220 MONOGRAPHIA 



Head obtusely sub-triangular, vertex depressed ; clypeus 

 with a chestnut spot on each side, and a narrow diagonal 

 fascia before each eye, base truncate ; eyes black ; protho- 

 rax nearly as wide as the head, transverse, ob-conical, base 

 slightly produced in the centre, bordered with long hairs' 

 metathorax the width of the head, transverse ; abdomen ob- 

 tusely elliptical, pale fulvous, each segment with a broad 

 band of pale chestnut, except the last two, lateral margin 

 serrulate ; legs obscure fulvous, the superior margin dusky. 

 Length |. 



Infests the Green Wood-pecker (Picus viridis), commu- 

 nicated by the Rev. L. Jenyns from Cambridgeshire, and 

 from Norfolk by my brother. 



5. MENOPON CITRINELLJE. Denny. (Louse of the 



Yellow Bunting.) 



Plate XXI. Fig. 3. 



Pale fulvous-yellow, shining and pubescent ; head semi- 

 lunar, with two black spots ; prothorax truncate before and 

 behind. 



Head semilunar, with a conical black spot before each 

 eye, and a narrow sinuated transverse band at the occiput, 

 vertex concave ; eyes black ; prothorax wider before than 

 behind, anterior and posterior margin truncate, a depressed 

 line across the front, united with two lateral lines ; meta- 

 thorax large, transverse, base slightly rotundate abdomen 

 oblong, lateral margin somewhat serrulate, last segment 

 densely pilose ; legs long. Length \ to f . 



Found on the Yellow Bunting (Emberiza citrinella) ; I 

 received one specimen from the Pied Wagtail (Motacilla 

 alba). 



