218 



Illinois Natural History Survey Bulletin 



Fol. 23, Art. 1 



tawny, covered with white hair. Front wings 

 with a very conspicuous pattern, composed 

 of cross bands of brownish yellow and a 

 series of four quadrate black spots on pos- 

 terior margin near apex, as in fig. 755 ; the 

 bands are actually pigmented areas in the 

 wing membrane with hair which follows 

 this pattern closely. Male genitalia, fig. 750, 

 with structures typical for genus, the clasp- 

 ers with only a small basal projection and 

 with a pair of long styles tipped with long 

 setae arising between bases of claspers. 



Our Illinois records are confined to the 

 eastern and northern portions of the state, 

 and the species has been taken in large num- 

 bers only around the glacial lakes in the 

 northeast corner. The larva which is de- 

 scribed above as belonging to this species 

 was found abundantly in Channel Lake, 

 from which our largest collections of adults 

 were taken; it is the only Leptocella larva 

 in this entire lake region which was not 

 reared ; so we feel fairly confident in identi- 

 fying it as exquisita. Collection data indi- 

 cate a single generation per year, the Illi- 

 nois emergence ranging from late June to 

 mid July. 



This species is widely distributed through 

 the East, with an extension westward 

 through the Ozarks to Oklahoma. We have 

 records from Arkansas, Florida, Georgia, 

 Illinois, Indiana, Kentucky, Maine, Michi- 

 gan, Minnesota, Missouri, New York, 

 North Carolina, Ohio, Oklahoma, Ontario, 

 Pennsylvania, Quebec, South Carolina, Ten- 

 nessee, Vermont and Wisconsin. 



Illinois Records. — Algonquin: July 16, 

 1910, Nason, 1 <? . Antioch : July 7, 1932, 

 Frison & Metcalf, $ $. Richmond: June 

 28, 1938, Ross & Burks, 3 $ ; June 29, 1938, 

 Ross & Burks, 4^. Wilmington: July 1, 

 1935, DeLong & Ross, 1^, 4$. York- 

 viLLE, Fox River: June 25, 1936, at light, 

 Frison & DeLong, S $ , 8 9. 



Leptocella pavida (Hagen) 



Setodes pavida Hagen (1861, p. 282); 9. 



Larva. — Length 7 mm. Head with a defi- 

 nite pattern of brownish yellow and dark 

 brown, pronotum mostly brown with yel- 

 lowish marks, as in fig. 747 ; legs yellowish 

 with a few dark marks near the joints. 



Case. — Length 9 mm. Constructed of 

 leaf fragments and forming a slightly flat- 

 tened capsule. 



Adults. — Length 10 mm. Color very 

 pale yellow, including both the front wing 

 membrane and the hairs on the wing; front 

 wing, in addition, with a scattering of small 

 and very black dots over most of the sur- 

 face, many of the dots arranged in rows but 

 all of them well separated, fig. 756. Male 

 genitalia, fig. 749 : general structure typical 

 for genus as regards most of the structures; 

 diagnostic are the claspers, which have a 

 basal flap, and the large scoop-shaped scle- 

 rite beneath the base of the claspers and 

 extending to the end of the basal lobe of 

 the claspers. 



In Illinois this species is a rarity. We 

 have taken only four specimens, three of 

 them in the center of the state, and one 

 in the southern tip. We have not found 

 any larvae. A collection of larvae and pupae 

 made at Poe Springs, Alachua County, 

 Florida, April 15, 1935, J. S. Rogers, has 

 given us the association of larvae and adults. 



The range of the species includes the 

 eastern states with extensions westward 

 through the Ozarks into Oklahoma. Rec- 

 ords are available from Arkansas, District 

 of Columbia, Florida, Georgia, Illinois, Ken- 

 tucky, Maryland, Massachusetts, Michigan, 

 Missouri, New York, Oklahoma, Tennessee 

 and Wisconsin. 



Illinois Records. — Herod: Aug. 16, 

 1937, at light, Ross & Ritcher, 1 $ . Ma- 

 homet: Aug. 3, 1937, Ross & Burks, 2$. 

 MoNTiCELLO: June, 1932, T. H. Frison, 

 \$. 



Leptocella diarina new species 



Larva. — Length 11 mm. Head and tho- 

 racic sclerites yellow with a pair of black 

 lines running the full length of head and 

 pronotum and frequently indicated on the 

 mesonotum, fig. 745. Legs various shades 

 of brown, hind legs ^vith a swimming brush 

 of long hair. 



Case. — Length 20 mm. Made from wood 

 fragments or sand grains, usually with a 

 long stick attached to the side and with 

 wood fragments predominating in the con- 

 struction. 



Male. — Length 14 mm. Head and body 

 straw colored, the legs whitish, all covered 

 with white hair. Antennae banded with 

 black and white hair. Wings with mem- 

 brane transparent, color pattern formed en- 

 tirely of hair; color nearly white with light 

 brown spots arranged in rows across the 



