new Species of Lice. 



09 



where the teiulon of the hirgc extensor iiinscle la inserted. 

 The inner third of the base of the mamlihle is a short 

 rectano^nh^r projection. There is a sin.2;lc sharp apex and a 

 series of oblique ridges on the opposable surface. A small 

 plate witli a round even margin overlaps tlie outer edge 

 just behind the a|)ex, giving the appearance of a casque or 

 liood over the outer margin. 



Labium. — The anterior margin is straight, without lobes or 

 prominences. At each lateral angle, set in a dark browtj 

 socket of thick chitin, is the so-called i)araglossa — a stout 



Fi- 4. 



T-- 



-Ci 



Trichodectes gastrodes, sp. n. Copulatory apparatus, c? , x 45. 



5P= Basal plate ; £"= Endomere ; P=Paraiuere ; r=DeuticIe ou sac, 

 a. Denticle eiilarjifod. 



single-segmented lobe, tapering slightly at tlie distal end. 

 The tip of this appendage is obliquely truncate, the outer 

 margin being longer than the inner. On the apex pointing 

 inwards are lour or five minute spines set on relatively large 

 round pedestals. On the ventral surface of the labium 

 between the jiaraglossse are eight spines arranged in a circlf. 

 Immediately behind this circle is a transverse brown band, 

 which splits into two branches at each end, one running \\p 

 to tiie front margin and the other running backwards and 

 disappearing in the clear chitin behind the moulh. This is 

 probably a supporting sclerite for the labium. 



7* 



