CHAP. XX.] 



EXTRA legs: position dp. 



497 



* 



7 gO. Carabus irregularis J ; left middle leg and right hind leg bear- 

 ing supernumerary tarsal portions. In the left middle leg, Fig. 164, I, 

 the 2nd tarsal joint is short and thick ; the 3rd joint is partially double, 

 as shewn in the figure. One of its apices bears a tarsus of reduced 

 size, and the other apex, which is postero-dorsal, bears a double tarsus 

 having common 4th and 5th joints. The 5th joint of the latter bears 

 two pairs of claws which curve ventrally and partly towards each 

 other. The figure I shews the appearance from the ventral or concave 

 side of the claws, while the figure II is drawn from the convex or 

 dorsal side. The disposition and small number of the spines on the 

 ventral side of the extra 5th joint shew that the ventral surfaces are 

 partly suppressed, and in fact that the surfaces which are adjacent in 

 the extra tarsi are in part ventral surfaces. This view is also borne 

 out by the direction and curvature of the claws. Eelatively to each 

 other and to the normal the extra parts have nearly the Position DP. 



7-° 



III 



Fig. 164. Carabus irregularis. I. Semi-diagrammatic view of left middle leg 

 from antero-ventral surface. I 1 , the claws of normal left tarsus, r, I 2 , claws of extra 

 tarsi compounded together. lh l , hair marking the dorsal surface between the claws. 

 A, anterior. P, posterior. II. Dorsal view of apex of extra tarsus rh, Ur, two hairs 

 marking dorsal surfaces. III. Dorsal view of right hind leg. c'c', c"c", claw-like 

 spines, perhaps representing extra claws. (Specimen the property of Dr Kraatz.) 



The right hind tarsus has the form shewn in Fig. 164, III. The 3rd, 

 4th and 5th joints are not fully separated from each other. Both the 

 4th and 5th joints bear extra parts, but their nature is obscure. The 

 5th joint is partly double, and the anterior part bears two shapeless 

 claw-like spines (c'c). The 4th joint bears a similar pair of claw-like 



b. 32 



