182 



W. D. FUNKHOUSER 



collections from parts of the district have yielded such distinct floral 



specimens that it seems probable that new species of Membracidae may be 



found there on further search. 



Naturally a number of problems remain unsolved. These can be 



worked out only by experiments and observations extending over a series 



of years. It is hoped that the present report may suggest such problems 



and stimulate an interest in their solution. 



Acknowledgment is made to Professors O. A. Johannsen, W. A. Riley, 



and J. C. Bradley, of the Department of Entomology at Cornell Uni- 

 versity, under whose direction the 

 work has been done and whose kindly 

 criticisms and suggestions have been 

 most appreciated. 



GEOGRAPHY AND PHYSIOGRAPHY 

 THE CAYUGA LAKE BASIN 



OF 



Fig. 34. cross section of catuga lake 



Cayuga Lake is the largest of the five 

 so-called "Finger Lakes" of central 

 New York. It is about forty miles in 

 length and varies from one and one- 

 half to three miles in width. The 

 average depth is approximately four 

 hundred feet, and the banks slope 

 sharply to the center in a pronounced 

 V (fig. 34) . On either side of the lake 

 the hills rise to an average height 

 of from four hundred to six hundred feet, continuing the V, as seen in 

 the figure, about as high above the water line as the distance below it. 

 These hills are cut by narrow gorges thru which flow small streains with 

 very picturesque falls and rapids. The surface of the lake is about three 

 hundred and eighty-five feet above sea level, the bottom therefore being 

 lower than sea level at mean tide. 



A number of small tributaries flow into the lake near its head (fig. 35). 

 The most important of these are: Cayuga Inlet (the old Negusena Creek), 

 extending almost directly southward; Six Mile Creek, extending south- 

 eastward; Cascadilla Creek, extending due eastward; Fall Creek, extend- 

 ing northeastward from the head of the lake; Taugharmock Creek, on the 



