488 



.MKIIISTH 1 VAIII A 'I ION. 



[PART I. 



of tin--.- it was clear that they are a pair. When extended the 

 ill!.-'- plantar surfaces are ii"t truly iu a horizontal plane, as they 



I i . L58. /:/<.< iiniiiitii*, No. TJil. The right fore leg seen from dorse-posterior 

 /'. post.-rior far.-. .1. anterior face. This figure was drawn from the 

 mien i- !.]! ami has been rever-ed. (From a specimen the property of Dr Mason.) 



-Imuld be in Position A, but they are nearly so. 



is exaggerated in the figure. Specimen verv 

 Dr V 



This deviation 

 kindlv lent bv 



Aleochara mrrsta tStaph.i: middle left tibia has two articulations at apex. 

 p.i-t. nor bears a tar>us normal in form but without claws. The anterior bears 

 an extra tar-al s. rie- with a ]>nir of rudimentary terminal joints, each having a pair 

 .if claw-. ( f this double tarsus the :ird and 4th joints are not distinctly separated. 

 Tin- parts are in I'o.-ition A. Specimen kindly lent by Dr MASON. 



74S. Meloe proscarabacus J i Hi teromera). The apex of the femur of right hind 

 leg i- < xt. iidi '1 "ii the aiiterioi side so as to form a second apex in the same hori- 

 xontal plane. With this second apex articulates the common head of a pair of extra 

 tibia- each bearing a complete tar>u-. As ir-ual they are a right and a left respectively. 

 Ih. two extra legs are twisted out of their natural position so that they turn their 

 ventral surface- upwaid-. The tibia which in origin is remoter from the normal 

 tibia is moreo\ei bent over the nearer tibia MI that it stands actually nearer to the 

 noi mill tibia. In this way the morphological relations are obscured, but nevertheless 

 on tracing the. ventral surfaces up to th. point of articulation with the femur it is 

 leai that they arise in the normal position and that they have the relations marked 

 in the Scheme for the 1'o-itioii A. \\hicli is their position of origin. As this case is 

 a -omewhat oli-cure one. I may add that I r Sharp, who has kindly examined this 

 -p. cimen. gives me l<a\e to state that he concurs in the above description. This is 

 the -pecimeii de-cnhed by VON HKVHKN, />/.<, isi-iii, ix. ]). 7lil and by MOCOI-KKYS, 

 <'<il. .iiKTni. p. ">-2, ii;i.. and was kindly lent to me by Dr L. VON HKYDHN in whose 

 possession it remain-. 



( Hi. Cetonia opaca i l.amell.) : [right fore leg bears a pair of extra terminal tarsal 

 joint- v.ry nearly in Position A, arising from 4th tarsal joint. All the claws are 

 tinned \entralwaid-. but those of the extra joints are turned away from each other 

 a- well a- downward-J. Mm QU1 RYS, I.e., p. til. /i.'/. 



Prionus coriarius $ ( Longirorn ), having parts of a super- 

 numerary pair of tarsi arising from the middle right tarsus, 

 and also a similar double Mrueture arising from the posterior 



