1938 ] 
Orussus sayii 
95 
earlier. This fact should be significant in declaring the two 
synonymous. 
S. A. Rohwer (Proc. Ent. Soc. Wash., 1917, vol. 19 : p. 95) 
wrote, “We have not yet been able to locate a male to go with 
this female (O. terminalis) , and it is possible that the male 
of the species will have the abdomen entirely black and that 
it is at present confused under the name sayii ” 
In view of Mr. Rohwer’s statement, and judging from 
some hundred and more specimens collected from a single 
tree over a period of three years, it seems quite probable that 
0. sayii and 0 . terminalis are the sexes of the same species, 
which, according to priority, should be called Orussus sayii 
Westwood, since it was described in 1835, while Newman's 
species was not described until 1838. 
It may be of interest here to note that the figure of Orussus 
terminalis in H. H. Ross' “Generic Classification of the 
Nearctic Sawflies" on plate IX, fig. 169 belongs to sayii. 
According to a letter from Dr. Ross, the specimen does have 
the abdomen black and would key out to sayii. 
The synonymy of the species then is as follows : 
Oryssus sayii Westwood, Zool. Journ., 1835, vol. 5 : p. 440. 
Oryssus terminalis Newman, Ent. Mag., 1838, vol. 5 : p. 486 
(New Synonymy) . 
Oryssus haemorrhoidalis Harris, Rept. Ins. Mass., 1841 : p. 
394 (Synonymy by Rohwer, Proc. Ent. Soc. Wash., 1917, 
vol. 19 : p. 95) . 
