230 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



late hrown. the base of the tarsi ringed 

 with white. IVIale genitalia, fig. 781: cerci 

 short; tenth tergite fairly long, slightly 

 curved, fairly thick at apex, and with a pair 

 of stout, sclerotized lateral arms which 

 arise at the extreme base of the tergite and 

 nearly reach the tip; claspers with long, 

 pointed basal projection, curved apical seg- 

 ment and a stout, curved mesal projection. 

 Female genitalia, fig. 793: ninth sternite 

 with a pair of finger-like, apico-mesal lobes; 

 bursa copulatrix with lateral bands flat to 

 point of attachment; a large sclerite almost 

 fills the space between the bursa and the 

 dorsal apodeme of the tenth tergite. 



Allotype, female. — Spring Grove, Illi- 

 nois, reared from hatchery ponds: June 14, 

 1938, B. D. Burks. 



This species has been taken at only a 

 few localities in the northern part of the 

 state. It is apparently single brooded, our 

 emergence records being from June 14 to 

 July 20. We have taken the larvae only 

 in fish hatchery ponds at Spring Grove 

 where they were very abundant. It is 

 interesting to note that only a few miles 

 away the somewhat similar larvae of closely 

 related tarsi-punctatus were abundant in 

 Pox Lake, but we experienced no difficulty 

 in separating the two on comparative color- 

 ation and case construction, nor did the two 

 appear to mix in either habitat. 



Records for this species are scattered but 

 restricted to the northeastern states, as fol- 

 lows: Illinois, Michigan, Minnesota, New 

 York and Wisconsin. 



Illinois Records. — Many males and fe- 

 males, taken June 14 to August 15, and 

 many larvae, taken June 9 to 14, are from 

 Antioch, Fox Lake, Fulton, Homer, Mc- 

 Henry, Momence, Richmond, Spring Grove, 

 Waukegan, Wadsworth (Des Plaines Riv- 

 er). 



Athripsodes nephus new species 



Larva. — Unknown. 



Male. — Length 10 mm. Color various 

 shades of brown, the wings an almost uni- 

 form shade and without white scales, the 

 tarsi banded with light and dark. General 

 structure typical for genus. Male genitalia, 

 fig. 779: ninth segment fairly narrow and 

 cylindrical, the dorsal portion projecting 

 over the base of the tenth. Tenth tergite 

 long and narrow, the central portion nar- 

 rowed, the apex expanded into a definite 



head; at the base of the tenth tergite arise 

 a pair of sclerotized rods which are sharply 

 curved at the middle and reach to the middle 

 of the tenth tergite. Claspers stocky; basal 

 segment short with a ventral pointed pro- 

 jection; apical segment stout and curved at 

 middle, membranous and bearing long scat- 

 tered setae; mesal process fairly slender and 

 about half the length of the apical segment. 

 Aedeagus ovate, the lateral sclerites deep, 

 the internal sclerotized pair of rods short, 

 wide at base, and sharply angled dorsad 

 at apex. 



Holotype, male. — Rosecrans, Illinois, 

 along Des Plaines River: June 9, 1938, at 

 light, Ross & Burks. 



Paratypes. — Illinois. — Same data as for 

 holotype, 1 $ . 



Oklahoma. — Cloudy Creek near 

 Cloudy: May 4, 1940, Mrs. Roy Weddle, 

 \$. 



The species differs from all the previously 

 described members of the tarsi-punctatus 

 group in the short, sclerotized rod which 

 arises from the base of the tenth tergite, 

 the angled internal rod of the aedeagus, and 

 also in the shape of the tenth tergite, notably 

 the constricted central portion and expanded 

 apex. 



This is a very rare species in Illinois 

 known only from the male and with nothing 

 known regarding its biology. Probably 

 locally distributed over a wide range. 



Athripsodes resurgens (Walker) 



c^. 



Leptocerus resurgens Walker (1852, p. 70); 



Leptocerus variegatus Hagen (1861, p. 278); 



Leptocerus aspinosus Betten (1934, p. 255); 



Larva. — Unknown. 



Adults. — Length 16 mm. Color grayish 

 brown, the wings and body with a scattering 

 of fairly large areas of white hair giving 

 it a variegated and somewhat hairy appear- 

 ance. Male genitalia, fig. 785: cerci short 

 and rounded; tenth tergite elongate and up- 

 turned; claspers with a short, dark basal 

 projection, very long basal segment, short 

 and curved apical segment, and a mesal 

 process which is straight and stout and 

 usually extends slightly above the level of 

 the apical segment. Female genitalia, fig. 

 800: ninth sternite only slightly sclerotized; 

 bursa copulatrix with wide lateral exten- 



