ANOPLURORUM BRITANNIA. 27 



3. H^EMATOPINUS SPINIGER. ( Louse of the Water 

 Campagnol.) 



Plate XXIV. Fig. 6. 



Head elongate ; occiput acute ; abdomen ovate, with the 

 lateral margin of the first six segments terminating in a 

 strong tooth ; legs thick and nearly equal. 



Pediculus spiniger. Burmeister Genera Insectomm, Ord. Rhyn. sp. 9. 

 plate, Gen. Phthirius, fig 5. 



Pale tawny yellow ; head ferruginous, elongate ; occiput 

 acute ; eyes small, situated at basal angles ; antennae very 

 thick, shorter than the head and inserted in a sinus on the 

 anterior margin ; thorax ferruginous, about half the length 

 of the head, transverse, anteriorly with a deep sinus, poste- 

 riorly concave truncate ; abdomen oblong ovate, the lateral 

 margin of the first six segments terminating posteriorly in a 

 sharp tooth ; the sutures well defined and spinulose ; apex 

 and sides ferruginous ; legs thick ; femur short ; tibia very 

 large with two teeth at the apical extremity ; ungues ferru- 

 ginous and strong. Length . 



First communicated by the Rev. L. Jenyns. 



Stirps II. Abdomen with nine segments. 



4. HJEMATOPINUS LYRIOCEPHALUS. (Louse of the Hare.) 



Plate XXIV. Fig. 4. 



Testaceous ; abdomen greyish yellow : head lyrate, front 

 acute; occiput acuminate; antennae sub-clavate; legs rather 

 slender. 



Pediculus Lyriocephalus. Burmeister Gen. Insect. Order Rhyn. sp. 11. 

 Elongate, testaceous, hairy ; head lyrate, front acute ; 

 occiput acuminate, with two longitudinal impressed lines, 



