NEARCTIC TRICHOPTERA — FLIXT 385 



Part of the syiitypic scries of intervena is at the U.S. National 

 Museum, where the type was stated to be placed, and part at the 

 Museum of Comparative Zoology. I am designating here as lectotype 

 a male in the collection of the U.S. National Museum, bearing the 

 following labels: "Zavalla Co., Nueces Riv. rV.26.10 Tx/at light/ 

 Hunter & Pratt Coll/Type No. 18273 U.S.N. M./Zep^ocgZk intervena 

 Bks. Type [in Banks' writing]/Lectotype Leptocella intervena Bks. 

 Designated Flint 1965." 



The only difference between the lectotype of intervena and a male 

 paratype of diarina at the Museum of Comparative Zoology is in the 

 darkness of the V-marks along the posterior margin of the forewing. 

 In diarina they are nearly black, in intervena mostly brown, a difference 

 I do not think to be of specific value, considering the lack of other 

 characters. 



In all likelihood more material will show intervena to be a synonym 

 of texana and possibly even of alhida. 



Leptocella stigmatica Banks 



Figure 4d 



Leptocella stigmatica Banks, 1914, p. 262, fig. 48. 



Leptocella stigmatica Ross, 1938b, pp. 22-23. [Lectotj^pe designated.] 



This species is recognized easily by its nearly black coloration and 

 the large eyes and shape of the clasper in the male. 



Family Brachycentridae 

 Genus Brachycentrus 



The genus Brachycentrus in northeastern North America contains 

 at least six species easily recognized in the male sex. In certain 

 species the females are also distinctive, for example, B. nigrisoma 

 (Banks), B. lateralis (Say), and B. americanus (Banks). However, 

 there are three species, B. incanus Hagen, B. numerosus (Say), and 

 B. Juliginosus Walker, in which I am totally unable to differentiate 

 between the females. To compound this difficulty, the types of two 

 of these, incanus and fuliginosus, are unique females. Because, 

 then, I am unable to obtain conclusive evidence from the types as to 

 which name goes with which species, the names will be applied here 

 as they are recognized in the literature. 



Brachycentrus incanus Hagen 



Figures 4e,f 



Brachycentrus incanus Hagen, 1861, p. 272. 



Brachycentrus incanus. — Denning, 1941, pp. 202-203, fig. 8. [Male allotype 

 designated.] 



Figures are here presented of the female type of this species. 



