On the Thorax in Anoplura and in Nesiotinus. 171 



found accompanying an adult male, and there is some doubt 

 whether it really is the female of IT. capita. However, 

 until more evidence is forthcoming-, it is best considered as 

 such. 



Cormcularia karpinsJcii, Camb. 



CornicnUiria pavitans, Camb., List of Uritisb Sa InAi Spiders, 1900. 

 Neriene pavituns, Camb., Trun.''. Linn. Soc. Lond., vol. xxviii., 1873, 

 p. 543, pi. xlvi., lig. \ii. 



Cormcularia pavitans, of which the ty)ie is a female, is a 

 very striking species, and is identical witli C. /iU7'/nnskii, 

 which has priority. Mr. Cambridge will shortly publish a 

 note on this subject, which 1 will not anticipate. I obtained 

 a pair of C. karpinskii on Helvellyn on August 28th, 1900. 

 They were taken together under one stone, and the association 

 of the male with the female is thus established. 



XII. — Sate on the Thorax in Anoplura and in the Genus 

 iS'esiotinus o/ the Maliophaga. 13y EuuCE F. (JUMMIXUS 

 (British Museum of iS'alural History). 



(Published by permission of the Trustees of the British Museum.) 



TuoRAx IN Anoplura. 



The three segments of the thorax are fused together *. On 

 the dorsal surface in most species may be seen certain trans- 

 verse bars or rafters of thick chitin, which serve to support 

 the thoracic nota, to provide on the extreme lateral margin a 

 point for the attachment of the coxae on each side, and may 

 roughly represent the original delimiting lines between pro-, 

 meso-, and nietanotum. No epimeral or episternal pieces 

 can be traced at the sides. The fused thoracic nolum fits 

 down as a kind of " lid " upon the sternal surface, which 

 shows no sign of segmentation at all, and in many species 

 carries a single sternal plate of various sizes and shapes. 



These notal rafters — or, if we use the cautious phraseology 

 of the systematist, " bands" — are important elements in the 

 exoskeleton, and are frequently made use of by descriptive 

 writers, and certainly afford useful, if superficial, characters. 



Tlie Anopluran thorax to the comparative anatomist is of 



* My friend Mr. Harrison points out that tlie prolhorax is distinct in 

 ll<emutumyzi(.^, which i have not seiu. 



