Vol. XXvii] ENTOMOLOGICAL NEWS. I99 



these, and from the iUustrations of others, that the number of 

 rows of hairs on the segments of the abdomen is hardly a suit- 

 able character upon which to split up this genus, in fact the 

 knowledge of the genus is at present so slight that any attempt 

 to divide it is likely to lead only to confusion. The new genus 

 liaving been established, however, may be retained. 



In his description of the new genus and species, Mjoberg 

 compared them with Solcnopotcs capillatus Enderlein, a genus 

 and species from Bos taunts, which were obviously based upon 

 immature specimens. I have at hand an immature specimen 

 of Linognathus vituli L., which in general appearance and in 

 the chaetotaxy of head and abdomen agrees very closely with 

 the description and figure of S. capillatus. The shape of the 

 head does not agree, but immature specimens are very liable 

 to distortion and are not to be too closely depended upon. The 

 abdominal spiracles do not protrude, as they are supposed to 

 do in Solenopotcs, but they are disproportionately large and it 

 is worthy of note that the figure of L. vituli given by Giebel in 

 Jnsecta Epi^^oa indicates the abdominal spiracles as protruding. 

 Taking all these things into consideration, I am forced to re- 

 gard Solenopotcs as a synonym of Linognathus, and 5". capil- 

 latus as a synonym of L. vituli. 



Satisfactory progress in the study of the Anoplura depends 

 at present very largely upon the satisfactory fixing of the 

 status of certain species which were described before the neces- 

 sity for careful and full descriptions and accurate figures was 

 fully realized, and I therefore take this opportunity to present 

 a description and figures of Ccrvophthirius crassicornis. 



The description follows. The only fully mature female 

 available is not in satisfactory condition for measurement and 

 this is consequently omitted. 



Head about twice as long as wide. Anterior margin very roundly 

 convex. Temporal angles moderately prominent, temporal margins 

 nearly straight and parallel. Posterior-lateral angles sharp and promi- 

 nent. Occiput much produced into the thorax. Extending across the 

 head in front of the antennae is a conspicuous, curved, chitirtized area 

 and along each temporal margin is a narrow chitinized area. Chaeto- 



