544 



MERISTIC VARIATION. 



[TART i. 



*S43. 1. Leys. 



Prionus californicus (Longic.): each femur bore two tibiae 

 and tarsi; both maxillary palps and also the left labial palp were 

 partially double (Fig. 203). [No statement as to riyht labial 

 palp. This shewn in fig. much thicker than left, but on com- 



FIG. 203. Priumm californicus, No. 843, having extra legs and palpi. (After 

 Jayne.) 



paring with a specimen it seems to be of normal thickness.] 

 In some of the legs the two tibiae are compounded at their bases, 

 in others they articulate separately. [Several details given ; and 

 in particular, enlarged views of the palpi and of the bases of 

 the tibia-. But as no details are given regarding the apices and 

 apical spurs of the tibiiu nothing can be said as to symmetry. 



It will be remembered that we have already had a case of 

 a Prionits, No. 750, which similarly was supposed to have two 

 of its legs double ; but there by means of the tibial spurs it was 

 shewn that the extra, part was in Secondary Symmetry. Possibly 

 enough the same could here be shewn. It is much to be hoped 

 that this specimen can be traced.] JAYNE, H. F., Trans. Ainer. 

 Ent. Soc., 1880, vni. p. 159, fig. 12. 



844. Allantus sp. (Tenthred., Sawfly) : extra leg borne by coxa 

 of right middle leg. This coxa is imperfectly double, bearing 

 two separate trochanters. Of these the anterior bears a small 

 leg which, though ill formed, is complete in all its parts, but 

 has the tarsal joints of abnormally small size. The posterior 

 trochantt-r bears a leg of full size. Its femur curves forwards 

 and then backwards. The femur of the smaller leg curves for- 



