198 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



wings a darker bown with small, light dots 

 scattered over the entire surface to give it 

 a peppered look. Face with genae produced 

 into sharp points. Male genitalia, fig. 685, 

 with the claspers pointed at apex, the aedea- 

 gus with its extreme tip forming a pair of 

 somewhat triangular lobes having a dorsal 

 membranous fold. Female genitalia, fig. 

 688, with ninth and tenth tergites fused 

 and with the ninth sternite bearing an in- 

 ternal, rectangular, sclerotized plate ventrad 

 of the bursa copulatrix. 



Allotype, female. — Columbia Cross- 

 roads, Pennsylvania: July 7, 1931, R. M. 

 Leonard. 



Our only Illinois record of this species 

 is a female collected at Champaign, October 

 6, 1938, C. O. Mohr. Dr. Mohr captured 

 this specimen in the grass and weeds at the 

 edge of a small stream which forms the 

 headwaters of the Embarrass River. 



The species is widespread through the 



PUNCTATI55IMU5 



688A 



Figs. 686-688. — Caborius, female genitalia. 

 A, ventral aspect; B, dorsal aspect. 



Northeast; definite records are available 

 from Illinois, Indiana, Maryland, Michigan, 

 New York, Nova Scotia and Ohio. 



Caborius lyratus Ross 



Carborius lyratus Ross (1938^, p. 163); d^. 



Adults. — Length 16-18 mm. In color 

 similar to punctatissimus, yellowish brown, 

 the front wings darker brown with small 

 light dots scattered over the entire surface. 

 Face with genae not unusually produced. 

 Male genitalia, fig. 684, with the claspers 

 rounded at apex, the aedeagus with its ex- 

 treme tip forming a divided, lyre-shaped 

 fork without any dorsal membranous fold. 

 Female genitalia, fig. 687, with ninth and 

 tenth tergites fused and with the ninth ster- 

 nite bearing an internal, semicircular, semi- 

 sclerotized plate ventrad of the bursa copu- 

 latrix. 



Allotype, female. — Oakwood, Illinois: 

 Sept. 20, 1935, DeLong & Ross (this is the 

 same data as for the holotype). 



In Illinois this species has been taken only 

 at Oakwood, the collection comprising the 

 holotype and allotype, both bearing the data 

 given above. Caborius larvae were collected 

 in a small tributary of the Salt Fork near 

 the point at which the adults were taken 

 at lights. These larvae were not relocated 

 in the fall after they had gone into aesti- 

 vation and the stream had dried up. The 

 range of the species is very poorly known, 

 the only available records being from Illi- 

 nois, Pennsylvania and Wisconsin. 



Caborius kaskaskia new species 



Female. — Length 16 mm. Color light 

 brown, the front wing slightly darker brown 

 with small light dots scattered over the en- 

 tire surface of the wing. General structure 

 typical for the genus. Genitalia, fig. 686: 

 subgenital plate with three processes, the 

 lateral ones wide at base and tapering to a 

 rounded apex ; ninth and tenth segments 

 separated on the dorsum by a sharp declivi- 

 ty; ninth segment with the apical portion 

 divided from the base by a furrow; bursa 

 copulatrix without a plate ventrad of it. 



Holotype, female. — New Memphis, Illi- 

 nois, along Kaskaskia River: Sept. 25, 1939, 

 Frison & Ross. 



Paratype. — Same data as for holotype, 

 15. 



