651 



MR. B. F. CUMMINGS ON LICE 



In the same genvis should be included Docophorus Irunneo- 

 pygiis Mjoberg (6, p. 130) on Anser levcojisis, which I do not 

 know, 



A, difficilis, sp, n., closely resembles A. femigineus in form, 

 with the one considerable difference that the "tin-opener" is 

 absent. 



Text-fioure 7. 



A. Anatoecusferrvghieiis, $. B. A. icterodes, $. X 80. 

 Compare the signatures. 



Text-fioure 8. 



A. Anatoecits ohtnsits, J. B. A. hrnnneiceps, S • X 80. 

 Compare the signatures. 



Text-figs. 7, 8, & 9 illustrate the form of the head in these 

 species, and the table presents a comparison of the head-measure- 

 ments (millimetre scale). In the table the measurements taken 

 are from the posterior apex of the signature to the anterior 

 margin, and ti'ansversely from one lateral margin to the other 

 at the level of the base of the cljpeal bands, together with the 

 total length and the greatest breadth. 



