398 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Dyer MacGillivray, Proceedings of the United States National 
Museum, vol. 29, no. 1438, p. 569-654, pi. 31, figs. 56 and 57 
{Tenthredo and Macrophya), 1906. The late Fr. W. Konow's 
system will be found illustrated and explained in the Zeitschr. 
fiir Syst. Hym. and Dipt., vol. 1, part 1, p. 37-39, 1901. 
Fore Wings (PL 5, fig. 11). — The fore wings are large. The 
stigma is large and well chitinized, and the basal portion (portion 
internal to the stigma) of the costal vein becomes spatulate 
before reaching it. The costal cell though sometimes hyaline is 
usually more or less translucent and the relative degree of translu- 
cency is indicated by such terms as slightly, moderately, fairly 
strongly, and strongly translucent. The marginal or radial cell is 
always divided by a more or less curved or bowed radial cross- 
vein. There are four submarginal or cubital cells normally. 
The basal vein meets the subcostal considerably basal to the point 
of origin of the cubital vein and is parallel with the first recurrent 
vein. The second and third submarginal or cubital cells each 
receive a recurrent vein. The lanceolate cell is normally divided 
by a short vertical cross-vein. The second cubital cell, as a rule, 
contains a strongly developed point or dot in its apical half, and 
there is usually a fainter one in the apical half of the median cell. 
The costa is, as a rule, ferruginous, or pale ferruginous (beyond 
the stigma it is, as a rule, duller), and unless it is distinctive from 
the general condition it will not be mentioned in the descriptions. 
The submedian and anal veins are usually in part or entirely paler 
than the rest. 
Hind Wings (PI. 5, fig. 10). — The radial and lanceolate cells, 
unlike those of the anterior wings, are undivided, and the stigmal 
cell is unchitinized. There is only one closed submarginal or 
cubital cell and only one closed discoidal cell, the two constituting 
the "middle cells." The cubital cell contains, as a rule, a chitin- 
ized dot at its lower anterior angle, but it is not as strongly devel- 
oped as the one in the second cubital cell of the fore wing. The 
transverse medial vein meets the submedian before, at, or bej^ond 
the point of union (apically) of the latter with the anal vein. 
The anterior margin above the stigmal cell is furnished with a 
series of frenal hooks which, during flight, catch hold of the frenal 
fold in the hind margin of the anterior wing, along the apical 
portion of the anal cell. 
