386 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lis 



There is enough variation in this species and niimero^us so that all 

 characters which were thought to be distinctive were found to overlap 

 when more material was examined. 



I have seen males of this species from the District of Columbia, 

 Maryland, New Jersey, New York, Ontario, Pennsylvania, and 

 Virginia. 



Brachycentriis numerosus (Say) 



Phryganea numerosn Say, 1823, p. 160. 



Brachycentriis nvmerosus.- — 'Ross, 1944, pp. 264-265, figs. 899, 902. [Neotypes 

 designated.] 



Although males of this species and the preceding are easily separated, 

 no differences could be found between the females. 



Males of this species from Massachusetts, Michigan, North Caro- 

 lina, and Quebec were studied. 



Brachycentriis fuliginosus Walker 



Brachycentrus fuUginosus Walker, 1852, p. 88. 



Brachycentriis fuliginosus. — -Betten and Mosely, 1940, pp. 177-178, fig. 89. [Holo- 



type figured.] 

 Brachycentrus fuliginosus. — -Leonard and Leonard, 1949, pp. 7-8, figs. 5-8. [Male 



figured.] 



The figures of the female type presented by Betten and Mosely 

 do not show anj^ differences from females of incanus or numerosus. 

 Figures of a male, presumed to be this species, are to be found in 

 Leonard and Leonard. The species, of which I have seen no examples, 

 is recorded from Michigan, Ontario, and Quebec. 



Brachycentrus lateralis (Say) 



Phryganea lateralis Say, 1823, p. 161. 



Brachtjcentrus lateralis.— Ross, 1944, pp. 265-266, figs. 900, 903. [Neotypes 

 designated.] 



This species appears to have paler legs, antennae, and pilosity 

 than related species. It is possible to separate the females of this 

 species from those of the incanus type. In lateralis the setal area 

 of the ninth and tenth terga is confined to the apical third, rather 

 than occupying a half or more of the segment. 



Males from Illinois, Michigan, Quebec, and Pennsylvania were 

 examined. 



Brachycentrus nigrisoma (Banks) 



Figures 4:g,h 



Sphinctogaster nigrisoma Banks, 1905, p. 12. 



Brachycentrus notabulus Milne, 1936, p. 112. [New synonymy.] 



The unique female type of this species was studied and found to be 

 identical to the female allotype of notabulus Milne. The female sex 



