680 



MR. B. F. CUMMINGS ON LICE 



penis. They are slender and wedge-shaped, rather long. The 

 penis is a long, narrow, elongate rod, with a somewhat swollen 

 base, which lies almost buried between the dorsal and the ventral 

 median processes of the basal plate. 



Text-figure 25, 



TB 



Pen 



Struthiolipeurus asymmetricus. Male copulatorj' apparatus. X 140. 



BF. basal plate. MK. median keel. TB. transverse band. MP. median piece. 

 Fen, penis. LIS. lower endoniere. F. paramere. TIE. upper endomere. 



The Rest of the Lipeuri. 

 LiPEURUs SUBSIGNATUS Giebel (5, p. 232). 



Several specimens, including a male, from PJioenicopterus roseus 

 Pall. 



LiPEURUs JEJUNUS Nitzsch (5, p. 240). (Text-fig. 26.) 

 Males, females, and larva; from Branta leucopsis (Bechst.). 

 Male Reproductive System. — This was cai-efully figured and 

 described by Kramer as long ago as 1869 in the ' Zeitschrift fiir 

 wissenschaftliche Zoologie ' (12). Testes and vas deferens as 

 usual. The vesicula semincdis is an elongate double-chambered 

 sac, the median partition indicated externally by a longitudinal 

 groove. 



