484 MERISTIC VARIATION. [part I. 



in the position marked V in the Scheme and having precisely 

 the relations there shewn. Specimen first described by Kraatz, 

 G., Bed. ent. Zt, 1873, p. 432, fig. 9. I am greatly indebted to 

 Dr Kraatz for an opportunity of examining it. 



737. Carabus marginalis : penultimate joint of left hind tarsus is en- 

 larged and presents two articular surfaces, a proximal one on the 

 ventral surface, and another at the apex. The latter bears the normal 

 last joint with its claws. From the proximal articular surface arises a 

 thick joint shorter than the normal last joint, bearing at its apex two 

 pairs of claws set back to back, as in the Position V. Specimen rede- 

 scribed from Kraatz, G., Deut. ent. Zt., 1880, xxiv. p. 344, PI. n. fig. 29. 



738. Carabus granulatUS <£, left posterior tibia bearing an amor- 

 phous rudiment of two extra tarsi arising from the ventral surface of 

 its apex. The apex of the tibia is produced at the dorsal border to 

 form an irregular process which bears a tarsus of normal form but 

 reduced size and immediately ventral to this tarsus is a pair of tibial 

 spurs. Ventral to these spurs is another deformed pair of spurs and 

 below them again is a deformed 3-jointed rudiment which probably 

 represents two tarsi. Ventral to the rudiment of the extra tarsi is 

 a third deformed pair of spurs. It was not possible to recognize the 

 surfaces of the tarsal rudiment, but the presence of two extra pairs of 

 spurs indicates plainly that the extra parts are morphologically of double 

 structure ; and as the spurs indicate the morphologically ventral sur- 

 faces, it follows that the surfaces adjacent in the extra tarsi are 

 dorsal. This specimen was originally described by Dr L. Von Heydex, 

 who was so good as to lend it to me for examination, see Deut. ent. Zt., 

 1881, xxv. p. 110, fig. 26. 



739. Prionus coriarius (Longicorn) : three legs in region of right 

 posterior leg. The proximal relations not quite clear and hence it is 

 not easy to distinguish the normal. Presumably it was the most dorsal. 

 This leg was of normal form but of reduced size and it wanted the 

 claw-joint. Internal to it, arising by a double coxa, trochanter and 

 femur, were the other two legs. The remoter was a normal right, but 

 the nearer was a left leg of reduced size, slightly crooked and lacking 

 three apical tarsal joints. The compound femur was just as in No. 73G. 

 The normal leg must either have been the most dorsal or the most 

 ventral. If the former, the extra parts are in the Position V ; if the 

 latter, they are in the Position D, but in this event the normal would 

 be compounded with one of the extra legs. [Kedescribed from descrip- 

 tion and figure given by Krause, Sitzb. nat. Ft. BerL, 1888, p. 145, fig,] 



740. Melolontha vulgaris ? (Laniellicorn) : right posterior femur bears a super- 

 numerary pair of limbs having a double tibia in common. The supernumerary 

 parts are rather smaller than the normal ones. [The position of origin and 

 symmetry, according to the figure, must have been approximately V.] Kolbe, H. 

 J., Naturw. Wochens., 1889, iv. p. 10!), fig. 



741. Carabus perforatus $ : *rom the ventral or plantar surface of the 5th tarsal 

 joint of left hind leg project an extra pair of claw-joints compounded in Position V, 

 each bearing a pair of claws, set back to back. This is a diagrammatic case, well 

 and clearly described by Asmuss, Monxtr. CoUop., 1835, p. 54, Tab. IX. 



