256 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



July 1, 1931, Frison, Betten & Ross, 1$ ; 

 June 30, 1935, DeLong & Ross, 1 9 ; May 

 15, 1936, Ross & Mohr, 1 larva; May 28, 

 1936, H. H. Ross, 1 <? , 2 $ . 



Setodes Rambur 



Setodes Rambur (1842, p. 515). Genotype, 

 by subsequent designation of Milne (1934, p. 

 18): Setodes punctella Rambur. 



This genus contains six or seven species, 

 all of them rare, of which we have taken 

 only one in Illinois. An additional species, 

 incerta, will likely be found in the state 

 with subsequent collecting. 



No Nearctic larvae of this genus have 

 been reared, but Miss Thelma Howell 

 collected a leptocerid larva in Swain County, 

 North Carolina, which may belong to this 

 genus. It is characterized by a rectangular 

 gula, mandibles with a broad dentate apex, 

 filamentous abdominal gills which are single 

 or double, and the curious anal plate shown 

 in fig. 719. 



Setodes oligia (Ross) 



Leptocerus oligius Ross (1938^, p. 160); cf, 

 9. 



Larva. — Unknown. 



Adults. — Length 8 mm. Color almost 



id" Genitalia 



Fig. 871. — Setodes oligia^ genitalia. 



Fig. 872, — Setodes incerta, male genitalia. 



cream, some sutures and veins light brown 

 but without definite pattern. Male geni- 

 talia, fig. 871 : tenth tergite forming a long, 

 rectangular projection divided at apex into 

 a pair of long slender filaments; claspers 

 divided into a finger-like dorsal lobe and 

 truncate ventral lobe ; aedeagus cylindrical 

 and curved; at its base originate a pair of 

 long, slender sclerotized filaments. Female 

 genitalia, fig. 871 : tenth tergite hood shaped, 

 ninth with a pair of handlike lobes and with 

 extensive internal structures. 



The genitalia of the male are radically 

 different from those of incerta, fig. 872, the 

 only other species of the genus which has 

 been taken near Illinois. 



Our Illinois collection of this species con- 

 sists of a single record of one male and three 

 females taken along the Kankakee River at 

 Wilmington, August 20, 1934, DeLong & 

 Ross. The species was described from this 

 series of specimens. In addition, we have 

 records from Michigan and Ontario. 



GOERIDAE 



This family is represented in North 

 America by the genera Goera, Pseudogoera 

 and Goerita, all occurring in the eastern 

 states. None of these have been reared in 

 North America, and our knowledge of the 

 immature stages is based chiefly on the de- 

 scriptions of the immature stages of Goera 

 by European writers. The case resembles 

 that of Neophylax autum:ius (p. 203). The 

 adults have the maxillary palpi three seg- 

 mented in the male, five in the female. 



KEY TO GENERA 



Adults 



1. Front wings with venation reduced, 

 R4-f-6 partially fused with M; 2A and 



3A absent, fig. 873. . . 



Pseudogoera, p. 258 



