36 Lake Maxinkuckee, Physical and Biological Survey 



stayed. The tubes varied greatly in size and were probably built 

 up of the excreta of the wrigglers. These wrigglers would some- 

 times leave their tubes and swim about near the surface, and fed 

 greedily upon Spirogyra which was put in the dish. Chironomus 

 larvaB were observed to be abundant throughout the lake during 

 the winter. They were easily obtained by dredging. They were 

 either naked or enclosed in gray mud cases. When naked their 

 bright colors made them very conspicuous. Some that were placed 

 in a jar with some sticklebacks proved very attractive to the latter 

 which snapped them up greedily. Some naked larvae placed in a 

 tumbler of dirty water ever night encased themselves. 



Another group of dipterous insects of importance is that of the 

 mosquitoes. Fortunately for the summer cottagers, however, mos- 

 quitoes rarely appear in sufficient numbers about the lake to be 

 much of a pest. While there are several marshy tracts near the 

 lake which furnish favorable breeding grounds for mosquitoes, 

 they are, in most instances, sufficiently remote from the cottages, 

 or else the winds are favorable for keeping them away. They are, 

 of course, more common in some seasons than in others. Our notes 

 speak of them as common in certain places November 2, 1902 and 

 1903, July 3, 1904, September 12, 1907, and September 2, 1913. 

 They are said to have been rather bad during the summer of 1913. 

 Unfortunately, very little attention was given to preserving speci- 

 mens of the various species of insects and our collection contains 

 but three species of mosquitoes, viz : Anopheles quadrimaculata, 

 Culex stimulans and Culex excrucians. Doubtless others occur. 



Corethra larvas are common in the lake, descending into the 

 deeper waters; they are also common in the woodland ponds. 



Following is a list of the species of Diptera represented in our 

 collections from Lake Maxinkuckee: 



Psorophora ciiiata Fabr. 



Anopheles quadrimaculata Say 



Culex stimulans Walk. 



Culex excrucians Walk. 



T any pus monilis Linn. 



Calliphora erythrocephala Meig; larvae. 



Chironomus meridionalis Johan. 



Chironomus decorus Johan. 



Chironomus cayugse Johan. 



Tipulid, probably the genus Tipula. 



Tanytarsus dives. 



Ablabcsmyia monilis Linn. 



