JOURNAL OF ENTOMOLOGY AND ZOOLOGY 7 
Rohwer (1911b) attains a more natural arrangement by placing 
Xeris in the Siricine. His arrangement is as follows: 
‘* Antenne long and slender, basal vein received near the middle 
of the first discoidal cell; second transverse cubitus present. 
Strecinae 
‘‘Hind tibiew with two calearia; humerus [2d A] and transverse 
median of the hind wings present. Sirecini 
“Find tibiz with one calearia [sic (!)]; humerus [2d A] and 
transverse median of the hind wings wanting. Xerum 
“Antenne short and stout; basal vein and transverse median in- 
terstititial, or nearly so; second transverse cubitus wanting. 
Tremecinae’’ 
The basal vein (Fig. 8b) is m-cu, and the first discoidal cell in 
the sense of Cresson, Marlatt, and others, M,, which, of course, 
can not receive m-cu. Evidently Rohwer means here, cell Cu,. 
Examining the several figures of wings here presented (Figs. 
6-11) it will be noted that on this character the wing of Xeris 
would fall doubtfully into the Tremicine and the wing of Teredon 
clearly into Siricine, resembling closely in this respect the 
wing of Urocerus flavicornis. The second transverse cubitus 
(Fig. 8c?) is R;, and this is frequently, probably normally, 
present in Teredon, which would thereby fall into the Siriciner. 
There are, however, two important characters which all 
authors have overlooked in differentiating the subfamilies. 
Sirex, Urocerus, and Xeris have 3-segmented labial palpi (Figs. 
4, 5, and 17), and retain the cerci. Tremex and presumably 
Teredon (although lack of material makes verification impos- 
sible) possess 2-segmented labial palpi (Fig. 16) and have lost 
the cerci. 
A further discussion of the relations of the genera would 
occupy too much space, and I shall reserve it until a later date. 
Tur Forms oF THE NAMES 
Under each genus I have indicated its derivation, gender, and 
stem to be used for derivatives. The following forms are the 
proper ones: Siricini, Siricine, and Siricide, not, as has some- 
