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U. S. NATIONAL MUSEUM BULLETIN 216 



Figure 3. — Localities for 

 Scambus (Endromopoda) 

 detritus. 



sparse, fine punctures; legs stout; abdomen stout, with tergite 1 as 

 wide as or a little wider than long, and with its sides punctate and more 

 or less rugose, and the apex of the central area finely, rather densely 

 punctate; tergites 2-4 with numerous, rather unevenly distributed, 

 distinct punctures, except on apices; tergite 5 with punctures rather 

 shallow and indistinct except at base; tergites 6 and 7 with very 

 shallow, indistinct punctures; sternites large and broad, with coarse, 

 aciculate punctures; subgenital plate with a small, shallow, basal, 

 membranous excision; sheath about 0.4 times as long as abdomen. 



Black. Pedicel yellowish to reddish beneath; flagellum pale red- 

 dish beneath, with apex sometimes entirely reddish; clypeus piceous; 

 palpi yellowish brown to fuscous; tegula pale yellowish; hind angle of 

 pronotum narrowly pale testaceous; stigma brownish black, with base 

 and apex narrowly sordid yellowish; wing tinged with brownish; legs 

 mostly reddish, with front coxa often more or less fuscous at base; 

 hind tibia without contrasting markings, sometimes almost uniformly 

 reddish, but more often with indistinct, brownish to fuscous subbasal 

 and apical bands, and with the central region broadly dull reddish 

 yellow above, becoming pale reddish beneath; hind tarsus reddish, with 

 basal two or three segments broadly yellowish at bases. 



Specimens (32 d 1 , 749): From Alberta (Lethbridge) ; British Co- 

 lumbia (Agassiz, Cultus Lake, Milner, Robson, and Royal Oak); 

 California (San Mateo); Idaho (Chatcolet Lake); Massachusetts 

 (Beach Bluff, Gloucester, Holliston, Petersham, "Westhome," and 

 Woods Hole); Michigan (Baraga Co., Cheboygan Co., Dickinson Co., 

 Leelanau Co., Macomb Co., Manistee Co., Midland Co., Osceola Co., 

 and Wexford Co.); Minnesota (Brooklyn Center in Anoka Co.); 

 New Brunswick (Moncton); New Hampshire (Jaffrey); New York 

 (Bemus Point, Darien, Ithaca, Joy, Labrador Lake in Cortland Co., 

 McLean Bogs in Tompkins Co., Poughkeepsie, Randolph, and 



