56 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



cases embedded in the sand bottoms of 

 southern Wisconsin streams. These cases 

 he records as sometimes 65 mm. long, the 

 greater portion buried, only 10-20 mm. of 

 the case projecting from the stream bed. 

 Within this case the pupa spins its cocoon. 



This species is fairly widely distributed 

 throughout the Northeast. Our records 

 from Indiana and Illinois appear to be on 

 the southern limit of the western portion 

 of the range. It is known from Georgia, 

 Illinois, Indiana, Maine, Michigan, Minne- 

 sota, New Brunswick, New York, Nova 

 Scotia, Ohio, Ontario, Quebec and Wis- 

 consin. 



Illinois Records. — Golconda: April 17, 

 1930, Prison & Ross, 2$, 1$. Herod: 

 May 10. 1935, C. O. Mohr, 1 ? . 



Phylocentropus lucidus (Hagen) 



Polycentropus lucidus Hagen (1861, p. 294); 



This species has not yet been taken in 

 Illinois. It is known from New York, Nova 

 Scotia, Pennsylvania and Tennessee. In the 

 front wing Rg does not join M, and on this 

 basis the species was referred to a new 

 genus, Acrocentropus, by Betten. The struc- 

 tures of the male and female genitalia, how- 

 ever, indicate clearly that it belongs with 

 placidus. The female is similar to the male 

 in color and in general structure ; the 

 genitalia, fig. 220, have the eighth sternite 

 heavily sclerotized, the apex broad, slightly 

 indented on the meson, resulting in very 

 wide lobes; bursa copulatrix long, semi- 

 membranous, and attached to sclerotized 

 rods of the ninth segment. 



Allotype, female. — Bear Brook near 

 Blue Mountain Lake, New York: June 

 19, 1941, Prison & Ross. 



Neureclipsis McLachlan 



Neureclipsis McLachlan (1864, p. 30). Geno- 

 type, monobasic: Phryganea bimaculata Lin- 

 naeus. 



Of the three species known from North 

 America, two have been taken from Illinois, 

 and the third occurs to the northeast. We 

 have reared only crepusciilaris ; this larva 

 agrees very well with Ulmer's description 

 of bimaculatus, and it is possible that all 

 three species have larvae similar in color 

 and general structure. 



KEY TO SPECIES 

 Adults 



L Genitalia with a distinct aedeagus, 



figs. 222-224 (males) 2 



Genitalia without an aedeagus, figs. 

 225-227 (females) 4 



2. Base of left clasper with a large dorsal 



projection near base, fig. 222 



validus, p. 58 



Base of left clasper without a dorsal 

 projection, dorsal margin almost 

 uniformly straight from base to 

 apex, fig. 223 3 



3. Cerci represented by long, heavily 



sclerotized filaments, fig. 223; tenth 

 tergite very long. . . .bimaculatus, p. 57 

 Cerci lobelike and not heavily scle- 

 rotized, fig. 224; tenth tergite short 

 crepuscularis, p. 57 



4. Eighth sternite with a long, high mesal 



ridge, the lateral lobes long and nar- 



224 



CREPUSCULARIS 



Figs. 222-224. — Neureclipsis, male genitalia. 



