( xlvi ) 



He also exhibited the following drawings of genital arma- 

 tures of ^ ants, viz. : — 



Lasius niger, Myrmica scabrinodis, M. scabrinodis var. 

 sabuleti, M. ruginodis, M. laevinodis, and M. sulcinodis. The 

 only one of the Myrmica group to show any marked difference 

 is M. sulcinodis, where the stipes is longer and the volsella 

 dilated at the end of the curved portion. Those of M. rugi- 

 nodis and M. laevinodis are very similar, and differ from that 

 of M. scabrinodis by the greater width of the lobe of the 

 volsella. M. scabrinodis and var. sabuleti are almost exactly 

 alike. The armature does not appear to be of much value for 

 specific differences in these ants, and a drawback to its use in 

 general is the difficulty of obtaining (J o with the $ ?. 



Teratological Specimens of Coleoptera. — Mr. H. 

 WiLLOUGHBY Ellis exhibited a male specimen of Carabus 

 netn oralis, Mull., which is also interesting as a variety, being 

 much smaller than typical specimens and the interstices of 

 the elytra being more rugose and raised into bar-like forms 

 somewhat as in Carabus monilis, F., var. consiius, Pz. The 

 specimen was taken at Braemar, May 7, 1912. Teratologically 

 the right posterior leg is little more than half the size of the 

 left one, though the parts in themselves are quite proportion- 

 ate, the femur and tibia being quite perfect on the smaller 

 scale ; the tarsus, which is also proportionate, has the ith joint 

 truncate at the base, making it much shorter, and is soldered 

 to the 5th joint which is rather broadened. The terminal 

 claw is thicker, blacker and blunter than the others. 



He also exhibited a specimen of the dark variety of Campylus 

 linearis, L., taken at Knowle, Warwickshire, in June 1899. 

 It is of the usual size and, with the exception of the thoracic 

 foveae being more exaggerated and the right intermediate 

 tarsus being very remarkable, is normal in all respects. This 

 tarsus consists of (1) a complete tarsus normal in all respects, 

 (2) a second tarsus thickened in all the joints up to the 4th, 

 from which springs a pair of 5th joints of normal size, both 

 being terminated by a perfect claw, (3) another growth, 

 presumably an embryo tarsus, has started out from the 

 centre of the tibia. These give the appearance of quite a 

 sheaf of tarsi. 



