132 MONOGRAPHIA 



First communicated by the Rev. L. Jenyns from the 

 Ring-Dove (Columba palumbus), and the Stock-Dove 

 (Columba cenas), from the latter of which I have also taken 

 specimens of the same species. 



27. NIRMUS ANNULATUS. (Louse of the Common 

 Thick-knee.) 



Plate VII I. Fig. 5. 



Testaceous-yellow, centre of abdomen fuscous, segments 

 with nearly black annuli ; antennae long and sub-clavate ; 

 trabeculse prominent. 



Nirmus annulatus? Burmeister Handbuch ii. pt. ii. p. 428. 



Head very long, sub-conical ; clypeus produced ; base 

 rotundate, a bifurcate depression anteriorly, a transverse 

 impressed line across the vertex, and a dark one at the 

 occiput, centre with a fuscous patch ; eyes very small ; an- 

 tennas pale yellow, long, slender, and sub-clavate, the second 

 joint obconic, much the longest; trabeculx curved and 

 prominent ; prothorax transverse, channelled in the centre ; 

 metathorax sub-triangular, superior margin rotundate, with 

 a fuscous fascia on each side, and a deep foveola near the 

 lateral angles, posterior margin ciliate ; abdomen ovate ; legs 

 pale testaceous -yellow ; anterior femora lobate . Length f . 



For a specimen of this species I am indebted to the Rev. 

 L. Jenyns, who took it from the Common Thick-knee, or 

 Thick-kneed Bustard (GEdicnemus crepitans). 



28. NIRMUS NEBULOSUS. (Louse of the Starling.) 



Plate XI. Fig. 13. 



Pale yellow- white, lateral margin bright fulvous, the first 

 six segments with triangular chestnut patches ; head and 



