234 MALLOPHAGA. 



comes cold the lice will leave the host and wander about for some time 

 before death. This habit has led to some inaccm-acy in records, as the 

 straggling lice are taken from birds which they normally never inhabit. 

 This is especially true when a number of birds are placed in a hunting 

 bag together. The accuracy of the records of the present collection 

 has been marred b}' several such cases of undoubted straggling. The 

 birds should be examined at once, if possible, or bagged in light, tight 

 paper bags, or TkTapped in such a way as to preclude straggling. 



The best method of removing the lice from the feathers is by means 

 of a camels hair brush dipped in xylol. But here again care is neces- 

 sary, for the lice on being touched with the fluid often bite the brush 

 and are hard to remove. Small lice may easily be overlooked and 

 finally removed along with the specimens from another bird. Great 

 care should be taken to remove every specimen from the brush before 

 using it on other birds. 



The specimens should be put into xylol immediately on removal, if 

 the lice are to be mounted at once, and in a few hours they can be placed 

 on slides with Canada balsam. If they are not to be mounted at once 

 it is better to put them into 95% alcohol until thev can be mounted. 



In my own collecting the birds are taken alive, if possible, and held 

 on a table covered with white paper. Very small quantities of xylol 

 are introduced among the feathers, and the odor causes the lice to come 

 out to the surface or crawl off upon the paper where they are readily 

 seen, even if quite small. In this way I have been able to find speci- 

 mens on birds where I had not been able to discover them by the most 

 careful visual examination. 



THE HURON COUNTY COLLt^CTION. 



The specimens of Mallophaga on which the present report is based, 

 the first important collection of material in this order from Michigan, 

 were taken from the birds secured by the members of the biological 

 expedition sent to the sand region along the south shore of Saginaw 

 Bay (Huron County), by the Michigan Geological and Biological Sur- 

 vey, in the summer of 1908. 



The collectioh was examined by Mr. M. A. Carriker, Jr., during his 

 brief stay in Boston, Mass., just preceding his departm-e for South Amer- 

 ica on a long collecting trip, and I am much indebted to him for the 

 identification of the species, as well as for valuable notes concerning 

 some of them. The twenty-nine different species taken on this survey 

 represent seven of the twenty-three known genera, distributed as fol- 

 lows: — eight belong to the genus Docophorus, seven to the genus A^ir- 

 mus, six to the genus Colpocephahmi, two to the genus Trinoton, one 

 to the genus Laemohothrium, one to the genus Nitzschia, and four to 



