type a nearly or en- 

 tirely complete cross-vein near the end of cell R^. 



Abdominal tergites yellow with a broad blackish-brown median stripe that 

 is narrowly interrupted at the caudal margin of each segment, on segments 

 7 to 9 occupying almost the entire segment; extreme lateral margins of the 

 tergites with an elongate dark brownish mark, on the basal segments with two 

 such marks, one basal, the other near mid-length of the segment; sternites 

 dull yellow with a narrow brown median line. Eighth sternite dark brown, 

 the caudal margin yellowish. Hypopygium with the ninth tergite rather 



