Occasional Papers of the Museum of Zoology 23 



Leptostyla clitoricc Heid. One specimen was swept from 

 herbage at the foot of a low dune at New Bufifalo, September 

 3. The occurrence of this "southern" species here is a matter 

 of considerable interest. 



Corythucha marmorata Uhler. By far the most abundant 

 Tingid in Michigan. In some places in Berrien County this 

 species occured in almost unbelievable numbers on the golden- 

 rods, but it was rarely taken on other plants. 



Corythucha arcnata (Say). Common on the white oaks 

 (Quercus alba) on the dunes, and found occasionally on the 

 chestnut oak (Q. miihlenbergii) . 



Corythucha ciliata (Say). Common on the sycamores in 

 the Warren Woods area, but rather scarce on this tree where 

 it occurred beside the dune creeks. This Tingid was most 

 abundant late in the summer: in early July, though nymphs 

 were numerous, adults were rather scarce. 



Corythucha pruni O. & D. A few individuals were taken 

 from a Primus serotina beside a dune creek west of Bridg- 

 man, July 25. 



Corythucha pergandei Heid. Fairly common on Alnus 

 incana beside the dune creek near Bridgman, July 25. 



Corythucha mollicula O. & D. (= C. salicis O. & D.), 

 Abundant on a single species of willow which grew rather 

 commonly beside Bridgman Creek in the dune region. July 

 17 to 28. 



Corythucha sp. Generally distributed over the dunes, 

 occurring on the blue beech {Carpinus caroliniana) . This 

 species is much less gregarious than the other Corythuchse 

 found on the dunes : rarely are there more than half a dozen 

 specimens found on a single branch, or more than one indi- 

 vidual on a leaf. 



Corythucha sp. A second species which cannot be named 



