6 NEW YORK STATE MUSEUM 



being annulated or not. Species not closely related to each other 

 occur in his subgenera, as they do in any other attempt to divide 

 them. His genera are not now generally recognized. The Asiatic 

 species have been placed in several genera. The genus Thyestes 

 erected by Mr J. Thomson for a Japanese species has no character 

 not found in one or the other of our Saperdas ; and we consider his 

 species pubescens allied to puncticollis with some charac- 

 ters also of lateralis; and its annulated antennae connects it 

 with the more highly specialized ones. Another point that shows its 

 close relation to puncticollis is the possession of a process on 

 the anterior claw of the middle pair of legs only ; and the form of 

 this process also resembles that of puncticollis. Another 

 genus, Eutatrapha, has been erected by Bates for those Asiatic species 

 with the sides of the elytra carinated. We consider this character a 

 sign of specialization and not of generic value, as we find it in an 

 advanced rudimentary state in our tridentata, where it is not 

 equally marked in all specimens. It is formed by the arrangement 

 of the punctures and is quite different in appearance from the extreme 

 form found in Eutatrapha (Saperda) metallescens. 

 Eutatrapha fSaperda) i6 -punctata and v a r i c o r - 

 nis (S. carinata) have this character also, but not so strongly 

 marked. It can be traced in some other of our species, as S. d i s - 

 c o i d e a ^ and S. h o r n i i , where a straight line of punctures, more 

 or less pronounced in different examples, shows the most primitive 

 form of this character; and its entire absence in some individuals of 

 d i s c o i d e a robs it of any generic value it seems to possess in its 

 more highly specialized form. To show the slight value of this and 

 other characters taken separately, we would call attention to P a r a - 

 glenea fort unci from China, which has the elytra carinated 

 and has both claws of all the legs armed with a spine as in 

 lateralis. It is closer to Saperda than any other genus. 

 Glenida suffusa has the elytra carinated but lacks the pro- 

 cess on the claws, and is only distantly related to Saperda. Several 

 other genera were desired for study but material was not obtained 

 in time for this bulletin. The males of metallescens haA^e 



