August, 1944 



Ross: Caddis Flies of Illinois 



43 



small, projecting, mesal sclerite; 

 lobes of tenth tergite conical, fig. 



154 tenebrosa, p. 43 



Internal sternal "whip" attached to 

 large, rounded plate which spans 

 almost the entire width of the seg- 

 ment, fig. 151/^ erotica, p. 44 



Protoptila maculata (Hagen) 



Beraea? maculata Hagen (1861, p. 296); cT. 

 Protoptila lloydi Mosely (1934-^, p. 151); d". 



Larva. — Length 3-4 mm. Head, legs and 

 body sclerites yellow. 



Case. — Fig. 137. Constructed of small, 

 flat stones and forming a typical saddle 

 case, complete with ventral strap. Due to 

 its small size and somewhat irregular ap- 

 pearance it is overlooked easily when col- 

 lecting. 



Adults. — Length 3-4 mm. Head and 

 body medium and light shades of brown, 

 wings dark brown with a whitish band 

 across the "cord" of the front wings. Both 

 wings long and narrow, front ones with 

 crossveins grouped to form an irregular 

 cord near middle. Male genitalia, fig. 148: 

 eighth sternite produced into a long, narrow, 

 bifid process; tenth tergite produced into a 

 divided, beaklike portion narrow at tip; 

 aedeagus with a large, ovoid, internal lobe, 

 a pair of lateral, style-bearing lobes and a 

 sinuate central portion expanded at apex ; 

 styles short, stout and sharply curved at tip. 

 Female genitalia similar to those in fig. 152, 

 with essentially the same shaped internal 

 whip and plates. 



Allotype, female. — Momence, Illinois, 

 along Kankakee River: May 29, 1939, 

 Frison & Ross. 



This species has been taken in Illinois 

 from only two points on its eastern margin, 

 in the Salt Fork River and the Kankakee 

 River. Mature pupae have been collected 

 in the Kankakee River. Adult records from 

 May to August indicate two or more gen- 

 erations per year. 



The range of the species is extensive 

 through the northeastern states, with rec- 

 ords from the District of Columbia, Illinois, 

 Indiana, Kentucky, New York and Pennsyl- 

 vania; these indicate that our Illinois rec- 

 ords are near the western limit of its range. 



Illinois Records. — Momence: Kanka- 

 kee River, May 29, 1939, Frison & Ross, 

 i i, \ mating pair; Aug. 21, 1936, Ross 

 & Burks, $ i, 2$ (reared); Kankakee 

 River, May 26, 1936, H. H. Ross, 3 6. 



Oakwood: June 14, 1935, C. O. Mohr, 



Protoptila lega Ross 



Protoptila lega Ross (1941/^, p. 48); cf , 9. 



Larva. — Not associated, but undoubtedly 

 present in material collected in the Salt 

 Fork River and not distinguished from mac- 

 ulata. 



Adults. — Similar in size, color and gen- 

 eral structure of genitalia to maculata; dif- 

 fering in the long, straight lateral styles 

 of the aedeagus and the shape of the apex 

 of the aedeagus, fig. 149. Female genitalia 

 variable in minute details, a typical condi- 

 tion shown in fig. 152, but with variations 

 occurring which are very similar to fig. 153. 



To date this species has been taken in 

 Illinois only from the upper Sangamon 

 River, Salt Fork River, Middle Fork River 

 and Embarrass River; confined to the stony 

 riffles of these relatively clear streams. Ma- 

 ture pupae, linking the larvae with the 

 adults, were collected in the Middle Fork 

 River at Danville. 



Known also from Missouri and Wiscon- 

 sin. 



Illinois Records. — Charleston: Sept. 

 8, 1931, H. H. Ross, \$, 19. Danville, 

 Middle Fork River: Aug. 27, 1936, \$, 

 19. Mahomet: Aug. 3, 1937, Ross & 

 Burks, $ $, 9 9. Oakwood: Aug. 14, 

 1935, C. O. Mohr, 5 c? , 2 9 ; June 14, 1935, 

 C. O. Mohr, 5$, 3 9. 



Protoptila palina Ross 



Protoptila palina Ross (1941.^, p. 46); d^, 9. 



This species frequently occurs in com- 

 pany with maculata and erotica. Since both 

 of these last species occur in Illinois, there 

 is a good possibility that palina will eventu- 

 ally be taken in this state also. It is known 

 from Kentucky, Pennsylvania and West 

 Virginia. 



Protoptila tenebrosa (Walker) 

 Hydroptila tenebrosa Walker ^1852, p. 134); 



This species has not yet been taken in 

 Illinois but is known from Arkansas, Mon- 

 tana, Ontario, Wisconsin and Wyoming, 

 and may eventually be found in one of the 

 colder Illinois streams. 



