August, 1944 



Ross: Caddis Flies of Illinois 



255 



larva. Chicago: July 30, 1904, 1^, fm ; 

 Aug. 4, 4$ , 1 9 , FM. Fox Lake: May 28, 

 1936, H. H. Ross, U, 29. Lake Villa: 

 July 21, 1916, 19. 



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lill: 







m 



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f.mo V\ f' 



Fig. 870. — Mystacides sepulchralis cf, me- 

 tallic blue-black in color. This species is 

 common in eastern states. 



Mystacides longicornis (Linnaeus) 



Phryganea longicornis Linnaeus (1758, p. 

 548). 



Phryganea qiiadrijasciata Fabricius (1775, 

 p. 308). 



Oecetina interjecta Banks (1914, p. 262); 9. 



Mystacides canadensis Banks (1924, p. 448); 

 &. 



Larva. — Fig. 864. Length 10 mm. Head 

 yellowish with a few spots and a large black 

 Y following the epicranial stem and arms; 

 pronotum varying from yellowish with a 

 paired mesal black mark to almost entirely 

 black with a light area in the middle of each 

 lateral half; legs pale with narrow dark 

 bands. 



Adults. — Length 9 mm. Color rusty 

 brown, the front wings frequently clothed 

 with golden hair arranged to form alternate 

 golden and brown bands; in rubbed speci- 

 mens this banding never shows. Male geni- 

 talia, fig. 867, with apical process of ninth 

 sternite long, narrow and only slightly in- 

 cised at apex. Female genitalia as in fig. 

 869. 



In Illinois we have taken this species only 

 in company with the preceding species in 

 glacial lakes of the northeastern part of the 

 state (see p. 11). Betten's record (1934, 

 p. 279) from Diamond Lake, Illinois, May 

 30, is in the same region. Larvae were 

 collected and reared from Channel Lake. 

 We found larvae of both species side by 

 side making identical cases. Available rec- 

 ords indicate an adult emergence through- 

 out the warmer months of the year. 



The range of the species is apparently 

 much wider from east to west through the 

 northern states than that of sepulchralis, 

 but it does not extend as far south. We 

 have records from Colorado, Illinois, Mich- 

 igan, New York, Ontario, Pennsylvania, 

 Quebec, Saskatchewan and Wisconsin; it is 

 recorded from many localities in Eurasia. 



Illinois Records. — Antioch: July 7, 

 1932, at light in town, Frison & Metcalf, 

 2$ ; May 18, 1938, Ross & Burks, 1 larva, 

 \$ (reared). Channel Lake: May 27, 

 1936, H. H. Ross, 2 i pupae; June 11, 

 1936, Burks & Ross, 35. Fourth Lake: 

 Aug. 9, 1887, C. A. Hart, 1 $ . Fox Lake: 



