PvrrJiosoma. 



257 



line ; hind-margin a little concave ; bearing centrally 

 a palish rectangle, with dark boundar}', and crossed 

 by two small parallel lines ; posterior corners with 



Fig. 47. — Nymph of Pyrrhosoma NYiiPHULA. 



(X A.) 



conspicuous spines. Prothordx rather small, rectangular, 

 with the four corners rounded, bearincr some whitish 



