116 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



the middle of the summer it is not unusual 

 to encounter large flights of these beauti- 

 fully colored insects. 



The range includes most of eastern North 

 America, with records available from Con- 



necticut, Georgia, Illinois, Indiana, Ken- 

 tucky, Maine, Michigan, Minnesota, New 

 York, Ohio, Ontario, Pennsylvania, Vir- 

 ginia, West Virginia, Wisconsin; in addition 

 we have an isolated record from Utah. 



Illinois Records. — Many males and fe- 

 males, collected May 22 to September 7, 

 and many larvae, collected April 27 to Oc- 

 tober 28, are from Algonquin, Antioch, 



Fig. 421. — Macronemum zebratum cT, genitalia. 



Aurora, Como (Rock River), Dixon (Rock 

 River), Hamilton, Kankakee (Kankakee 

 River), Momence (Kankakee River), Nor- 

 mal, Oregon, Quincy (Mississippi River), 

 Rockford, Rock Island, Sterling (Rock Riv- 

 er), Wilmington (Kankakee River). 



Macronemum Carolina (Banks) 



Macronema Carolina Banks (1909, p. 342); 



Fig. 420. — Macronemum zebratum cf . 



d^. 



The genitalia appear identical with zebra- 

 tum, but Carolina is always smaller, 12-13 

 mm., has a slightly darker pattern, and has 

 much larger eyes, resulting in a narrower 

 malar space. The larvae, reared at Shoals, 

 Indiana, are remarkably similar to those of 

 zebratum, but the differences between them 

 are very critical. It is advisable to use com- 

 parison material to aid identification. 



Allotype, female. — Swainsboro, Georgia, 

 along Ohoopee River: May 31, 1931, P. W. 

 Fattig. 



We have taken only a single specimen 

 in Illinois, a female collected at light in 

 Fox Ridge State Park, near the Embarrass 

 River, July 9, 1944, Sommerman & Ross. 



The species is fairly widely distributed 

 through the southern states, and records 

 are available from Florida, Georgia, Indi- 

 ana, Louisiana, New York, Oklahoma, 

 Pennsylvania and South Carolina. 



