304 MODERN SYSTEM. 



five articulations, the first three gradually shorter, the fourth longer 

 and wider, tlie fifth shorter, and receiving the didact^■le claw: ubdo- 

 men in both sexes with eight joints : Female ? with the first seg- 

 ment of the hack produced, the fourth and remainder partly con- 

 cealed, the last segment at its apex furnished with a setigerous 

 st}le : Male ? with the last segment largest. 



Its situation was referred to the Dipfira by Latreille, who ob- 

 serves, in a. note, that it may probably be found hereafter to consti- 

 tute a peculiar Order of insects. From the apparent want of an- 

 tennae, and from the conduence of the head and ihorax. Dr. Leach 

 placed it amongst the Axachndida, in a division by itself Its mode 

 of propagation is unknown. Hermann considered the se.xual as spe- 

 cific differences. 



Sp. 1. JVycf. Hcrmunni. 



Phthiridium hiarticulatmn. lierm. Man. Apt. ^Qi.pl. 6. Jig. 1. 0(nrs,80. 

 Hippobosca X'espcrtiiionis. Sc/n: Fr. Bril. 2587. riilhiridiuni Her- 

 marnii. Leach, Enc^ct. Brit. Supp. vol. i. 446. pi. To. — Zool. Misc. iii. 

 35, pi. 141. 



In the plate given in the third volume of the Misccllani/, repre- 

 sentations are sriven of the sexes verv much magnified, with one leg 

 still more highly increased by the aid of the microscope. The se- 

 cond joint of each tibia is longer than all the joints of tlie tarsus 

 taken together. 



Inliabits the greater g.nd lesser horse-shoe bat. 



