166 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



base, tapering dorsally to a narrow apex 

 divided into two sharp points and bearing 

 a bladelike apical segment which extends 

 between and beyond these two points. Fe- 

 male genitalia, fig. 582, with ninth sternite 

 constricted at apex and then expanded into 

 a wide, semimembranous orbicular lobe. 



Dr. Betten (1934) has recorded this spe- 

 cies in an insect drift along Lake Michigan 

 at Lake Forest, Illinois. This catch was 

 made by Professor Needham on August 12, 

 and constitutes the only known record for 

 the state. The species was reared by Elkins 

 (1936) from Minnesota. 



The range of the species is widespread 

 through the northern states and Canada 

 from Alaska to Quebec, with records avail- 

 able for Alaska, Colorado, Illinois, Mani- 

 toba, Michigan, Minnesota, Quebec, Sas- 

 katchewan and Wisconsin. 



Agrypnia vestita (Walker) 



Neuronia vestita Walker (1852, p. 10); cf , 9. 

 Neuronia commixta Walker (1852, p. 10); c?. 



Larva. — Fig. 564. Length 25 mm. Head, 

 pronotum and legs yellow; head with a pair 

 of black lines following the boundaries of 

 the frons and with another short, black line 

 on the lateral margin; pronotum with an- 

 terior and posterior margins black, without 

 diagonal marks. 



Case. — About 45 mm. long, slender and 

 of spiral construction. 



Adults. — Length 18-22 mm. Color brown 

 with dense, matted hair on most of the 

 body; front wings variegated brown, the 

 posterior and apical margins with grayish 

 cream-colored areas which form a sinuate 

 pattern when the wings are folded; hind 

 wings clear with an apical dark brown mar- 

 gin. Tibiae with long, pale spines which 

 stand out conspicuously and give the legs a 

 tawny appearance. Male genitalia, fig. 581, 

 similar in general structure to straminea, 

 differing chiefly in the long, sharp, mesal 

 projection of the base of the clasper. Fe- 

 male genitalia, fig. 583, with the orbicular 

 lobe of the ninth sternite larger and stouter 

 than in straminea. 



This species has frequently been placed 

 in Phryganea or Dasystegia. 



In our recent collections we have found 

 this species confined in Illinois to the lakes 

 and marshes of the northeastern corner of 

 the state. We have, however, a single early 

 record (1894) from Havana, near the center 



of the state. The species was recorded from 

 Lake Forest and Diamond Lake, Illinois, by 

 Betten (1934). We have reared the larvae 

 from the Dead River at Zion, Illinois, 

 where the cases were found in abundance 

 in mats of aquatic smartweed and other 

 plants. Adult records extend from May to 

 mid August and indicate the possibility of 

 more than one generation per year; our own 

 records are confined chiefly to May and 

 June, so that undoubtedly the greatest wave 

 of adult emergence occurs at this time. 



The range of the species includes most of 

 the Northeast and East; records are known 

 for the District of Columbia, Georgia, Illi- 

 nois, Indiana, Massachusetts, New York 

 and Ohio. 



Illinois Records. — Algonquin: June 9, 

 1909, 1 $ ; June 11, 1910, at light, 1 ? ; June 

 20, 1910, at light, 19. Chicago: June 17, 

 W. J. Gerhard, 1^, fm. Havana: 1894, 

 1$. Northern Illinois: 1$; Aug. 13, 

 1898, 1 9. Palos Park: July 4, 1905, W. 

 J. Gerhard, 1 9 , fm. Pistakee Lake: May 

 28, 1936, H. H. Ross, 19. Sand Lake: 

 June 15, 1892, Hart & Shiga, 1 9 . Willow 

 Springs: June 26, 1910, W. J. Gerhard, 

 1 9 , FM. ZiON, Dead River: May 28, 1938, 

 Mohr & Burks, 1 ^ , 1 reared pupa and 

 larval parts; May 20, 1940, Mohr & Burks, 

 9 larvae ; June 6, 1940, Mohr & Burks, 2 9 , 

 4 pupae, 2 larvae; June 16, 1940, Mohr & 

 Burks, \$, 19, 7 larvae (reared). 



Fabria Milne 



Fabria Milne (1934, p. 9). Genotype, by 

 original designation: Neuronia inornata Banks. 



This genus is readily distinguished in the 

 female by the extremely broad ninth ster- 

 nite. The male is distinguished by the com- 

 bination of drab color and genitalia, as out- 

 lined in the key. 



One of the two North American species 

 has been taken in Illinois. 



Fabria inornata (Banks) 

 Neuronia inornata Banks (1907^, p. 117); 



Larva. — See following genus. 



Adults. — Length 20-24 mm. Color light 

 brown, the wings with a very fine reticula- 

 tion of slightly darker brown marks. Front 

 wings with R^ very sinuate at apex, hind 

 wings with R^^ also sinuate. Male genitalia, 



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