284 



MR. B. F. CUMMINGS ON LICE 



Parameres: Of the appendages at the base, of the plate, 1 take 

 the outside ones to be endomeral and the two elongate inner 

 ones paramei^es. The homologies of the other parts figured I do 

 not indicate, pending further dissections. 



Text-figure 17. 



JSutricJiophihts setosus. Male copulntoiy apparatus. X 182. 



BF. Basal plate ; JS. endomerial cliitinisations; P. parameres; 

 ?. problematical parts. 



Comparison with the Male Co'pulatory Apparatus of 

 E. coendu Stobbe. 



This is of exactly the same type. Basal plate ; Much broader 

 in relation to its length than that of U. setosus, and much 

 broader at the base. Between the two lateral margins at the 

 base lies the same little chitinous piece as in the preceding 

 species, only it is larger and stretches right across the plate,, 

 almost from one margin to the other, narrowing at each end ; 

 in the middle, pointing upwards and backwards from the hind 

 margin, is a small sharp-pointed pi-ocess. The two inner appen- 

 dages are narrow, and twice as long as the outer ones. These, 

 probably the endomei'es, are very short, bi-oad, stunted pieces,, 

 articulating with the basal plate. 



