122 MONOGRAPHIA 



I found on the Bittern (Botaurus Stellaris), and supposing 

 it undescribed, have named it in allusion to the tessellated 

 appearance of the abdomen. 



13. NIRMUS LIMBATUS. (Louse of the Crossbill.) 



Plate IX. Fig. 3. 



Pale yellow-white, smooth, and shining, lateral margin 

 black ; head rotundate in front ; legs rather thick with dark 

 annuli. 



Nirmus limbatus ? Burmeister Handbuch ii. pt. ii. p. 429. spe. 13. 



Head and thorax pale luteous ; clypeus rotundate, mar- 

 gined with black, base sub-truncate, vertex slightly chan- 

 nelled ; antennae filiform, the second joint much the longest; 

 trabeculse very short ; prothorax short, quadrangular; meta- 

 thorax transverse, posterior margin produced in the centre ; 

 abdomen oblong, apex obtuse, dirty white, somewhat ful- 

 vous down the centre, underside with a distinct brown band 

 from base to apex, lateral margin black ; legs pale yellow, 

 very strong ; tibia3 and femora with a dark annulus, the an- 

 terior femora enlarged. Length j. 



Communicated by my brother from the Crossbill 

 (Loxia curvirostra). 



14. NIRMUS SUBCUSPIDATUS. (Louse of the Roller.) 



Plate XI. Fig. 1 . 



Pale fulvous-yellow, smooth, and shining ; head with a 

 chestnut angular patch on each side; clypeus sub-acuminate; 

 abdomen with transverse fulvous bands. 



Nirmus subcuspidatus. Burmeister Handbuch ii. pt. ii. p. 430. 



Head sub-cordate, fulvous ; clypeus sub-acuminate and 

 depressed, a chestnut acutely angular patch on each side 



