150 MONOGRAPHIA 



seven segments with a pitchy black triangular patch on the 

 lateral margin ; legs pale chestnut, long and rather slender. 

 Length c? f ? 1. 



Communicated by Mr. Wallace from Douglas, Isle-of- 

 Man, who found it upon the Common Snipe (Scolopax 

 gallinago) . 



52. NIRMUS CYCLOTHORAX. (Louse of the Mountain 

 Finch.) 



Plate XL Fig. 6. 



Pale fulvous-yellow, lateral margin deep chestnut ; pro- 

 thorax sub -orbicular ; metathorax transverse, posteriorly 

 truncate. Length f . 



Nirmus cyclothorax. Burmeister Handbuch ii. pt, ii. p. 429. ape. 10. 



Head and thorax pale fulvous-yellow, the former sub- 

 conical, the lateral margin sinuated before the eyes, and 

 deep chestnut, a semicircular depressed transverse line 

 across the vertex ; eyes prominent ; antennae slender fili- 

 form, the second joint the longest ; prothorax narrower 

 than the head, somewhat orbicular, with a broad chestnut 

 margin ; metathorax as ;wide as the head, narrower before 

 than behind, lateral angles acute and chestnut, posterior 

 margin truncate ; abdomen oblong, sub-claviform, pale, 

 yellow- white, median line slightly fuscous, lateral margin 

 serrulate, yellowish, with a chestnut fascia to each seg- 

 ment ; legs pale yellow, femora rather thick ; ungues deep 

 fulvous. Length f . 



The only specimen of this species I have seen was 

 forwarded by T. C. Heysharn, Esq. of Carlisle, taken on 

 the Mountain Finch, or JBrambling ( Fringilla Monti- 

 fringilla) . 



