140 MONOGRAPH I A 



claviform, deep fulvous towards the apex, lateral margin 

 pitchy black, posterior femora acutely toothed. 



Head oblong and conical, with a spot before the antennae, 

 and the lateral margin of the temporal portion fuscous ; 

 clypeus with a bifurcate depression in front, a longitudinal 

 depressed line on each side from the anterior part to the 

 occiput; antennae pale yellow, slightly clavate, the first 

 joint large, the remainder slender ; trabeculae small and 

 acute ; prothorax about the width of the head, transverse, 

 pale yellow- white, channelled in the centre, lateral margin 

 with a broad pitch yband; metathorax large, sub-quadrate, 

 the posterior margin produced and angular, channelled in 

 the centre, a broad pitchy humeral fascia extending to 

 the base ; abdomen claviform, the sutures, the first three 

 segments slightly angular, lateral margin with a sinuated 

 pitchy fascia ; legs pale yellow, and thick, posterior femora 

 acutely dentate ; ungues chestnut. Length j $ f ?. 



The only examples of this species which I have seen 

 were communicated by W. M. Tweedy, Esq. of Truro, 

 who found them upon the Gray Phalarope (Phalaropus 

 lobatus). 



40. NIRMUS ELONGATUS. Denny. (Louse of the House 



Martin.) 

 Plate VII. Fig. 4. 



Elongate, testaceous, shining, and smooth ; head conical, 

 much produced in front. 



Head long, conical, clypeus much produced, with a semi- 

 circular depression at the extremity, and a bifurcated line 

 passing down to a somewhat horse-shoe shaped depression 

 on the vertex; antennae filiform, rather short; trabeculae 

 acute ; prothorax transverse, channelled in the centre ; 

 metathorax the width of the head, transverse, lateral mar- 



