55 



tioii is unknown. Hermann considered the sexual as spe- 

 cific differences. 



Sp. 1. Phthiridium BlainvUlii. 



Pii. pedibus longis tenuibus ; femoribus articulo 2 tibiisque 



arliculo 1 apicem versus gradatim attenuatis. 

 Long. Corp. 1 1 lin. 



Habitat in Insula Isle de France. Benigne mihi commu- 

 nicavit amicus Blainville. Minor Phthiridio Hermanni. 



This is probably the species alluded to by Latreille in 



his Genera, p. 364. 



.'> 

 Sp. 2. Phthiridium Hermanni. 



Tab. 144. c?, ? et pes aucti. 

 Ph. pedibus longis; femoribus articulo 2 apicem versus gra- 

 datim attenuato ; tibiis articulo 1 ultra medium subtus 

 gradatim dilatato apicem versus gradatim attenuato. 

 Phthiridium biarticulatum. Herm. Mem. Apt. 1 24. pi. 6.f. 1 . 



Olfers 80. 

 Hippobosca Vespertilionis. aSc///'. Fn. Brit. 2587. 

 Phthiridium Hermanni. Leach. Encycl. Brit. Suppl. 1. 



446. /;/. 23. 

 Celeripes Vespertilionis. Mont. Trans. Linn. Soc.W.W^ 



t. 3./. 5. 

 Long. Corp. 2 lin. 



Habitat in Rhinolopho Ferro-equino vulgatissime. 

 Stili caudales (foeminae) elongati cylindracei. 



In the plate representations are given of the sexes very 

 much magnified, with one leg still more highly increased by 

 the aid of the microscope. The second joint ot each tibia 

 is longer than all the joints of the tarsus taken together. 



