new Species of Lice, 107 



V-sliaped {V., fig. 7) groove nimiing in transversely from the 

 ciittiiig-edge. The right maudible iias two apices. At tlie 

 base tlie lower of tliese two apical teeth is tran.sversely ribbed^ 

 tills ribbed surface working against a surface similarly ribbed 

 on the lower side (and theiefore not visible in the figure) of 

 the first apical tooth of the opp!)site mandible. 



First lilaxillae. — Soft lobes, longer than broad, with a 

 small piece of thicker chitin on tlie outer margin as a support. 



Labium. — The so-called paraglossa-, columnar, straight, 

 are rather long with soft, rounded, distal ends. On tlie 

 inner surface at the tip, four or five spines nearly as long as 

 the lobe itself and all pointing inwards. Between these two 

 appendages, the anterior margin of the labiuui runs out into 

 two suiall round prominences, each possessing a few small 

 spines. 



Isopogometric Apparatus. — CEsophageal sclerite very 

 rounded, a little broader than long. JN'o posterior cornua. 

 Anterior cornua thinly chitinizod, short, rather broad, and 

 invisible without dissection. 



j\leasurcments {inillimetrc-scah) . 



Liiiognathuides ciielli, sp. n. 



In the ' Bulletin for Entomological Research ' (vol. v. 

 pt. 2, Sept. 1914, p. 160) I described a new species of 

 Anoplura from a 8ciurid, CiteUus leptudactylus, under the 

 name Linognathoides sperniophili. Mr. Launcelot Harrison, 

 B.lSc, has kindly pointed out that this name has already 

 been used by Giube under a figure of Linognathus Icevi- 

 usculus (Grube) in Middendorff's ' Sibirischer Reise gesamm. 

 Parasiten Zool.,' vol. ii. p. 498, t. ii. fig. 3 (1851). I there- 

 fore rename Linognathoides spermojjhili as Linognathoides 

 citelli. 



